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
-
Renthal 48-Tooth Rear Sprocket for Yamaha 520 Chain 150U-520-48GBSI
RENTHAL
$99.82Rotational mass directly impacts throttle response and acceleration—swap your heavy steel sprocket for Renthal's 7075-T6 aluminum design and feel the difference immediately. Built for mud-heavy terrain, the self-cleaning tooth grooves eliminate buildup...R150A52048- SKU:
- R150A52048
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 48
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
$99.82 -
Renthal 50-Tooth Rear Sprocket for Yamaha 150U-520-50GBSI
RENTHAL
$99.82If you're running a 50-tooth rear sprocket, you're optimizing for top-end acceleration and handling—and the RENTHAL 150U-520-50GBSI delivers exactly that without the weight penalty of steel. Built from 7075-T6 aluminum, this sprocket sheds roughly 66% of...R150A52050- SKU:
- R150A52050
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
$99.82 -
Renthal 49-Tooth Rear Sprocket for Honda CR125R CR250R CR500R CRF250R CRF450R 154U-520-49GRSI
RENTHAL
$99.82Shave nearly a pound off your Honda dirt bike while gaining measurable improvements in acceleration and handling. The Renthal 49-tooth rear sprocket delivers the weight reduction serious racers demand, paired with self-cleaning grooves that maintain...R15449- SKU:
- R15449
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- CHAIN SIZE:
- 520
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$99.82 -
Renthal 51-Tooth Ultralight Rear Sprocket for KTM 224U-520-51GPSI
RENTHAL
$99.82If you're running a 51-tooth rear sprocket, you're prioritizing top-end speed and efficiency on your KTM—but a steel sprocket will cost you performance through added rotational mass. The Renthal 51-Tooth Ultralight Rear Sprocket cuts that weight by 66%...R22451- SKU:
- R22451
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- DRIVE
$99.82 -
Renthal 48-Tooth Rear Sprocket for Kawasaki 112U-520-48GEBK
RENTHAL
$99.82If you're running a 520 chain on your Kawasaki, this 48-tooth rear sprocket is a direct bolt-on upgrade that cuts rotational mass significantly—translating to quicker acceleration and more responsive handling, especially in off-road conditions. The...12110015- SKU:
- 12110015
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal 50-Tooth Rear Sprocket for Kawasaki 112U-520-50GEBK
RENTHAL
$99.82Shaving nearly two-thirds of the weight from your rear sprocket directly translates to quicker acceleration and more responsive handling—especially critical when you're pushing hard in competitive or technical terrain. The 7075-T6 aluminum construction...12110017- SKU:
- 12110017
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$99.82 -
Renthal Ultralight Rear Sprocket 51T Black 112U-520-51GEBK
RENTHAL
$99.82Reducing unsprung weight is one of the most effective ways to improve acceleration and handling dynamics on a sportbike or dirt bike. The Renthal Ultralight Rear Sprocket replaces heavy steel with precision-engineered 7075-T6 aluminum, cutting weight by...12110018- SKU:
- 12110018
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- BLACK
- 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:
- 51
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
$99.82 -
Renthal 48T Ultralight Rear Sprocket for Suzuki Black 123U-520-48GYBK
RENTHAL
$99.82Rotational mass directly impacts acceleration and throttle response—every gram counts in competitive riding and aggressive trail work. The Renthal 48T Ultralight Rear Sprocket cuts weight by 66% compared to steel while maintaining the rigidity required...12110020- SKU:
- 12110020
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$99.82 -
Renthal 48-Tooth Black Aluminum Rear Sprocket for Yamaha 150U-520-48GBBK
RENTHAL
$99.82If you're running a 520 chain on your Yamaha and want measurable gains in acceleration without adding rotational mass, this Renthal sprocket is a direct upgrade. The 7075-T6 aluminum construction sheds approximately 66% of the weight you'd carry with a...12110025- SKU:
- 12110025
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- 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
$99.82 -
Renthal 50-Tooth Black Rear Sprocket 150U-520-50GBBK
RENTHAL
$99.82A lightweight rear sprocket is one of the most direct upgrades you can make to improve acceleration and throttle response on your dirt bike or off-road machine. The Renthal 50-Tooth Rear Sprocket combines 7075-T6 aluminum construction with self-cleaning...12110027- SKU:
- 12110027
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal 49-Tooth Rear Sprocket for Honda 154U-520-49GRBK
RENTHAL
$99.82Reducing unsprung weight is one of the most direct ways to improve acceleration, braking response, and handling dynamics on your Honda. The Renthal 49-Tooth Rear Sprocket replaces heavy steel with aerospace-grade 7075-T6 aluminum—cutting weight by 66%...12110031- SKU:
- 12110031
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$99.82 -
Renthal Ultralight Rear Sprocket 51T Black 520 Chain 154U-520-51GRBK
RENTHAL
$99.82Reducing rotational mass is one of the most effective ways to improve acceleration and throttle response on a motorcycle. The Renthal Ultralight Rear Sprocket cuts weight by approximately 66% compared to steel alternatives, while its 7075-T6 aluminum...12110033- SKU:
- 12110033
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
$99.82 -
Renthal 46T Rear Sprocket for KTM 85 SX 17/14 2004-2017 441U-428-46GPSI
RENTHAL
$99.82If you're running a KTM 85 SX hard in the dirt, sprocket choice directly impacts your power delivery and handling. This Renthal 46-tooth sprocket trades unnecessary weight for durability without compromise—reducing unsprung mass improves acceleration and...12110088- SKU:
- 12110088
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal Ultralight Rear Sprocket 48T 428 Chain KTM 85 SX 441U-428-48GPSI
RENTHAL
$99.82If you're running a KTM 85 SX and want measurable gains in acceleration without adding rotational mass, the Renthal Ultralight Rear Sprocket delivers. At 66% lighter than steel, this CNC-machined 7075-T6 aluminum sprocket improves throttle response and...12110090- SKU:
- 12110090
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 428
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
$99.82 -
Renthal Ultralight Rear Sprocket 49T 428 Chain Silver 441U-428-49GPSI
RENTHAL
$99.82If you're running a KTM 85 SX or 105 SX, sprocket wear directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal Ultralight 49T rear sprocket cuts unsprung weight by 66% compared to steel equivalents, sharpening your...12110091- SKU:
- 12110091
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- UNITS:
- EACH
$99.82 -
Renthal Red 49-Tooth Rear Sprocket for Honda 154U-520-49GRRD
RENTHAL
$104.61If you're running a 520 chain setup on your Honda, sprocket weight directly impacts your bike's acceleration and overall responsiveness—and this Renthal aluminum sprocket cuts weight by 66% compared to steel while maintaining the durability needed for...12110160- SKU:
- 12110160
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$104.61 -
Renthal 51-Tooth Red Rear Sprocket for Honda 154U-520-51GRRD
RENTHAL
$104.61A lightweight rear sprocket directly impacts your Honda's acceleration, handling, and drivetrain efficiency. By switching to Renthal's 7075-T6 aluminum design, you'll reduce unsprung weight while gaining durability that outperforms traditional...12110162- SKU:
- 12110162
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$104.61 -
Renthal 48-Tooth Rear Sprocket for Yamaha WR and YZ Models 150U-520-48GBBU
RENTHAL
$104.61If you're running a Yamaha WR or YZ and want measurable gains in acceleration and handling without adding weight, upgrading to a lightweight aluminum sprocket is one of the highest-return modifications you can make. The Renthal 48-tooth rear sprocket...12110164- SKU:
- 12110164
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$104.61 -
Renthal Blue 50-Tooth Rear Sprocket for Yamaha 150U-520-50GBBU
RENTHAL
$104.61Lightweight performance and durability are critical when you're pushing your Yamaha to its limits on the track or trail. The Renthal Blue 50-Tooth Rear Sprocket cuts rotational mass by approximately 66% compared to steel alternatives, translating...12110166- SKU:
- 12110166
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal TwinRing Rear Sprocket 50T Black 1120-520-50GPBK
RENTHAL
$142.50If you're running a 50-tooth rear sprocket on your dirt bike, you need a component that can handle both the demands of aggressive riding and the punishment of off-road terrain. The Renthal TwinRing combines a lightweight aluminum core with a hardened...12100805- SKU:
- 12100805
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$142.50
