SDI
SDI Steering Knuckles, Hubs, and Suspension Parts at JJ Motorsports
SDI is a specialized brand in the powersports industry, focusing on heavy-duty steering and suspension components for UTVs such as Polaris RZR, Can-Am Maverick, Talon, and Commander. Emphasizing superior strength, lightweight designs, and race-proven performance, SDI products replace weak stock parts to improve safety, handling, and durability in off-road and racing environments.
At JJ Motorsports, we offer a wide range of SDI products, including the race-proven Steering Knuckle - Race Edition for reduced bump steer, the lightweight Heavy Duty Front Hub for Polaris RZR to minimize rotating mass, the adjustable Tie Rods for Talon R with flats for easy tuning, the modular Radius Rods - 64" for enhanced strength, the flexible Accessory Mount Clamp that rotates on impact, and the rigid Motor Mount for Polaris to reduce flex and wear. Whether you're prepping for races or rugged trails, SDI delivers reliable upgrades compatible with major UTV brands. Explore our selection to find the perfect additions for your vehicle.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-SH50
SDI
$19.95Stock piston rings shed their wear band rapidly, often within the first five hours of operation, causing unpredictable low-speed damping and performance loss. The SDI DU Piston Bushing Conversion Kit...04500617- SKU:
- 04500617
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 36 mm DRPBK-WP36
SDI
$19.95Stock piston wear bands degrade rapidly, causing inconsistent damping within the first five hours of operation and compromising your suspension's performance throughout the oil's service life. The...04500618- SKU:
- 04500618
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 46 mm DRPBK-WP46XPL
SDI
$19.95Stock piston rings wear dramatically within the first five hours of operation, degrading low-speed damping and compromising suspension consistency when you need it most. This DU Piston Bushing...04500619- SKU:
- 04500619
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP50
SDI
$19.95Stock wear bands degrade rapidly under damping loads, causing inconsistent performance and accelerated component wear within the first five hours of operation. The SDI DU Piston Bushing Conversion...04500620- SKU:
- 04500620
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP5016
SDI
$19.95Stock piston wear bands degrade rapidly, causing inconsistent damping and unpredictable handling within the first five hours of operation. The SDI DU Piston Bushing Conversion Kit eliminates this...04500621- SKU:
- 04500621
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP50PDS
SDI
$19.95Stock piston wear bands typically degrade within the first five hours of use, compromising damping consistency and forcing premature rebuilds. The SDI DU Piston Bushing Conversion Kit replaces this...04500622- SKU:
- 04500622
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 40 mm DRPBK-KYB40
SDI
$19.95Stock piston rings wear rapidly during initial operation, compromising your damper's low-speed performance within just five hours of use. The SDI DU Piston Bushing Conversion Kit replaces that stock...04500623- SKU:
- 04500623
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95 -
On Sale
SDI Fork Service Kit - 43 mm KFSK43
SDI
MSRP: $79.95Now: $51.00Was: $79.95Proper fork maintenance directly impacts suspension responsiveness, damping consistency, and overall ride quality—neglecting service leads to performance degradation and premature wear. The SDI Fork...04500625- SKU:
- 04500625
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
MSRP: $79.95Now: $51.00Was: $79.95Qty in Cart: 0Quantity:Price:MSRP: $79.95Now: $51.00Was: $79.95Subtotal: -
SDI Fork Service Kit - 46 mm KFSK46
SDI
$79.95Proper fork maintenance is critical to preserving your suspension's responsiveness, damping characteristics, and structural integrity—especially if you're pushing performance limits on track or trail...04500626- SKU:
- 04500626
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$79.95 -
SDI Fork Service Kit - 48 mm KSFK48
SDI
$89.95A properly serviced fork is the foundation of responsive handling and rider confidence. This complete service kit eliminates the guesswork—no hunting for individual seals, fluids, or wear components...04500627- SKU:
- 04500627
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$89.95 -
SDI Fork Service Kit - 37 mm SFSK37
SDI
$74.95Proper fork maintenance is non-negotiable for suspension performance and rider safety. This complete service kit eliminates the guesswork by providing every seal, fluid, and component needed to...04500628- SKU:
- 04500628
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
$74.95 -
SDI Fork Service Kit - 47 mm SFSK47
SDI
$74.95Proper fork maintenance is critical to maintaining responsive handling and consistent performance on the track or trail. The SDI Fork Service Kit - 47 mm delivers all the seals, bushings, and...04500629- SKU:
- 04500629
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$74.95 -
SDI Fork Service Kit - 48 mm SFSK48
SDI
$79.95A properly serviced fork is the foundation of consistent suspension performance and rider safety. This comprehensive kit eliminates the guesswork by providing all the essential components needed for...04500630- SKU:
- 04500630
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$79.95 -
SDI Fork Service Kit - 43 mm WFSK43-AER
SDI
$114.95Fork maintenance directly impacts suspension responsiveness, damping consistency, and overall ride quality—neglecting service intervals accelerates wear on seals and internal components. The SDI Fork...04500635- SKU:
- 04500635
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
$114.95Qty in Cart: 0Quantity:Price:$114.95Subtotal: -
SDI Fork Service Kit - 48 mm WFSK48
SDI
$133.95Regular fork service is critical to maintaining consistent suspension performance and preventing premature wear on seals, bushings, and internal components. The SDI Fork Service Kit - 48 mm includes...04500636- SKU:
- 04500636
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$133.95Qty in Cart: 0Quantity:Price:$133.95Subtotal: -
SDI Linkage Arm - Blue SDECLAK16-BLU
SDI
$449.95If you're running a stock linkage arm, you're compromising both handling and comfort. The SDI Linkage Arm eliminates front-to-back rocking under acceleration while maintaining responsive feedback...13020707- SKU:
- 13020707
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
$449.95 -
SDI Linkage Arm - Black SDECLAY10-B
SDI
$449.95If you're experiencing front-end instability or harsh bottoming through the suspension, the SDI Linkage Arm directly addresses these handling issues by stiffening the initial suspension curve and...13020709- SKU:
- 13020709
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
$449.95Qty in Cart: 0Quantity:Price:$449.95Subtotal: -
On Sale
SDI Linkage Arm - Black SDECLAY18-B
SDI
MSRP: $449.95Now: $288.00Was: $449.95If you're experiencing front-to-back movement or harsh bottoming during aggressive riding, the SDI Linkage Arm addresses both issues by stiffening your initial suspension curve and smoothing out...13020711- SKU:
- 13020711
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
MSRP: $449.95Now: $288.00Was: $449.95Qty in Cart: 0Quantity:Price:MSRP: $449.95Now: $288.00Was: $449.95Subtotal: -
SDI Linkage Arm - Blue SDECLAY18-BLU
SDI
$449.95If you're experiencing excessive front-to-back movement or harshness in deep compressions, the SDI Linkage Arm directly addresses these handling compromises by stiffening the initial curve of your...13020712- SKU:
- 13020712
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
$449.95 -
SDI Lowering Pull Rod - Black SDECPRKT11-B
SDI
$219.95If you're running a lowering kit but still dealing with a mushy initial turn-in and excessive wallowing through corners, your suspension geometry needs refinement. The SDI Lowering Pull Rod...13041062- SKU:
- 13041062
- Availability:
- Ships Same Business Day
- Weight:
- 0.87 LBS
$219.95 -
SDI Lowering Pull Rod - Black SDECPRKT16-B
SDI
$219.95If your bike wallows through corners and harshes over bumps, your suspension geometry is working against you. The SDI Lowering Pull Rod corrects this by stiffening the initial suspension curve while...13041063- SKU:
- 13041063
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$219.95 -
SDI Lowering Pull Rod - Black SDECPRKX250-B
SDI
$219.95If you're experiencing vague mid-corner feel or harsh bottoming in your suspension, a quality lowering pull rod directly addresses both issues by improving chassis geometry and damping...13041064- SKU:
- 13041064
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
$219.95 -
SDI Lowering Pull Rod - Black SDECPRKX85L-B
SDI
$62.95If your bike feels wallowy under acceleration or harsh on deep compressions, a quality lowering pull rod transforms how your chassis responds. The SDI Lowering Pull Rod sharpens initial steering...13041065- SKU:
- 13041065
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
$62.95Qty in Cart: 0Quantity:Price:$62.95Subtotal: -
SDI Lowering Pull Rod - Blue SDECPRKX85SLBLU
SDI
$62.95If you're experiencing chassis wallowing mid-corner or harshness during aggressive trail braking, a precision lowering pull rod directly addresses both issues by stiffening your suspension's initial...13041067- SKU:
- 13041067
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
$62.95 -
SDI Lowering Pull Rod - Black SDECPRY10-B
SDI
$219.95If your suspension feels wallowing and imprecise during aggressive cornering, the SDI Lowering Pull Rod addresses the root cause by stiffening the initial suspension curve and reducing mid-stroke...13041068- SKU:
- 13041068
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$219.95 -
SDI Lowering Pull Rod - Black SDECPRKX85XL-B
SDI
$62.95If you're running a motorcycle that wallows through corners or harshes on deep compressions, a quality lowering pull rod transforms how your chassis responds. The SDI Lowering Pull Rod sharpens your...13041069- SKU:
- 13041069
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$62.95 -
SDI Lowering Pull Rod - Blue SDECPRY10-BLU
SDI
$219.95If you're experiencing wallowing through initial suspension compression or harsh bottoming in deep-stroke situations, the SDI Lowering Pull Rod directly addresses both issues by stiffening the...13041070- SKU:
- 13041070
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
$219.95Qty in Cart: 0Quantity:Price:$219.95Subtotal: -
On Sale
SDI Lowering Pull Rod - Black SDECPRY18-B
SDI
MSRP: $219.95Now: $141.00Was: $219.95If your suspension setup feels soft through corners or wallows under hard acceleration, a lowering pull rod transforms your chassis dynamics by stiffening the initial curve of your suspension while...13041071- SKU:
- 13041071
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
MSRP: $219.95Now: $141.00Was: $219.95 -
On Sale
SDI Lowering Pull Rod - Blue SDECPRY15-BLU
SDI
MSRP: $219.95Now: $141.00Was: $219.95If you're running a motorcycle that wallows through corners or harshes over deep bumps, your suspension geometry is working against you. The SDI Lowering Pull Rod fine-tunes your bike's chassis...13041072- SKU:
- 13041072
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
MSRP: $219.95Now: $141.00Was: $219.95 -
On Sale
SDI Bladder Cap - Blue SDESBC52BLU-L
SDI
MSRP: $62.95Now: $40.00Was: $62.95Shock performance hinges on consistent damping characteristics, and a larger bladder cap directly improves this by increasing internal volume and promoting a more linear pressure curve throughout the...13140701- SKU:
- 13140701
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $62.95Now: $40.00Was: $62.95Qty in Cart: 0Quantity:Price:MSRP: $62.95Now: $40.00Was: $62.95Subtotal: -
SDI Bladder Cap - Blue SDESBC52BLU-S
SDI
$66.95If you're running performance shocks, the SDI Bladder Cap directly impacts how your suspension behaves under load. By increasing shock volume, this precision-machined cap delivers a more linear,...13140702- SKU:
- 13140702
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$66.95 -
SDI Bladder Cap - Blue SDESBCAKT11-BLU
SDI
$136.95If you're running a stock OEM floating piston setup, you're dealing with unnecessary friction that degrades shock performance over time. The SDI Bladder Cap converts your suspension to a conventional...13140709- SKU:
- 13140709
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$136.95 -
SDI Bladder Cap - Orange SDESBCAKT11-ORG
SDI
$143.95If you're running a stock OEM floating piston accumulator, you're dealing with unnecessary friction and inconsistent damping that degrades shock performance over time. The SDI Bladder Cap converts...13140710- SKU:
- 13140710
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$143.95Qty in Cart: 0Quantity:Price:$143.95Subtotal: -
SDI Bladder Cap - Blue SDESBCAKT17-BLU
SDI
$143.95If you're running a stock floating piston accumulator, you're dealing with unnecessary friction and inconsistent damping that degrades shock performance over time. The SDI Bladder Cap converts your...13140715- SKU:
- 13140715
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
$143.95 -
SDI Bladder Cap - Black SDESBCH09B
SDI
$59.95If you're running a performance suspension setup, shock fluid temperature directly impacts damping consistency and longevity. The SDI Bladder Cap increases your shock's internal volume, delivering a...13140717- SKU:
- 13140717
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$59.95 -
SDI Bladder Cap - Black SDESBCH17B
SDI
$59.95If you're running a performance shock setup, your bladder cap is doing critical work—and an undersized or worn unit will compromise both feel and longevity. The SDI Bladder Cap increases usable...13140721- SKU:
- 13140721
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$59.95 -
SDI Bladder Cap - Red SDESBCH17R
SDI
$59.95If you're running a shock-dependent suspension setup, shock volume directly impacts your damping characteristics and thermal stability under sustained racing conditions. The SDI Bladder Cap increases...13140722- SKU:
- 13140722
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$59.95 -
On Sale
SDI Bladder Cap - Black SDESBCH250B
SDI
MSRP: $59.95Now: $38.00Was: $59.95Bladder caps are essential upgrades for any serious shock setup, directly impacting how your suspension responds under load. This precision-machined cap increases effective shock volume, delivering a...13140723- SKU:
- 13140723
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
MSRP: $59.95Now: $38.00Was: $59.95 -
On Sale
SDI Bladder Cap - Gray SDESBCH250G
SDI
MSRP: $59.95Now: $38.00Was: $59.95If you're running a performance shock setup, volume matters—and the SDI Bladder Cap directly impacts how your suspension feels on track. By increasing internal volume, this cap delivers a more linear...13140724- SKU:
- 13140724
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
MSRP: $59.95Now: $38.00Was: $59.95 -
SDI Bladder Cap - Black SDESBCK19-S
SDI
$62.95Shock performance depends on maintaining consistent damping characteristics and operating temperature—two areas where reservoir volume and thermal management make measurable differences. The SDI...13140726- SKU:
- 13140726
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$62.95
