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PerformanceLifts.com receives 1000's of e-mails each year and a good percentage of those involve questions about selecting the correct size wheel for use on a leveled or lifted vehicle. Wheel offset and backspace are critical to ensure your tire and wheel combo fit your Truck or SUV correctly. A wheel with too much backspace may not even bolt up to the vehicle, a wheel with too little backspace may allow the tire to rub when turning. We've already put together a growing list of factory wheel sizes and the offset / backspace (available by clicking here) but customers have asked for more information. This instructional page is designed to explain how offset and backspace are related and how they can affect tire and wheel fitment on your vehicle.
Question: Will the aftermarket wheels I am looking at purchasing stick out farther than my factory wheels?
Answer: This question is best answered using an example. If your factory wheel is 8.00" inches wide and you install an aftermarket wheel that is 9.00" inches wide the width increase alone will push the outer wheel lip out by 1.00". In other words, the 9.00" wide wheel will stick OUT by an additional inch. Here is where Offset and Backspace become really important. If your factory 8.00" wide wheel has +25.4 (positive 25.4 millimeters) of offset it will have a backspace measurement of 5.50" inches. If aftermarket 9.00" wide wheel has -12mm (negative 12 millimeters) of offset the backspace measurement will be reduced to 4.53" inches. That means the change in offset has resulted in a change in backspace. More specifically the reduction in offset has resulted in a reduction of back space. That means the -12mm offset will push the aftermarket wheel OUT an additional 1.00" inch more than the factory wheel, which results in a total outer wheel lip width increase of 2.00" inches. The amount the wheel sticks OUT beyond the fenders will go up if you run an aftermarket wheel that is wider than your factory wheel. The wheel will stick OUT even more if the amount of offset or back space is reduced.
Question: Will a (insert tire size here) fit with my lift? The lift /leveling kit manufacturer says it will!
Answer: That depends largely on the width and back space of your wheels. Lift kit and leveling kit manufacturers will usually also recommend the wheel size for use with the maximum recommended tire size that will work with their lift. If a manufacturer says "Clears 35" Tires on 8" Wide Wheel w/5.00" Backspace" that means you need to follow those recommendations. Let's say that instead of running the recommended 8.00" wide wheel you decide to install an aftermarket wheel that is 12.00" inches wide. That means the new wheel will stick OUT approximately 4.00" inches more than the recommended wheel. A combination like that (35" tire on a 12" wide wheel) will in almost all cases cause clearance issues because when the tire and wheel go beyond the fender opening the tire is more likely to rub when turning. A general rule of thumb is if you want to run a WIDE wheel you will need to run a SHORTER diameter tire to ensure proper clearance when turning.
Question: Why does the Lift / Leveling Kit manufacturer say I can't use my factory wheels with their lift? They are the same diameter and width as the recommended aftermarket wheels!
Answer: Simply put, BACKSPACE! If a manufacturer states their product is not compatible with the factory wheel you need to pay attention to this information. The number one reason is because the factory wheel will rub the aftermarket suspension components. Some lift and leveling kits will replace factory steering and suspension components with ones that reduce the amount of clearance between the wheel and tire sidewall. A factory 17x8 wheel with 5.50" inches of back space may rub the suspension components, but an aftermarket 17x8 wheel with 4.50" inches of back space will not. In most cases the lift and leveling kit manufacturers will specify if their product is compatible with a specific factory wheels. For instance, with certain lifts a factory 20" diameter wheel can be safely used when a factory 17" wheel cannot. The reason for this is the opening of the 20" wheel allows for clearance with the suspension components that the 17" wheel does not.
Question: I've found an aftermarket wheel I really like, but it's available in two different offset options. Which should I use?
Answer: A number of wheel manufacturers will offer the same wheel style in different offsets. We recommend selecting the offset that best matches the recommendation provided by the lift or leveling kit manufacturer. Remember, as positive offset increases so does back space. You might find that one wheel offset will work just fine and the other is not at all compatible.
Question: My buddy / Internet says I can run this size tire just fine, even though the manufacturer says I can't. What should I do?
Answer: Will your buddy / Internet fix things if the tire and wheel combination you select doesn't work out right? If you spend $5000.00 on a bitchin' custom 22x12 wheel and tire setup that doesn't fit properly is your buddy going to fix that for you? We know the Internet won't. If you want to be sure the tire and wheel combination will fit properly we recommend you follow the lift or leveling kit manufacturers recommendations. If you still have questions or would like advice on selecting the correct tires and wheels for your vehicle please click on the ASK A QUESTION link located at the very top of this page.
Starting with the 2011 model year General Motors did a complete re-design of the suspension and frame on the 2500HD and 3500 series trucks. This means that almost none of the products designed for use on a 2010 2500HD will fit a 2011 2500HD. GM made some very slight revisions to their 2015 model year but all of the products that CST offers for the 2011-2014 trucks will also fit the 2015. So if you've got a 2011, 2012, 2013, 2014 or 2015 Silverado or Sierra 2500HD / 3500 truck the products on this page will fit. Please note that some products may be engine or transmission specific. An example would be if a product is either Diesel or Gasoline specific that will be noted. If a product is 2wd or 4x4 specific that will be noted.
CST Performance Suspension has been a leader in the aftermarket suspension industry for over two decades. CST is very well known for offering superior suspension lifts and accessories designed for the Heavy Duty line of Chevrolet Silverado and GMC Sierra trucks. Performance Lifts customers have been asking for help putting together complete suspension system for their trucks. We've created two separate pages for the 6-8" lifts and the 8-10" lifts.
If you still have questions please click on the "ASK A QUESTION" link located at the very top of this page.
The latest addition to Pro Comp’s line of Federal Motor Vehicle Safety Standard (FMVSS) 126-compliant suspensions is their 6-inch system for the 2014 Ram 1500. The test was performed on a half-ton Ram truck equipped with the 6-inch Pro Comp suspension, 20-inch Pro Comp alloy wheels, and 35x12.50R20 Pro Comp Xtreme A/T tires as the only modifications to the vehicle.
A wide array of outriggers and sensors were installed to monitor and ensure that the suspension system does not compromise the Electronic Stability Control (ESC) systems that are government mandated on all new vehicles. On the closed test course, the Pro Comp equipped vehicle was accelerated to 50 mph at which point the computer takes over. The robotically controlled wheel spins abruptly; left and right, up to 300 degrees in less than half a second and returns back to dead center causing the truck to change direction and begin to slide. This event caused the trucks ESC system to activate and regain control. When the data was analyzed, it conclusively demonstrated that the Pro Comp products did not interfere with the performance of the Ram 1500’s ESC systems.
Ram is the only auto manufacturer currently offering a coil sprung rear suspension on their trucks, which created a unique set of challenges that have left other suspension manufacturers flustered. “As the only half-ton truck on the market with a standard rear coil springs and a diesel engine option, the new Ram 1500 is going to play a big role in new vehicle sales in the coming year,” explained Adam Trowbridge, Pro Comp Suspension Brand Manager. “Consumers want a more impressive performing suspension off-road, while still maintaining all of the vehicle’s safety features on-road. Pro Comp works hard to make sure our kits excel in both environments.” Unlike other manufacturers that have elected to do self-testing through laboratory simulation, Pro Comp’s testing was performed on a test track where the true capabilities of their products could be measured more accurately.
If you are looking for a 6" Lift Kit for your new 2014 Ram 1500 4x4 truck the ProComp kit is an excellent choice. It has proven itself to be compatible with the factory Electronic Stability Control systems while still providing 6" inches of suspension lift.
For years customers have been asking for an easier installation option for AMP Research Steps. The actual step installation is relatively easy on most vehicles but the wiring portion of the install can really test the patience of even the most experienced installer. AMP Research has simpified installation of the Powerstep with the release of their new Plug-and-Play wiring harness. This harness makes installation much easier as it simply plugs into the vehicles OBD-II port. This harness will still allow the use of the port for diagnostic tools, programmers, or any other accessory that requires access to the port. The AMP Plug-and-Play harness is vehicle specific and eliminates the need to properly locate and tap into the factory wiring loom. This allows you to complete the installtion of the AMP Powerstep in less time and does not require taking the dash or door panels apart. This can shave literally HOURS off the normal installation time. For more information on AMP Powersteps please visit PerformanceLifts.com or click on the following link: http://performancelifts.com/catalogsearch/advanced/result/?manufacturer=152
Performance Lifts has been selling Truck and Sport Utility Vehicle accessories since 1996. Our focus is providing customers with high quality suspension lifts and leveling kits designed to improve the performance and capabilities of modern Trucks and Sport Utility Vehicles. Whether your vehicle is a daily driver, expedition vehicle, work truck or a weekend toy, we have years of hands-on product knowledge that will help you to modify your vehicle the right way the first time. Please contact us by telephone at (949) 629-3017 or visit us on our website at www.PerformanceLifts.com.
This is the time of year when some customers are in a hurry to receive their orders. To help answer questions about delivery dates we have come with up this Holiday Delivery Chart. PerformanceLifts.com cannot guarantee delivery by December 24, 2013 on all purchases. If you would like to check if delivery can be made by December 24th we recommend you contact us before placing an order. Sales@PerformanceLifts.com
Please note that during this time of year weather related delivery delays are possible. Shipments are routed all over the USA and Snow and Ice related delays do happen. Just because it is warm and sunny where you are located doesn't guarantee an on-time delivery. Delivery dates provided by the carriers may also be missed due to extremely high package volume. In some cases there too many boxes for one delivery truck to hold. As much as we would like to be able to offer a delivery date guarantee we can't. Please understand that if you place your order by our listed cutoff time and date we will do our absolute best to ensure it ships promptly and arrives before December 25. Please note that outbound shipments will also be delayed on all orders placed on or after December 25th through January 1. PerformanceLifts.com and the shipping companies observed these Holidays and no shipments can be processed.
For more information on the PerformanceLifts.com shipping policies please visit our customer service page located here: Shipping & Delivery or call us at (949) 629-3017
General Motors has made minor changes to the suspension on the 2014 model year Chevrolet Silverado 1500 and GMC Sierra 1500 series trucks. The Leveling Kits designed for use on the 2007-2013 models will in most cases also fit the 2014 just fine. The complete Suspension Lift Kits however now fall under two different fitment categories: Steel Suspension and Aluminum Suspension. In order to purchase the correct suspension lift for your new Silverado or Sierra you need to know which front suspension type your truck has. The easiest way to do this is to look at the color of the front suspension components. If your control arms are Black there is a very good chance the control arms are STEEL. If the control arms are Silver the arms are Aluminum. One way to verify the material type is to perform the old magnet test.... a magnet will stick to steel but it will NOT stick to Aluminum. Please note that most Suspension Lifts are now specific to the suspension material type. If you purchase the wrong kit for your truck it won't fit!
Here are a few suspension lifts that we currently offer for the new 2014 Silverado and Sierra Trucks:
We are adding additional 2014 Silverado and Sierra 2wd and 4x4 parts and accessories as the manufacturers release them. If you are looking for a specific product that is not currently available via the website please contact us.
Telephone: (949) 629-3017
I am interested in the 4" CST lift for a 2011 Silverado Crew Cab 4WD. I am interested in using either the Fuel Off Road "Throttle" (17x9)or(18x9).. or the KMC XD Series "SPY" (17x8) or (18x8) with a 295/70/17 tire. I know I need a 5"-5.5" backspacing but which one is recommended for the 8" wide wheel and the 9" wide wheel...5 or 5.5? Thanks!
Keep in mind that regardless of the wheel width the back space remains a constant. As you increase wheel diameter (say from 17" to 18") you can generally run a wheel with more back space. If you wanted to run an 18" wheel our pick would be the 18x8 with 5.5" inches of back space.
The CST recommended backspace requirement is the same for either wheel width. The reason CST specifies a backspace requirement and not an offset is because backspace is constant regardless of wheel width. CST's concern is a wheel with too much backspace could allow a larger than stock tire to rub the CST steering knuckle and possibly the upper control arm. CST prefers that customers run a wheel with less backspace as this provides an increase in clearance between the tire sidewall and the suspension components. Less wheel backspace = more clearance between the tire and the suspension. More wheel backspace = less clearance between the wheel and the suspension and this can cause possible rubbing issues. Looking at the chart below... you can see how a wheel with the same offset but different widths will have a different backspace. This is why suspension lift manufacturers will specify a backspace requirement and not an offset requirement.
An 18x8" wheel with 5" of back space and a 18x9" wheel with 5" of backspace will both have 5" inches of backspace. In this case both the 18x8 and 18x9 wheel should clear the CST suspension lift components when running a 295 series tire just fine.
Running a wheel with more backspace will keeps the tires tucked in closer to the centerline of the truck. Wheels with less backspace will push the tire/wheel out and in most cases the farther the tire/wheel sticks out the more likely it is to rub when turning. An 18x9 wheel with 5" of back space will stick out farther by 1" over the 18x8" wheel with 5" of back space. If you want a narrower stance that keeps the tire inside the fender opening you will want the narrower 8" wheel with 5.5" of back space. The 18x8 5.5" wheel would be our first preference. If you prefer a slightly wider stance we would still recommend the use of a narrower 8" wheel but with slightly less back space.
Pro Comp is proud to announce the availability of 6″ suspension systems for 2012-13 Ram 1500 4WD trucks! These systems have been engineered to deliver improved performance and driveability. New CNC machined knuckles and redesigned crossmembers improve geometry for minimal toe change during suspension travel and deliver increased tread life. Systems can be ordered with several shock options and are 100% compatible with the factory electronic stability program. Please note that this lift will NOT fit any Ram 1500 4x4 equipped with the Factory AIR RIDE System!
Tire Size Information:
Pro Comp has very specific tire and wheel recommendations for use with this 6" Suspension Lift. 18” OR LARGER DIAMETER WHEELS WITH A MAXIMUM 5.00” BACKS SPACE MUST BE USED IN CONJUNCTION WITH THIS LIFT KIT! Due to differences in manufacturing, dimensions and inflated measurements, tire and wheel combinations should be test fit prior to installation. Tire and wheel choice is crucial in assuring proper fit, performance, and the safety of a Pro Comp suspension lift equipped vehicle. For the 2012 & 2013 Ram 1500 4x4 Pro Comp recommends a minimum of an 18” wheel not to exceed 9.00” in width with a maximum back space of 5.00”. Pro Comp recommends not exceeding use of a 35” tall X 12.50” wide tire. Please note this kit can clear up to a 37” X 12.50” tire, but running 37" tires will require trimming of the front valence and rear lower portion of the inner fender. Installation of up to a 20x9” wheel, with a maximum back space of 5.00”, is also possible. Be sure to check fit all wheel and tire combinations before purchasing and installation. Violation of these recommendations will not be endorsed as acceptable by Pro Comp Suspension.
For more information on this or any other Explorer Pro Comp suspension product please click on the ASK A QUESTION link located at the very top of this page.
A question that has been asked frequently is what is the difference between the CST 4" Cast Iron Lift Spindle (CSS-D1-5) and the CST 4" Fabricated Steel Lift Spindle (CSS-D1-1)??? The obvious answer is the two different material types each is produced from. There are however a number of other differences that might make one a better choice than the other. If you are already tired of reading and want the quick version... the CST Fabricated Steel version is better in every way except one, it has a higher price.
Strength & Weight:
In this application Plate Steel is stronger pound for pound than Cast Iron. In order for CST to ensure that the Cast Iron spindle is strong enough (much stronger than the factory part it replaces) more material must be used. This extra material produces a heavier part. The CST Cast Iron Spindle is indeed heavier than the Fabricated Steel version. What effect does weight have on performance? More un-sprung weight generally hurts suspension performance, so lighter is better. On this type of application (a fullsize truck) the additional un-sprung weight isn't that noticeable behind the wheel but in theory less weight is better. We are only talking a few pounds difference between the two spindles but if you are trying to keep your truck on a strict diet (don't laugh) the Fabricated version is lighter in weight and every bit as strong.
Strength / Field Repairs:
The 1018 Plate Steel that CST uses to build their Fabricated Steel spindles has more "give" than a Cast Iron part. And in an emergency the Fabricated Steel spindle can be welded. What type of emergency you ask? Imagine you are one of our customers down in Baja (Mexico) and you are 100 miles from nowhere and you hit a big rock with your truck and you somehow manage to damage the CST 4" Spindle. If something is bent or torn it could be welded back together to "limp" the truck home or out of the desert. If the Cast Iron spindle is damaged it will require replacement. This is of no interest to 99% of our customers because by the time you've hit something hard enough to damage a CST Spindle (either version) the rest of the factory suspension is probably ruined too. But for some customers being able to repair the parts in the field is worth the additional expense. In our opinion this is pretty far fetched but again the advantage goes to the Fabricated Steel spindle.
Track Width Increase:
The Fabricated Steel spindle (CSS-D1-1) increases the front track width by approximately 1/2" inch on each side. The Cast Iron spindle (CSS-D1-5) increases the front track width by approximately 3/4" inch on each side. If you want the narrowest possible stance the Fabricated Steel spindle is the better option. If you want to increase the stance of your Ram (wider stance) the Cast Iron spindle is the better option. Keep in mind if you run an aftermarket wheel with less back space than the factory Ram wheel that will also increase the front track width. It is entirely possible to end up widening the front track width by 3" to 4" with aftermarket wheels.
Factory Wheel Clearance:
Neither the CST Fabricated Steel or CST Cast Iron spindle will work with factory 17" diameter wheels. The only way you can retain the 17" wheels and use these spindles is with a .500" or thicker wheel spacer. Both CST 4" Lift Spindles will work with the factory 20" diameter wheels (no wheel spacer required) and tire sizes up to 305 series or 12.00" inches in width. A 35x12.50 tire will technically work on the factory 20" wheel but the tire sidewall is so close to the upper portion of the CST Spindle that we do NOT recommend it. Installation of a .250" thick spacer can provide the additional clearance. If you want to run a 17" wheel we recommend an aftermarket wheel that has no more than 5.00" inches of back space. From what we have seen the Fabricated spindle provides a slight clearance advantage so if you are trying to run a wheel with the maximum allowable back space the Fabricated Steel spindle has a very small (possibly 1/8") advantage.
Suspension Lift Height:
Both the CST Fabricated Steel and Cast Iron spindle provide the same 4" inches of lift. This is a wash. Neither spindle has an advantage here.
So Which Should You Choose?
If you want the very best and can afford to pay for it the CST Fabricated Steel 4" Lift Spindle # CSS-D1-1 is the better of the two options. At $200.00 more expensive the Fabricated Steel offers benefits and features that 99% of our customers don't need. That's right, we said DO NOT need. The Cast Iron version is still stronger than the factory Ram parts they replace. If you are worried the Cast Iron spindles aren't strong enough, don't be. CST has 100's of sets in use and zero failures to date. If you do somehow manage to damage a CST Cast Iron Spindle the rest of your Ram's suspension has probably been destroyed too. If you are going to jump your truck and act like a Hooligan behind the wheel with no regard to your trucks well-being the Fabricated Steel spindle would be the better choice. In terms of sales, now that CST offers two different spindle versions we sell 15 sets of the Cast Iron Spindle for every 1 set of the Fabricated Steel Spindle. By saving $200.00 on the spindle purchase our customers are in some cases able to purchase aftermarket shocks or some other suspension upgrade they normally would not able to afford. A Ram 1500 2wd with the Cast Iron 4" Spindle and a set of Bilstein 4600 Series front shock absorbers installed generally rides better on and off-road than a Ram 1500 with the Fabricated Steel 4" Spindle and the factory shocks. For the majority of our customers the less expensive Cast Iron Spindle # CSS-D1-5 is the better choice because it's less expensive and still provides great looks and performance.
If you have any questions about the CST 4" Lift Spindles for your 2002-2014 Ram 1500 2wd we'd love to hear them. If you have a PerformanceLifts.com account you can Login and reply directly via this page. If you don't have an account but would like to contact us, please click on the "ASK A QUESTION" link located at the very top of this page. Or you can reach us by telephone at (949) 629-3017 or e-mail: Sales@PerformanceLifts.com
ICON Vehicle Dynamics has been busy equipping this 2014 Toyota Tundra with their top shelf products, including CDCV equipped front and rear reservoir shocks. The ICON Toyota Tundra Stage 6 System # K53026 installed on this Tundra will be on display at the 2013 SEMA Show in Las Vegas. The same kit shown here will fit all 2007-2014 2wd & 4x4 models. ICON has verified that their complete line of 2007+ Toyota Tundra products will also fit the revised 2014 model year trucks. To purchase this Stage 6 Suspension System Click here: ICON 2007+ Toyota Tundra Stage 6 System # K53026
The ICON CDCV equipped shocks feature an adjustable compression damping system that is easily adjusted by hand. The ICON CDC Valve is an externally adjustable valve that restricts oil flow into the reservoir creating 10 levels of compression damping force ranges. Controlling the amount of oil flow externally allows you to adjust the shock damping for varying terrain or driving styles. Each setting provides a noticeable difference in how the Tundra responds to the road surface (or lack of). This design allows you to select either a softer or firmer ride. Another advantage of the ICON CDCV system is that it allows for lower reservoir pressures than a non CDCV equipped shock. By lowering the reservoir pressure it decreases seal friction which helps improve compliance over small holes or bumps commonly found on poorly paved roads.
ICON Stage 6 Contents:
ICON 58650RC - 2007+ Toyota Tundra CDC Equipped Coilovers
ICON 59920C - 2007+ Toyota Tundra CDC Equipped Rear Shocks
ICON 58560 - 2007+ Toyota Tundra Billet Aluminum Upper Arm
ICON 51200 - 2007+ Toyota Tundra Rear Leaf Expansion Pack
ICON Vehicle Dynamics is a performance engineered suspension manufacturer specializing in aftermarket components for trucks, SUV’s, and off road vehicles. The company’s business is customer focused and engineering driven. World-class manufacturing processes and techniques provide our customers a robust, quality product with superior value. If you would like more information about this or any other ICON Vehicle Dynamics product for your Toyota Tundra please click here "Ask A Question" or Login and submit a comment below.
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