Performance & Replacement Transmission & Drivetrain Parts

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

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All Balls Racing Hubs

The wheel hubs of your ATV or UTV are essential for smooth steering, safe braking, and overall stability. When you need to replace worn or damaged hubs, All Balls Racing offers many options to keep you rolling along. All Balls Racing wheel hubs offer the superior strength of high-quality steel for your ATV/UTV. They are produced to OEM specification for a perfect, hassle-free fit. Select the hub needed for your off-road machine.

Not Yet Reviewed

$78.95

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$99.67

All Balls Racing Wheel and Carrier Bearing Seal Kits

All Balls Racing wheel and carrier bearing seal kits are hands-down the most complete line of bearing seal kits on the market! They are available in a wide variety of powersports applications, from ATV and off-road to street bikes. These All Balls Racing wheel and carrier bearing seal kits have premium high-speed bearings that feature low-drag, double-lip seals on both sides to provide superior exclusion of water and dirt and improved grease retention. High performance Chevron SRI-II grease features special rust inhibitors for the most demanding applications. Type TC nitrile elastomer wheel seals are specifically designed to keep out water and dirt. Their rubber coated outside diameter helps to create an optimum seal at the hub.

4.45 out of 5 stars ( 20 )

$11.28

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$145.24

Pivot Works Wheel Bearing Kits

Restore control of your ATV, bike, or utility vehicle by changing that rusted or loose wheel bearing with Pivot Works wheel bearing kits. These kits have the versatility to fix the problem, regardless of where it lies. Made from OEM-grade materials for an exact fit and reliability, the Pivot Works wheel bearing kits are engineered to save you time and effort. The kits include all of the bearings that you need to repair one wheel. Some kits may include seals. Ride safer and improve your steering and braking with Pivot Works wheel bearing kits.

Not Yet Reviewed

$9.50

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$89.99

JOES Racing Products Wheel Hubs

JOES Racing Products wheel hubs are designed to increase the speed of your kart. Their quality finishes and concentric machining mean that you get top-notch hubs, and the sealed bearings provide smooth operation for added performance. Crafted from aluminum and black anodized, these wheel hubs use standard American bolt patterns for both 1/4 in.-28 and 5/16 in.-18 size wheel studs. They're available for both the front and rear of your kart and/or Quarter Midget racer. Order the hubs that best fit your application.

Not Yet Reviewed

$47.95

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$69.95

JOES Racing Products Hub Bearings

JOES Racing Products hub bearings replace your worn bearings. These replacements are the perfect fit for JOES hubs to keep you rolling smooth.

Not Yet Reviewed

$15.95

JOES Racing Products 5x5 Bearing Races

JOES Racing Products offers 5x5 bearing races as replacements that will work for both inner and outer applications. Select the quantity needed.

Not Yet Reviewed

$13.95

JOES Racing Products Kart/QM Front Hubs

JOES Kart/QM front hubs feature sealed roller bearings for reduced friction. The billet 6061-T6 aluminum kart hubs are precision-machined to roll true for more speed. Hubs are black anodized with laser etched graphics, and fit 5/8 in. spindles. These Kart/QM front hubs feature an American standard wheel bolt pattern for both 1/4 in.-28 and 5/16 in.-18 on 2.5 in. bolt circles. Equip your kart or quarter midget with the best front wheel hubs available—from JOES Racing Products!

Not Yet Reviewed

$47.95

JOES Racing Products Kart/QM Rear Hubs

JOES Kart/QM rear aluminum hubs are black anodized and laser-etched for a durable finish. They're precision-machined to roll truer than knock-offs. Use the short version or the long version to adjust your kart or quarter midget for the conditions. Concentric machining and quality finishes result in faster times. These rear hubs fit 1 1/4 in. axles, with sealed bearings providing smooth operation. Standard American bolt pattern for both (drilled/tapped) 1/4 in.-28 and 5/16 in.-18 on 2.5 in. bolt circles.

Not Yet Reviewed

$49.95

JOES Racing Products Wheel Hub Dust Caps

JOES Racing Products wheel hub dust caps are high-quality dust caps that are machined out of 6061-T6 aluminum. They require drilling and tapping in order to give them a perfect fit and finish on your ride. Drill and tap alignment kits are available separately.

5.0 out of 5 stars ( 1 )

$29.95

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$139.95

Quadboss Wheel and Carrier Bearing and Seal Kits

Quadboss wheel and carrier bearing seal kits offer all of the bearings and seals you require to re-fit a wheel. Kits include: * High-speed bearings manufactured to ABEC 3 precision levels * 8 triple-lip rubber seals keep grease in and water/dirt out * Double-lip type TC seals with stainless steel garter springs

5.0 out of 5 stars ( 1 )

$18.99

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$112.99

Quadboss Individual Wheel Bearings

Just need a bearing? Quadboss offers individual wheel bearings to satisfy your needs. Their high-speed bearings are manufactured to ABEC 3 precision levels.

Not Yet Reviewed

$7.99

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$23.99

Quadboss Rugged Axle Shafts

Stock shafts don't always hold up to the rigors of the trail. Quadboss rugged axle shafts are as good as or better than OEM parts. Direct replacement chromoly steel axle bars come fully assembled with three percent moly grease and are ready to install with stainless steel clamps. Nearly 200 models are available for fitment on countless UTV/ATV applications from the 1980s and up. Get your quad back on the trail and off-road with long-lasting quality at an outstanding price. Select the rugged axle shafts recommended for your off-road vehicle.

Not Yet Reviewed

$49.50

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$261.99

Sunstar Standard Steel Sprockets

Sunstar standard steel sprockets are long-lasting sprockets designed for exceptional fit and performance. They are constructed from 1045 high carbon steel with an exclusive heat treatment for added strength and durability. These sprockets also receive a special treatment to aid in resisting rust and corrosion. Sunstar has supplied the global market with the deepest range of sprocket options since 1946, and their standard steel sprockets are another example of their leading-edge design, testing, and technology. Always gear-up with Sunstar standard steel sprockets to maintain a top-performing bike.

3.67 out of 5 stars ( 3 )

$27.99

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$48.99

Sunstar Works Triplestar Aluminum Sprockets

Available for all racing applications, Sunstar Works Triplestar aluminum rear sprockets are the longest lasting aluminum rear sprockets available. They are manufactured from aerospace-grade 7075-T6 aluminum and are computer-designed with weight reduction holes for lightness and stability. Their exclusive tooth-valley design provides up to 50 percent more chain contact area than other aluminum sprocket brands and their hard anodized coating provides added durability and an eye-catching finish. Mark your calendar--the racing aftermarket segment has been changed forever, thanks to Sunstar Works Triplestar aluminum rear sprockets.

Not Yet Reviewed

$48.99

Pro-X Racing Parts Clutch Spring Kits

ProX heavy-duty clutch spring kits feature an approximately 10 percent stiffer design than OEM springs and will reduce clutch slippage under extreme conditions for maximum control and instant drive. They help ensure a positive clutch lockup, while also providing a high-performance feel and durability. Find out for yourself why Pro-X Racing Parts clutch spring kits are a top replacement option, especially for professional drivers, when you order the kit designed to fit your application. Other features, items, and specifications include: * Made from the toughest materials available * Pre-set, shot-peened, heat-treated, and designed to exceed OEM performance and durability * Sold in complete kits for each application * Full range of spring kits for MX and ATV models available from ready stock

Not Yet Reviewed

$22.99

Summit Bucks

Renthal R1 Works Drive Chains

Renthal R1 Works drive chains afford your dirt bike lightweight strength with maximum power transfer. These high-strength chains offer excellent impact load resistance to deal with the stress of motocross and off-road racing. They are non-O-ring and are available in 420, 428, and 520 pitch. These are the best chains for any sprocket, but match them with Renthal chainwheels and you'll experience pure power and precision at your rear wheel. The fact is, whether you're racing or weekend riding, you'll love Renthal R1 Works drive chains. Features and benefits: * Shot-peened alloy steel side plates * Chamfered inner links--reduce the chance of derailment * Extended bushings--reduce friction and maximize power output * Chromised bearing pins--excellent wear resistance * Gold color side plates--prevent corrosion

Not Yet Reviewed

$60.27

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$131.36

Summit Bucks

Renthal Ultralight Rear Sprockets

Renthal Ultralight rear sprockets will withstand the rigors of supercross, motocross, and enduro racing. Manufactured to extremely tight tolerances, they are 66 percent lighter than steel, and yet incredibly durable. Renthal uses computer-aided design, high-strength specially enhanced 7075 T-6 aluminum alloy, and CNC-machining to produce sprockets that are high-strength, hard-wearing, and offer the maximum reduction of unsprung weight at the rear wheel for maximum power transfer. They've also added self-cleaning mud grooves between every tooth on both sides to prevent dirt buildup. Shouldn't you choose the sprockets chosen by more factory race teams? Join a winning team and install Renthal Ultralight rear sprockets.

5.0 out of 5 stars ( 2 )

$43.16

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$89.84

Rekluse Clutch Friction Disc Kits

Rekluse Clutch friction disc kits are available in several sizes to service numerous dirt bike models. These sets will replace worn friction discs to ensure proper clutch engagement and the efficient transfer of power from the engine to the wheels. Select the Rekluse friction disc kit designed for your bike.

Not Yet Reviewed

$139.00

Motion Pro Sprocket Jammer Tools

Motion Pro Sprocket Jammer tools are must-haves for your bike toolbox. These patent pending pieces prevent rotation of chain and sprockets for easy removal or installation of counter shaft nut. They can be used to pull the rear wheel against chain blocks when tightening the rear axle. The Motion Pro Sprocket Jammer features CNC billet aluminum construction, a blue anodized finish, and laser etching for easy identification.

Not Yet Reviewed

$24.99

JOES Racing Products Micro Sprint Split Coned Axle Spacers

JOES Racing Products Micro Sprint split coned axle spacers are available in male, female, or as a set with additional spacers. The space set allows you to move the wheel in or out without searching for the right size spacer. Once you have your baseline spacing correct on your axle, simply move the existing spacers from the inside of the wheel to the center of the split cone or vice versa. Make changes quickly as all the spacers you need are already on the car. Wheel offset is changed in seconds without the need of fumbling around for the correct spacer. Choose the male or female split cone spacer, or the set that includes one of each along with four 1/4 in. spacers and one 1/2 in. spacer.

Not Yet Reviewed

$50.95

EBC CKF Carbon Fiber Lined MX Race Clutch Plate Sets

EBC CKF carbon fiber lined MX race clutch plate sets are built tough to last longer, grip better, feel better, and drive better than stock cork-based units. Plus, the high-heat ability of EBC CKF carbon fiber-lined MX race clutch plate sets handle much higher stresses and temperatures encountered in racing yet feel gentle and smooth in everyday riding. One day, all Motocross bikes and ATVs will be built using a clutch like this, but for now the only way to get the best clutch in the game is to step up to EBC CKF carbon fiber-lined MX race clutch plate sets.

Not Yet Reviewed

$167.93

All Balls Racing Differential Bearing and Seal Kits

All Balls Racing offers the most complete line of differential bearing and seal kits on the market! They're available for a wide range of ATVs from the 1980s and up. The kits feature premium high-speed bearings with low-drag, double-lip seals on both sides—to provide a superior exclusion of water and dirt, as well as improved grease retention. They contain everything that you need to rebuild a differential quickly and easily. Order the kit recommended for your application.

5.0 out of 5 stars ( 2 )

$155.01

Pro-X Racing Parts Clutch Rubber Dampers

Pro-X Racing Parts offers clutch rubber dampers for virtually any motorcycle brand. These durable OE replacement cushions are ideal when you're rebuilding a clutch basket. They're manufactured from factory materials and specs to ensure proper fit and performance. Why ride with a worn-out damper? Upgrade with an economical replacement from Pro-X Racing.

Not Yet Reviewed

$7.99

Pro-X Racing Parts Clutch Baskets

Pro-X Racing Parts clutch baskets are precision-machined from heat-treated aircraft 7075-T6 billet aluminum alloy to OE standards. Sophisticated hard-anodizing guarantees extended life under severest racing conditions. Each Pro-X kit comes with the necessary hardware to make installation a snap. Features of Pro-X Racing Parts clutch baskets: * Design—Pro-X clutch baskets are designed to maximize strength through "feature aligned grain flow" and utilizes as-forged features that can only be produced using their precision process. We are able to produce higher mechanical properties and resistance to impact and fatigue. * Hard anodized--all clutch baskets are hard-anodized to produce an ultra-tough, abrasive-resistant surface and ensures a long life of smooth clutch operation through the elimination of wear on the sides of the clutch basket tabs. * PTFE-coated--specially added coating creates a near frictionless surface for the clutch plate tabs to glide upon. All clutch baskets come with pre-applied thread locker fasteners and an Inbus tool.

Not Yet Reviewed

$234.99

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