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 TwinRing Rear Sprocket 50T Blue 520 Chain 2240-520-50GPBU
RENTHAL
$149.98Rear sprocket durability directly impacts acceleration response and chain life—cheap alternatives wear out in half the time and cost you races. The Renthal TwinRing solves this with a hybrid construction that combines the weight savings of aluminum with...12101137- SKU:
- 12101137
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
$149.98 -
Renthal Twinring Rear Sprocket 49-Tooth Green 520 Chain 112052049GPGN
RENTHAL
$149.98If you're running a 520 chain setup, your sprocket choice directly impacts acceleration response, chain longevity, and overall drivetrain reliability. The Renthal Twinring 49-tooth rear sprocket eliminates the traditional trade-off between weight and...12101139- SKU:
- 12101139
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- GREEN
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$149.98 -
Renthal Twinring Rear Sprocket 51T Green 112052051GPGN
RENTHAL
$149.98If you're running a 520 chain on dirt or adventure terrain, sprocket wear directly impacts your power delivery and chain life. The Renthal Twinring 51T combines a lightweight aluminum core with a steel outer ring, delivering the durability of all-steel...12101141- SKU:
- 12101141
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
$149.98 -
Renthal Ultralight Rear Sprocket 50T Silver 131U-520-50GBSI
RENTHAL
$99.82Shaving unsprung weight off your Yamaha directly improves handling responsiveness and acceleration—the Renthal Ultralight 50T rear sprocket delivers a measurable advantage in both stock and modified builds. At 66% lighter than steel without sacrificing...R13150- SKU:
- R13150
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$99.82 -
Renthal 49-Tooth Rear Sprocket for Yamaha 520 Chain 150U-520-49GBSI
RENTHAL
$99.82A rear sprocket is one of the highest-wear drivetrain components on any bike—constant chain engagement and mud exposure demand a part that can handle punishment without adding rotational mass. The Renthal 49-tooth rear sprocket delivers that balance with...R150A52049- SKU:
- R150A52049
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
- UNITS:
- EACH
$99.82 -
Renthal 51-Tooth Rear Sprocket for Yamaha 150U-520-51GBSI
RENTHAL
$99.82A lighter rear sprocket directly improves acceleration, handling, and unsprung weight—critical factors whether you're racing on track or tackling technical terrain. The Renthal 51-tooth sprocket combines 7075-T6 aluminum construction with CNC-machined...R150A52051- SKU:
- R150A52051
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- TYPE:
- DRIVE
$99.82 -
Renthal 46-Tooth Rear Sprocket for Honda CR125R CR250R CR500R CRF150F CRF230F CRF250F CRF250R CRF250RX CRF250X CRF450R CRF450RL CRF450RWE CRF450RX CRF450X XR250R XR400R XR650R 154U-520-46GRSI
RENTHAL
$99.82Whether you're pushing hard on the track or grinding through technical terrain, a worn or unsuitable rear sprocket will compromise acceleration, top-end performance, and chain longevity. The Renthal 46-Tooth Rear Sprocket delivers the precision...R15446- SKU:
- R15446
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 46
- UNITS:
- EACH
$99.82 -
Renthal Ultralight Rear Sprocket 47T 520 Chain Silver 154U-520-47GRSI
RENTHAL
$99.82If you're running a Honda and serious about lap times or trail performance, rear sprocket selection directly impacts your power delivery and handling characteristics. The Renthal Ultralight 47T reduces unsprung weight by roughly two-thirds compared to...R15447- SKU:
- R15447
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$99.82 -
Renthal 51-Tooth Rear Sprocket for Honda 154U-520-51GRSI
RENTHAL
$99.82A quality rear sprocket is foundational to consistent power delivery and acceleration—and this Renthal unit delivers without compromise. The 7075-T6 aluminum construction sheds unnecessary weight while maintaining the rigidity needed for hard riding,...R15451- SKU:
- R15451
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 520
- TYPE:
- DRIVE
$99.82 -
Renthal 53-Tooth Rear Sprocket for Honda CR125R CR250R CR500R CRF150F CRF230F CRF250F CRF250R CRF250RX CRF250X CRF450R CRF450RL CRF450RWE CRF450RX CRF450X XR250R XR400R XR650R 154U-520-53GRSI
RENTHAL
$99.82If you're running a Honda dirt bike or off-road machine, your rear sprocket directly impacts acceleration, top-end speed, and overall driveability. The Renthal 53-Tooth Rear Sprocket delivers a measurable weight savings and self-cleaning design that...R15453- SKU:
- R15453
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 53
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
$99.82Qty in Cart: 0Quantity:Price:$99.82Subtotal: -
Renthal 49-Tooth Ultralight Rear Sprocket for Kawasaki KX100 KX85 KX80 191U-420-49GESI
RENTHAL
$99.82If you're running a KX100, KX85, or KX80, this Renthal ultralight rear sprocket delivers measurable gains in acceleration and handling by cutting weight without sacrificing durability. The 7075-T6 aluminum construction withstands aggressive riding and...R19149- SKU:
- R19149
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$99.82 -
Renthal 51-Tooth Rear Sprocket for Kawasaki KX100 KX85 KX80 191U-420-51GESI
RENTHAL
$99.82If you're running a KX85, KX80, or KX100, sprocket choice directly impacts acceleration, top-end speed, and overall drivetrain efficiency. The Renthal 51-tooth rear sprocket delivers a precision-engineered upgrade that reduces unsprung weight while...R19151- SKU:
- R19151
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
$99.82 -
Renthal 48-Tooth Ultralight Rear Sprocket for KTM 65 SX 192U-420-48GPSI
RENTHAL
$99.82Unsprung weight directly impacts your KTM's acceleration and handling, especially on the track or trail. The Renthal 48-Tooth Ultralight Rear Sprocket cuts rotational mass by 66% compared to steel while maintaining the durability you need for consistent...R192U42048- SKU:
- R192U42048
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- SILVER
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- UNITS:
- EACH
$99.82 -
Renthal 49-Tooth Rear Sprocket for KTM 65 SX 192U-420-49GPSI
RENTHAL
$99.82If you're running your KTM 65 SX hard on the track or trail, sprocket weight and traction directly impact your lap times and handling precision. The Renthal 49-tooth rear sprocket cuts weight by 66% compared to steel alternatives while its self-cleaning...R192U42049- SKU:
- R192U42049
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 420
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 49
- COLOR/FINISH:
- SILVER
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal 48-Tooth Ultralight Rear Sprocket for KTM 224U-520-48GPSI
RENTHAL
$99.82Reducing unsprung weight is one of the most direct ways to improve acceleration and handling on a dirt bike, and the Renthal 48-Tooth Ultralight Rear Sprocket delivers exactly that. By switching to this 7075-T6 aluminum design—66% lighter than...R22448- SKU:
- R22448
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$99.82 -
Renthal 50-Tooth Rear Sprocket for KTM 224U-520-50GPSI
RENTHAL
$99.82If you're running a KTM in mud or sand, sprocket weight directly impacts your bike's acceleration and handling—and this Renthal 50-tooth cuts 66% of the mass compared to steel. The self-cleaning tooth grooves keep mud from binding the chain, maintaining...R22450- SKU:
- R22450
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$99.82 -
Renthal Ultralight Rear Sprocket 49T 520 Chain Silver 131U-520-49GBSI
RENTHAL
$99.82The Renthal Ultralight Rear Sprocket puts noticeable acceleration gains directly under your control without sacrificing durability. At 66% lighter than steel, this 7075-T6 aluminum sprocket reduces unsprung mass and rotational inertia—changes you'll feel...R13149- SKU:
- R13149
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
$99.82 -
Renthal Ultralight Rear Sprocket 51T 520 Chain Silver 131U-520-51GBSI
RENTHAL
$99.82If you're running a 520 chain setup and want measurable gains in acceleration and handling, this Renthal sprocket delivers through weight reduction and engineering precision. The 7075-T6 aluminum construction cuts rotating mass by 66% compared to steel—a...R13151- SKU:
- R13151
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$99.82 -
Renthal 47-Tooth Rear Sprocket for Yamaha 150U-520-47GBSI
RENTHAL
$99.82If you're running a 520 chain setup on your Yamaha, sprocket weight directly impacts your bike's acceleration and handling characteristics. The Renthal 47-tooth rear sprocket cuts rotational mass by 66% compared to steel alternatives, translating to...R150A52047- SKU:
- R150A52047
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 47
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
$99.82Qty in Cart: 0Quantity:Price:$99.82Subtotal: -
Renthal 45-Tooth Rear Sprocket for Honda 520 Chain Silver 154U-520-45GRSI
RENTHAL
$99.82If you're running a 520 chain on your Honda, your rear sprocket directly impacts acceleration, top-end speed, and drivetrain longevity. The Renthal 45-Tooth Rear Sprocket replaces steel with precision-engineered 7075-T6 aluminum—cutting rotational mass...R15445- SKU:
- R15445
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
- UNITS:
- EACH
$99.82
