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!
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- Qty in Cart
- Quantity
- Price
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SDI Bladder Cap - Blue SDESBCK19-BLU
SDI
$59.95If you're running coilovers or high-performance shocks, shock volume directly impacts your suspension's ability to handle sustained track sessions and aggressive driving. The SDI Bladder Cap...13140727- SKU:
- 13140727
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$59.95Qty in Cart: 0Quantity:Price:$59.95Subtotal: -
SDI Bladder Cap - Black SDESBCY18-B
SDI
$61.95If you're running a performance suspension setup, shock bladder volume directly impacts your damper's ability to maintain consistent oil temperature and deliver predictable ride quality under...13140730- SKU:
- 13140730
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$61.95 -
SDI Bladder Cap - Blue SDESBCY18-BLU
SDI
$62.95Bladder caps are critical for maximizing shock performance, especially in high-demand racing and off-road applications. This SDI unit increases shock volume while delivering a more linear,...13140731- SKU:
- 13140731
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$62.95 -
SDI Adjuster Spring - High Speed - Long SDEHSAL
SDI
$33.95Square-edge bumps and abrupt track transitions can introduce unwanted suspension spike, throwing off your setup balance and compromising driver feedback. The SDI Adjuster Spring – High Speed – Long...13140732- SKU:
- 13140732
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal: -
SDI Adjuster Spring - High Speed - Short SDEHSAS
SDI
$33.95Precision suspension tuning demands components that respond instantly to track conditions without introducing harshness into your chassis. The SDI Adjuster Spring – High Speed – Short delivers...13140733- SKU:
- 13140733
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$33.95 -
SDI Shock Check Valve - M12 x 1.25 SDESCV125
SDI
$61.95Precise damping control separates a competitive setup from a mediocre one. The SDI Shock Check Valve adds low-speed compression control without sacrificing high-speed responsiveness, giving you the...13140734- SKU:
- 13140734
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$61.95Qty in Cart: 0Quantity:Price:$61.95Subtotal: -
SDI Shock Check Valve - M12 x 1.50 SDESCV150
SDI
$61.95Fine-tuning your suspension's damping characteristics requires precision control at low speeds—this is where a quality check valve becomes essential. The SDI Shock Check Valve adds a secondary flow...13140735- SKU:
- 13140735
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$61.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 1 mm SDERCW-1
SDI
$14.95A 1 mm reduction in ride height can dramatically improve your bike's handling characteristics, especially through corners where geometry plays a critical role in grip and stability. This...13140736- SKU:
- 13140736
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$14.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 2 mm SDERCW-2
SDI
$14.95Fine-tuning your vehicle's ride height is essential for optimizing handling geometry, clearance, and overall performance. This SDI shock lowering stop washer delivers precise 2mm rear suspension...13140737- SKU:
- 13140737
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal: -
SDI Shock Lowering Stop Washer - Rear - Lowers 3 mm SDERCW-3
SDI
$14.95Lowering your bike's ride height doesn't require permanent modifications or costly suspension work. The SDI Shock Lowering Stop Washer delivers a simple 3 mm drop through precision-machined chromoly...13140738- SKU:
- 13140738
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$14.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 1 mm SDERLWK16-1
SDI
$24.95If you're looking to fine-tune your bike's geometry for better cornering performance or a more aggressive stance, a 1 mm rear ride-height reduction makes a measurable difference in handling dynamics...13140739- SKU:
- 13140739
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$24.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 2 mm SDERLWK16-2
SDI
$24.95If you're looking to dial in your bike's geometry without committing to expensive suspension overhauls, lowering stop washers are the simplest path forward. This 2mm rear lowering solution adjusts...13140740- SKU:
- 13140740
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$24.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 3 mm SDERLWK16-3
SDI
$24.95Lowering your bike's rear suspension by 3 mm sharpens handling response and improves weight distribution for better cornering stability. This simple adjustment reduces the rear ride height without...13140741- SKU:
- 13140741
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$24.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 9 mm SDERWK16-9
SDI
$26.95Lowering your motorcycle's rear end doesn't require expensive suspension rebuilds or permanent modifications. The SDI Shock Lowering Stop Washer delivers a quick, reversible 9 mm drop by simply...13140742- SKU:
- 13140742
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$26.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 2 mm SDERLWXPL-2
SDI
$20.95Lowering your bike's ride height doesn't require cutting, welding, or permanent modifications—the SDI Shock Lowering Stop Washer delivers a straightforward 2mm drop with a simple bolt-on installation...13140743- SKU:
- 13140743
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$20.95 -
SDI Shock Lowering Stop Washer - Rear - Lowers 6.5 mm SDERLWXPL-6.5
SDI
$21.95Lowering your bike's rear end doesn't require extensive fabrication or permanent modifications—the SDI Shock Lowering Stop Washer delivers a straightforward 6.5 mm drop with a simple bolt-on...13140744- SKU:
- 13140744
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$21.95 -
SDI Schrader Valve Assembly - Heat Resistance DRAVASS-HR
SDI
$9.95High-temperature racing environments demand valve components that won't fail under extreme pressure and heat cycles. The SDI Schrader Valve Assembly with heat-resistant construction ensures reliable...13140746- SKU:
- 13140746
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$9.95 -
SDI Schrader Valve Assembly - Long Brass Air (For Showa forks) DRAVASS-SHOWA
SDI
$9.95Maintaining proper air pressure in your Showa fork suspension is critical for consistent handling, ride quality, and performance on the track or trail. This genuine SDI Schrader Valve Assembly...13140747- SKU:
- 13140747
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
SDI Schrader Valve Assembly - Standard DRAVAAA-STD
SDI
$9.95A reliable Schrader valve assembly is critical for maintaining proper tire pressure and fuel system integrity across your vehicles. Whether you're running a daily driver or a track car, a quality...13140748- SKU:
- 13140748
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$9.95 -
SDI Schrader Valve Assembly - Long Brass Air (For WP forks) DRAVAAA-WPD
SDI
$9.95Maintaining proper tire pressure in your WP fork suspension is critical for consistent handling, reduced tire wear, and optimal damping performance. This genuine SDI Schrader valve assembly delivers...13140749- SKU:
- 13140749
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$9.95 -
SDI Showa Bladder Cap SRBLH05
SDI
$24.95If you're running a high-performance suspension system with Showa dampers, maintaining proper bladder cap function is critical to consistent ride quality and damper longevity. The SDI Showa Bladder...13140750- SKU:
- 13140750
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$24.95 -
SDI Showa Bladder Cap SRBLH105
SDI
$21.95The SDI Showa Bladder Cap SRBLH105 is an essential maintenance component for SDI Showa suspension systems, designed to maintain consistent pressure and prevent fluid loss during intense track...13140751- SKU:
- 13140751
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$21.95 -
SDI Showa Bladder Cap SRBLH17
SDI
$20.95Showa suspension systems demand precision components that maintain consistent damping performance under extreme conditions. The SDI Showa Bladder Cap SRBLH17 is a direct replacement that restores...13140752- SKU:
- 13140752
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$20.95 -
SDI Showa Bladder Cap SRBLK072
SDI
$18.95The SDI Showa Bladder Cap SRBLK072 is engineered to maintain optimal pressure integrity in high-performance suspension systems, preventing fluid loss and performance degradation during aggressive...13140753- SKU:
- 13140753
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$18.95 -
SDI Showa Bladder Cap SRBLK19
SDI
$17.95The SDI Showa Bladder Cap SRBLK19 is essential for maintaining optimal suspension performance and preventing fluid contamination in your shock absorber system. This OEM-quality replacement ensures...13140754- SKU:
- 13140754
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$17.95Qty in Cart: 0Quantity:Price:$17.95Subtotal: -
SDI Showa Bladder Cap SRBLS05
SDI
$24.95A quality bladder cap is critical to maintaining system integrity and preventing fluid loss during high-demand racing or track use. The SDI Showa Bladder Cap SRBLS05 delivers a secure, leak-proof...13140755- SKU:
- 13140755
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$24.95 -
SDI Showa Bladder Cap SRBLS18
SDI
$16.95If you're running a Showa coilover suspension system, the bladder cap is critical to maintaining consistent damping performance and preventing air infiltration that degrades ride quality. This...13140756- SKU:
- 13140756
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
$16.95 -
SDI Shock Reservoir Piston WRFP46-PDS
SDI
$6.95A properly functioning shock reservoir piston is critical to maintaining consistent damping performance and preventing aeration in your suspension system. The SDI Shock Reservoir Piston WRFP46-PDS is...13140757- SKU:
- 13140757
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
$6.95 -
SDI Floating Piston - O-Ring WRFPOR48-PDS
SDI
$1.95A floating piston design with precision O-ring sealing delivers superior pressure consistency across varying load conditions, critical for maintaining optimal brake or suspension performance under...13140758- SKU:
- 13140758
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$1.95 -
SDI Floating Piston - O-Ring - 50 mm WRFPOR50-16
SDI
$6.95A reliable floating piston seal is critical for maintaining consistent pressure and preventing costly fluid loss in high-performance hydraulic systems. The SDI Floating Piston with O-Ring design...13140760- SKU:
- 13140760
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$6.95 -
SDI Assembly Grease - 2 oz.net wt. SDOAG2OZ
SDI
$6.95High-performance assembly work demands a lubricant that won't break down under extreme pressure and heat. SDI Assembly Grease provides a durable, microscopic protective film that keeps critical...36070050- SKU:
- 36070050
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$6.95 -
SDI Super Slick Grease - 2 oz.net wt. SDPBG2OZ
SDI
$11.95Fork seals are critical contact points that determine your suspension's responsiveness and longevity. SDI Super Slick Grease is formulated specifically to reduce friction at fork seals while...36070052- SKU:
- 36070052
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
$11.95 -
On Sale
SDI Fork Oil - 5W - 1 U.S quart SDPF05-1QT
SDI
MSRP: $22.95Now: $15.00Was: $22.95Modern motorcycle forks demand a fork oil that can handle sustained heat cycles, precise damping control, and the aggressive demands of track and trail riding. SDI 5W Fork Oil is engineered...36090157- SKU:
- 36090157
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
MSRP: $22.95Now: $15.00Was: $22.95 -
SDI Shock Oil - 1 U.S quart SDPSO-1QT
SDI
$22.95Modern motorcycle and UTV suspensions demand oil that can withstand extreme pressures, rapid temperature swings, and thousands of compression cycles without breaking down. SDI Shock Oil delivers the...36090159- SKU:
- 36090159
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
$22.95 -
SDI Fork Cap - Adjuster Handle Set - Black SDM-2222008-B
SDI
$34.95Stock fork cap adjusters are prone to cracking under repeated use and offer poor tactile feedback when making critical suspension tuning adjustments. This CNC-machined aluminum handle replaces the...04040668- SKU:
- 04040668
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$34.95 -
SDI Fork Cap - Adjuster Handle Set - Orange SDM-0000008-O
SDI
$34.95Stock fork cap adjusters are prone to cracking under the stress of repeated adjustments, especially during race prep or aggressive tuning sessions. This CNC-machined aluminum handle replaces that...04040669- SKU:
- 04040669
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$34.95 -
SDI Linkage Shock Bladder Conversion Kit - Blue SDM-2222006-BLU
SDI
$143.95If you're running a linkage shock on your bike, you're dealing with friction penalties and consistency issues that a floating piston design simply can't overcome. This SDI conversion kit swaps your...13140788- SKU:
- 13140788
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$143.95Qty in Cart: 0Quantity:Price:$143.95Subtotal: -
SDI Linkage Shock Bladder Conversion Kit - Orange SDM-2222006-O
SDI
$143.95If you're running a linkage shock system, you're dealing with friction losses and inconsistent damping that compound over time. This SDI bladder conversion kit replaces your stock floating piston...13140790- SKU:
- 13140790
- Availability:
- Ships Same Business Day
- Weight:
- 0.73 LBS
$143.95 -
SDI Linkage Spring Nut - Factory Brown SDM-2222001-FB
SDI
$69.95The OEM plastic spring nut on your shock assembly is a known weak point—it cracks under load and compromises your suspension geometry. The SDI Linkage Spring Nut replaces that failure-prone plastic...13140792- SKU:
- 13140792
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$69.95Qty in Cart: 0Quantity:Price:$69.95Subtotal: -
SDI Linkage Spring Nut - Orange SDM-2222001-O
SDI
$69.95The OEM plastic spring nut on your shock absorber is a wear point that compounds damage over hard use—replacing it with the SDI Linkage Spring Nut eliminates that failure point and extends shock...13140793- SKU:
- 13140793
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$69.95
