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 49T Silver 2240-520-49GPSI
RENTHAL
$142.50If you're running a 520 chain setup and demand sprocket longevity without sacrificing weight, the Renthal Twinring 49T delivers the durability of steel with the agility of aluminum. The dual-ring construction outlasts conventional all-aluminum sprockets...12100252- SKU:
- 12100252
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$142.50 -
Renthal TwinRing Rear Sprocket 51T Silver 520 Chain 2240-520-51GPSI
RENTHAL
$142.50Sprocket wear is one of the fastest paths to drivetrain failure, especially under racing conditions or aggressive riding. The Renthal TwinRing 51T combines a lightweight 7075 T-6 aluminum core with a durable nickel-coated steel outer ring to give you...12100254- SKU:
- 12100254
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
$142.50 -
Renthal Twinring 50-Tooth Rear Sprocket Black 1230-520-50GPBK
RENTHAL
$142.50If you're running a 520 chain setup and demand sprocket durability without sacrificing weight, the Renthal Twinring 50-tooth rear sprocket delivers the engineering to back it up. The hybrid construction—7075 T-6 aluminum inner ring bonded with an...12100808- SKU:
- 12100808
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
$142.50 -
Renthal TwinRing Rear Sprocket 50T Black 1500-520-50GPBK
RENTHAL
$152.48If you're running a demanding off-road program, your rear sprocket takes a beating—mud, impacts, and constant chain stress test durability limits fast. The Renthal TwinRing 50T combines a lightweight aluminum core with a hardened steel outer ring,...12100810- SKU:
- 12100810
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$152.48 -
Renthal TwinRing Rear Sprocket 48T Black 520 Pitch 1540-520-48GPBK
RENTHAL
$152.48If you're running a 520 chain and demand sprocket durability that won't compromise your bike's weight, the Renthal TwinRing rear sprocket delivers the performance advantage you need. The dual-ring construction—pairing a lightweight 7075 T-6 aluminum...12100811- SKU:
- 12100811
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$152.48 -
Renthal TwinRing Rear Sprocket 49T Black 520 Chain 1540-520-49GPBK
RENTHAL
$142.50If you're running a 520 chain setup and need a rear sprocket that can handle the punishment of off-road riding without adding unnecessary weight, the Renthal TwinRing delivers durability where it counts. The dual-material construction—ultralight 7075 T-6...12100812- SKU:
- 12100812
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- TYPE:
- DRIVE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$142.50Qty in Cart: 0Quantity:Price:$142.50Subtotal: -
Renthal Twinring Rear Sprocket 50T Black 1540-520-50GPBK
RENTHAL
$142.50If you're running a 520 chain on your off-road machine, sprocket wear directly impacts throttle response, chain longevity, and overall drivetrain reliability. The Renthal Twinring 50T delivers the durability of steel with the weight savings of aluminum—a...12100813- SKU:
- 12100813
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$142.50Qty in Cart: 0Quantity:Price:$142.50Subtotal: -
Renthal TwinRing Rear Sprocket 51T Black 1540-520-51GPBK
RENTHAL
$142.50If you're running a 520 chain setup, sprocket wear directly impacts your acceleration response and chain longevity. The Renthal TwinRing 51T delivers the durability of a steel sprocket with the weight savings of aluminum—a combination that standard...12100814- SKU:
- 12100814
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
$142.50Qty in Cart: 0Quantity:Price:$142.50Subtotal: -
Renthal Twinring Rear Sprocket 52T Black 2240-520-52GPBK
RENTHAL
$142.50If you're running hard on the track or tackling technical terrain, sprocket durability directly impacts your power delivery and lap times. The Renthal Twinring rear sprocket combines lightweight aluminum with hardened steel in a permanent bond that...12100817- SKU:
- 12100817
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 52
- TYPE:
- DRIVE
$142.50 -
Renthal TwinRing Rear Sprocket 50T Blue 1500-520-50GPBU
RENTHAL
$149.98If you're running a 520 chain setup and need a sprocket that won't sacrifice strength for weight, the Renthal TwinRing 50T delivers the durability of steel with the lightweight advantage of aerospace-grade aluminum. The hybrid construction—combined with...12100819- SKU:
- 12100819
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$149.98 -
Renthal Twinring Rear Sprocket 48T Red 520 Chain 1540-520-48GPRD
RENTHAL
$149.98Rear sprocket selection directly impacts your bike's acceleration, top-end speed, and drivetrain wear patterns—choosing the right tooth count and construction quality is non-negotiable for consistent performance. The Renthal Twinring rear sprocket...12100820- SKU:
- 12100820
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$149.98 -
Renthal TwinRing Rear Sprocket 51T Red 520 Chain 1540-520-51GPRD
RENTHAL
$149.98The Renthal TwinRing rear sprocket delivers the durability and lightweight performance needed for demanding off-road conditions. Its dual-ring construction—combining Ultralight™ 7075 T-6 aluminum with electro-less nickel-coated steel—withstands chain...12100823- SKU:
- 12100823
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$149.98Qty in Cart: 0Quantity:Price:$149.98Subtotal: -
Renthal Twinring Rear Sprocket 50T Orange 2240-520-50GPOR
RENTHAL
$149.98If you're running a 520 chain setup and serious about off-road performance, sprocket wear directly impacts your power delivery and acceleration response. The Renthal Twinring combines a lightweight aluminum core with a hardened steel outer ring, giving...12100984- SKU:
- 12100984
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$149.98Qty in Cart: 0Quantity:Price:$149.98Subtotal: -
Renthal Twinring Rear Sprocket 52T Orange 2240-520-52GPOR
RENTHAL
$149.98If you're running a 520 chain setup and want a sprocket that won't fail mid-race, the Renthal Twinring 52T delivers the durability you need without the weight penalty. By combining a lightweight 7075 T-6 aluminum core with an electro-less nickel-coated...12100985- SKU:
- 12100985
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 52
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
$149.98 -
Renthal 46-Tooth Ultralight Rear Sprocket for Husqvarna TC85 17/14 and 19/16 Blue 441U-428-46GPBU
RENTHAL
$104.61Reducing unsprung weight directly improves your Husqvarna's acceleration, handling, and suspension response—critical advantages in competitive racing and technical terrain. The Renthal 46-tooth ultralight rear sprocket delivers this performance gain...12111722- SKU:
- 12111722
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- TOOTH COUNT:
- 46
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
$104.61 -
Renthal 47-Tooth Blue Rear Sprocket for Husqvarna TC85 441U-428-47GPBU
RENTHAL
$104.61If you're running a Husqvarna TC85 in motocross or supercross, drivetrain weight directly impacts your bike's acceleration and handling. The Renthal 47-Tooth Rear Sprocket cuts unsprung weight by 66% compared to steel while maintaining the durability...12111723- SKU:
- 12111723
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- BLUE
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
$104.61 -
Renthal 45-Tooth Rear Sprocket for Kawasaki KX125 KX250 KX450 KDX200 KDX220R KDX250 KLX250 KLX300 KLX450R 112U-520-45GESI
RENTHAL
$99.82Rear sprocket wear directly impacts acceleration, chain longevity, and overall drivetrain efficiency—making a quality replacement essential for serious riders. The Renthal 45-tooth aluminum sprocket delivers the lightweight performance and self-cleaning...R112B45- SKU:
- R112B45
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 45
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$99.82 -
Renthal 47-Tooth Rear Sprocket for Kawasaki KX250F 2004-2016 112U-520-47GESI
RENTHAL
$99.82If you're running a KX250F, rear sprocket selection directly impacts your power delivery and handling characteristics. The Renthal 47-tooth sprocket cuts unsprung weight by 66% compared to steel alternatives, translating to quicker acceleration and more...R112B47- SKU:
- R112B47
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 47
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$99.82Qty in Cart: 0Quantity:Price:$99.82Subtotal: -
Renthal 48-Tooth Rear Sprocket for Kawasaki KX and KLX Models 112U-520-48GESI
RENTHAL
$99.82Shaving nearly two-thirds of the weight from your rear sprocket directly translates to sharper acceleration and more responsive handling on the track or trail. The Renthal 48-tooth rear sprocket combines ultralight 7075-T6 aluminum construction with...R112B48- SKU:
- R112B48
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CHAIN SIZE:
- 520
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 48
- COLOR/FINISH:
- SILVER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$99.82 -
Renthal 49-Tooth Rear Sprocket for Kawasaki 520 Chain Models 112U-520-49GESI
RENTHAL
$99.82Shave 66% of unsprung weight off your rear wheel while gaining measurable acceleration improvements—that's what CNC-machined 7075-T6 aluminum delivers. The Renthal 49-tooth rear sprocket is engineered for Kawasaki 520 chain systems to handle serious...R112B49- SKU:
- R112B49
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- UNITS:
- EACH
- CHAIN SIZE:
- 520
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- COLOR/FINISH:
- SILVER
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$99.82
