Dirt Bike Rear Sprockets
Dirt Bike Rear Sprockets for Honda, KTM, Beta & Husqvarna: 42-51 Tooth Steel & Aluminum at JJ Motorsports
Customize your dirt bike's gearing for optimal acceleration or top speed with premium rear sprockets from JJ Motorsports, precision-machined for perfect chain fit, reduced weight, and extreme durability in motocross, enduro, and trail riding. Our selection includes high-tensile steel and lightweight aluminum sprockets in 42-51 tooth counts designed for smoother power transfer, less rotational mass, and customizable ratios to match terrain or riding style. Compatible with top models like Honda CRF, KTM SX/EXC, Beta RR, Husqvarna FC/FE, and more, these race-proven sprockets from trusted brands ensure minimal chain wear, reliable performance, and longevity in muddy, rocky, or high-speed conditions. From JT Sprockets' computer-optimized steel for OEM reliability to Renthal's ultralight aluminum for racing gains, dial in your final drive for tighter woods, faster tracks, or balanced trails with the ideal tooth count.
Shop brands like JT Sprockets, Moose Racing, and Renthal for world-class quality. Explore related categories such as dirt bike front sprockets for full gearing kits or dirt bike drive chains for complete drivetrain upgrades.
Top Dirt Bike Rear Sprockets
- JT Sprockets Steel Rear Sprocket Graphite 48 Tooth JTX251.48GR – 48-tooth hardened steel rear sprocket with graphite finish; computer-designed for perfect chain alignment and durability in off-road conditions.
- JT Sprockets Rear Sprocket Beta/Honda Red 51 Tooth JTA210.51RED – Lightweight aluminum 51-tooth sprocket in red anodized finish for Beta RR and Honda CRF models; reduces unsprung weight for better acceleration.
- Moose Offroad Steel Rear Sprocket 48 Tooth 1210-BET-48-STL – Heavy-duty steel 48-tooth sprocket for Beta models; heat-treated for extreme strength and wear resistance in aggressive off-road use.
- Renthal Rear Sprocket Aluminum 42 Tooth Gas Gas/Husaberg/Husqvarna/KTM 224U-520-42GPSI – Ultralight CNC-machined aluminum 42-tooth sprocket with gold finish; precision engineering for KTM, Husqvarna, and Gas Gas models, ideal for racing.
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
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On Sale
SUPERSPROX Rear Sprocket - Black - Kawasaki - 51-Tooth RAL-460-51-BLK
SUPERSPROX
MSRP: $69.95Now: $59.46Was: $69.95A worn or stock sprocket directly impacts your power delivery, acceleration response, and chain longevity. The SUPERSPROX Rear Sprocket delivers measurable gains in durability and performance through...12111946- SKU:
- 12111946
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- BLACK
- MODEL:
- ALUMINUM
- RIDING STYLE:
- STREET
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 51
MSRP: $69.95Now: $59.46Was: $69.95 -
On Sale
SUPERSPROX Rear Sprocket - Black - Kawasaki - 48-Tooth RAL-808-48-BLK
SUPERSPROX
MSRP: $69.95Now: $59.46Was: $69.95A rear sprocket is one of the most critical drivetrain components for chain wear and overall performance—and inferior aluminum can lead to premature tooth wear, increased maintenance costs, and power...12111948- SKU:
- 12111948
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- STREET
- MODEL:
- ALUMINUM
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
MSRP: $69.95Now: $59.46Was: $69.95Qty in Cart: 0Quantity:Price:MSRP: $69.95Now: $59.46Was: $69.95Subtotal: -
On Sale
SUPERSPROX Rear Sprocket - Black - Kawasaki - 50-Tooth RAL-808-50-BLK
SUPERSPROX
MSRP: $69.95Now: $59.46Was: $69.95A worn or suboptimal rear sprocket directly impacts acceleration, top-end speed, and chain longevity. The SUPERSPROX 50-tooth rear sprocket replaces OEM components with a precision-engineered upgrade...12111950- SKU:
- 12111950
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- MODEL:
- ALUMINUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
MSRP: $69.95Now: $59.46Was: $69.95 -
On Sale
SUPERSPROX Rear Sprocket - Orange - KTM/Husqvarna - 49-Tooth RAL-990-49-ORG
SUPERSPROX
MSRP: $69.95Now: $59.46Was: $69.95A lightweight rear sprocket is fundamental to maximizing your KTM or Husqvarna's acceleration and throttle response, especially in competitive riding where every fraction of a pound matters. The...12111955- SKU:
- 12111955
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- ORANGE
- MODEL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- RIDING STYLE:
- OFF-ROAD
MSRP: $69.95Now: $59.46Was: $69.95Qty in Cart: 0Quantity:Price:MSRP: $69.95Now: $59.46Was: $69.95Subtotal: -
On Sale
SUPERSPROX Rear Sprocket - Black - Kawasaki - 51-Tooth RAL-457-51-BLK
SUPERSPROX
MSRP: $64.95Now: $55.21Was: $64.95A worn or stock sprocket introduces drivetrain inefficiency and accelerates chain wear—costly problems that compound quickly on the track or trail. The SUPERSPROX 51-tooth rear sprocket delivers...12112059- SKU:
- 12112059
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 51
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MODEL:
- ALUMINUM
- MOUNTING POSITION:
- REAR
MSRP: $64.95Now: $55.21Was: $64.95 -
On Sale
Renthal 50-Tooth Rear Sprocket for Honda CR80R CR85R CRF150R 189U-420-50GRSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82A lightweight rear sprocket is essential for competitive performance on the track or trail—it directly reduces unsprung weight, improves throttle response, and extends chain life. The Renthal...R18950- SKU:
- R18950
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 420
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
MSRP: $99.82Now: $89.84Was: $99.82Qty in Cart: 0Quantity:Price:MSRP: $99.82Now: $89.84Was: $99.82Subtotal: -
On Sale
Renthal Ultralight Rear Sprocket 48T Blue 441U-428-48GPBU
RENTHAL
MSRP: $104.95Now: $94.15Was: $104.95If you're running a Husqvarna off-road machine and want measurable gains in acceleration and handling without compromising durability, this 48-tooth rear sprocket delivers exactly that. By shedding...12111724- SKU:
- 12111724
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- CHAIN SIZE:
- 428
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
MSRP: $104.95Now: $94.15Was: $104.95 -
On Sale
Renthal Ultralight Rear Sprocket 47T Silver 224U-520-47GPSI
RENTHAL
MSRP: $104.95Now: $89.84Was: $104.95Shaving weight off your KTM while maintaining durability is critical for competitive performance and trail handling. The Renthal Ultralight Rear Sprocket delivers that balance through 7075-T6...12110103- SKU:
- 12110103
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 47
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
MSRP: $104.95Now: $89.84Was: $104.95 -
On Sale
Renthal 46T Rear Sprocket 520 Chain Silver 150U-520-46GBSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82Shave nearly a pound off your bike while maintaining the rigidity needed for precise power delivery. The Renthal 46T delivers consistent acceleration across a wide RPM range, and its self-cleaning...R150A52046- SKU:
- R150A52046
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
MSRP: $99.82Now: $89.84Was: $99.82 -
On Sale
Renthal Ultralight Rear Sprocket 46T 420 Pitch Silver 192U-420-46GPSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82If you're running a KTM off-road machine, your sprocket choice directly impacts acceleration, top-end speed, and drivetrain longevity. The Renthal Ultralight 46T 420 Pitch sprocket delivers...R192U42046- SKU:
- R192U42046
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
MSRP: $99.82Now: $89.84Was: $99.82 -
On Sale
Renthal 47-Tooth Ultralight Rear Sprocket for KTM 65 SX 192U-420-47GPSI
RENTHAL
MSRP: $99.82Now: $89.84Was: $99.82Shaving unsprung weight off your KTM 65 SX directly improves acceleration, handling response, and rider control—especially critical in competitive off-road environments. The Renthal 47-tooth...R192U42047- SKU:
- R192U42047
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
MSRP: $99.82Now: $89.84Was: $99.82 -
On Sale
Renthal Rear Sprocket 52T Orange 224U-520-52GPOR
RENTHAL
MSRP: $104.95Now: $94.15Was: $104.95Unsprung weight is your enemy on the track and trail—every gram matters when you're demanding maximum acceleration and suspension response. The Renthal 52T rear sprocket cuts 66% of the mass compared...12112478- SKU:
- 12112478
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 52
MSRP: $104.95Now: $94.15Was: $104.95 -
On Sale
Renthal 50T Rear Sprocket Orange 428 Chain Husqvarna TC85 2014-2024 KTM 85 SX 2004-2021 441U-428-50GPOR
RENTHAL
MSRP: $104.95Now: $94.15Was: $104.95Shaving unsprung weight off your bike directly translates to quicker acceleration and sharper handling—exactly what you need when every tenth of a second matters. The Renthal 50T rear sprocket pairs...12112486- SKU:
- 12112486
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 50
MSRP: $104.95Now: $94.15Was: $104.95 -
On Sale
Renthal 46T Rear Sprocket Orange 520 Chain 441U-520-46GPOR
RENTHAL
MSRP: $97.95Now: $88.16Was: $97.95If you're running a 520 chain setup, your rear sprocket is directly responsible for power delivery, acceleration response, and overall drivetrain efficiency. The Renthal 46T in 7075-T6 aluminum...12112487- SKU:
- 12112487
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- UNITS:
- EACH
MSRP: $97.95Now: $88.16Was: $97.95Qty in Cart: 0Quantity:Price:MSRP: $97.95Now: $88.16Was: $97.95Subtotal: -
On Sale
Renthal Rear Sprocket 48T Orange 520 Chain 7075-T6 Aluminum 441U-520-48GPOR
RENTHAL
MSRP: $97.95Now: $88.16Was: $97.95Losing performance to excessive sprocket weight and mud buildup? The Renthal 48T rear sprocket delivers a measurable advantage: 66% lighter than steel alternatives while maintaining the durability...12112488- SKU:
- 12112488
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- TYPE:
- DRIVE
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
MSRP: $97.95Now: $88.16Was: $97.95Qty in Cart: 0Quantity:Price:MSRP: $97.95Now: $88.16Was: $97.95Subtotal: -
On Sale
Renthal Rear Sprocket 51T Blue 520 for Yamaha 150U-520-51GBBU
RENTHAL
MSRP: $104.95Now: $94.15Was: $104.95A lightweight rear sprocket is fundamental to unlocking better acceleration and throttle response on your Yamaha. The Renthal 51T trades unnecessary weight for CNC-machined precision, delivering...12110167- SKU:
- 12110167
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLUE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
MSRP: $104.95Now: $94.15Was: $104.95Qty in Cart: 0Quantity:Price:MSRP: $104.95Now: $94.15Was: $104.95Subtotal:
