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§ 01 / Part
12101137 SPROCKET R 520 50T BL SC TWIN
Fits 186 bikes
RRP
£120.84
Save 20%
£96.67
incl. VAT
In stock — delivered in 6–10 working days
Dispatched in 2–3 working days · delivered in 6–10.
Part #: 12101137
Authorised stockist
RENTHAL
14-day returns
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Secure checkout
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§ 02 / About this part
What it is
The RENTHAL SPROCKET R 520 50T BL SC TWIN, sprockets. Stocked by Iron Offroad, the UK MX hard parts specialist.
This hybrid sprocket features a steel outer ring for maximum wear resistance and an aluminium inner for weight reduction. It sits on the rear hub and is built to handle the grit and grime of UK off-road riding. The 50-tooth sizing offers a standard gear ratio suitable for a wide range of track conditions. You should replace the sprocket when the teeth become pointed or thin to avoid damaging your chain. Use thread lock on the mounting bolts and verify the alignment of your rear wheel after installation is complete.
§ 03 / Specs
The numbers
- Brand
- RENTHAL
- Part number
- 12101137
- Category
- Sprockets
- Weight
- 0.81 kg
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 186 models · 212 year-bands
CCM 1 model
Gas Gas 21 models
- EC 125 2025
- EC 250 2022–2025
- EC 250 F 2022–2025
- EC 300 2021–2026
- EC 450 F 2024–2025
- EC 500 F 2024–2026
- ES 350 2024
- ES 500 2024
- EW 500 F 2024
- EX 250 2022–2025
- EX 250 F 2021–2025
- EX 300 2021–2025
- EX 350 F 2021–2025
- MC 125 2021–2027
- MC 150 2025
- MC 250 2022–2025
- MC 250 F 2021–2027
- MC 300 2025
- MC 350 F 2022–2025
- MC 450 F 2021–2027
- RX 450 F 2023–2024
Husaberg 18 models
- FC 550 2005–2006
- FE 250 2013–2015
- FE 350 2013–2015
- FE 390 2010–2012
- FE 450 2009–2013
- FE 450 E 2006–2008
- FE 501 2013–2015
- FE 550 E 2006–2008
- FE 570 2009–2012
- FE 650 E 2006–2008
- FS 450 E 2006–2008
- FS 570 2010–2012
- FS 650 C 2006–2008
- FS 650 E 2003–2008
- FX 450 2010–2012
- TE 125 2012–2015
- TE 250 2011–2015
- TE 300 2011–2015
Husqvarna 35 models
- 701 ENDURO 2016–2021
- 701 ENDURO LR 2020
- 701 SUPERMOTO 2016–2021
- FC 250 2014–2027
- FC 350 2014–2025
- FC 450 2014–2027
- FE 250 2014–2026
- FE 350 2014–2026
- FE 350 S 2015–2016
- FE 350 S 2020–2022
- FE 350 S 2025–2026
- FE 450 2014–2026
- FE 501 2014–2025
- FE 501 S 2015–2017
- FE 501 S 2020–2022
- FE 501 S 2025–2026
- FS 450 2018–2022
- FX 350 2017–2025
- FX 450 2017–2024
- TC 125 2014–2025
- TC 150 2025
- TC 250 2014–2023
- TC 250 2025
- TC 300 2025
- TE 125 2014–2016
- TE 125 2025–2027
- TE 150 2017–2019
- TE 150 I 2020–2023
- TE 250 2014–2018
- TE 250 I 2018–2027
- TE 300 2014–2018
- TE 300 I 2018–2027
- TX 125 2017–2019
- TX 300 2017–2019
- TX 300 I 2020–2025
KTM 136 models
- ADVENTURE 640 1999–2006
- ADVENTURE 790 2019–2020
- ADVENTURE 790 R 2019–2020
- ADVENTURE 890 ABS 2021
- ADVENTURE 890 R ABS 2021
- DUKE 620 E 1996–1998
- DUKE 640 E 1999–2007
- DUKE 690 2008–2011
- DUKE 690 ABS 2012–2019
- DUKE 690 R 2010–2011
- DUKE 690 R ABS 2013–2017
- DUKE 790 ABS 2018–2020
- DUKE 890 ABS 2021
- DUKE 890 R ABS 2021
- EGS 400 LC4 1997–1998
- EGS 400 LC4 E 1997–2000
- EGS 620 LC4 1997–1998
- EGS 620 LC4 E 1997–1998
- ENDURO 690 R 2009–2013
- ENDURO 690 R ABS 2014–2016
- ENDURO 690 R ABS 2019–2020
- EXC 125 1993–2016
- EXC 150 TBI 2024–2025
- EXC 150 TPI 2020–2023
- EXC 200 1998–2011
- EXC 200 2014–2016
- EXC 250 1993–2017
- EXC 250 RACING 2002–2006
- EXC 250 TBI 2024–2025
- EXC 250 TPI 2018–2023
- EXC 300 1995–2007
- EXC 300 2011–2017
- EXC 300 TBI 2024–2027
- EXC 300 TPI 2018–2023
- EXC 380 2000–2001
- EXC 400 2000–2003
- EXC 400 RACING 1999–2007
- EXC 450 2007
- EXC 450 2009–2012
- EXC 450 RACING 2003–2007
- EXC 500 2012–2015
- EXC 520 2000–2002
- EXC 520 RACING 1999–2002
- EXC 525 RACING 2003–2007
- EXC 530 2008–2011
- EXC 620 LC4 1997–1998
- EXC-F 250 2007–2026
- EXC-F 350 2012–2027
- EXC-F 450 2017–2027
- EXC-F 500 2017–2027
- FR 450 2021–2022
- LC4 640 E 1999–2006
- RALLY 450 2021–2022
- RALLY 660 2003–2004
- RXC-E 620 LC4 1997
- SC 620 LC4 1997–1998
- SM 690 2007–2008
- SMC 660 2003–2006
- SMC 690 2008–2011
- SMC 690 R 2012–2013
- SMC 690 R ABS 2014–2017
- SMC 690 R ABS 2019–2024
- SMR 450 2006
- SMR 450 2022–2026
- SX 125 2003–2027
- SX 144 2008
- SX 150 2009–2022
- SX 150 2025
- SX 200 2003–2004
- SX 250 1993–2027
- SX 300 2023–2026
- SX 360 1996–1997
- SX 380 1998–2002
- SX 400 2000–2003
- SX 400 RACING 2000–2002
- SX 520 2000–2003
- SX 520 RACING 2000–2002
- SX 525 2003–2006
- SX 525 RACING 2003–2006
- SX 620 LC4 1997–1998
- SX-F 250 2006–2027
- SX-F 350 2011–2027
- SX-F 450 2007–2027
- SX-F 450 RACING 2007–2010
- SX-F 505 2008
- SX-F 505 RACING 2007–2008
- SXC 400 LC4 1997–1999
- SXC 620 LC4 1997
- SXC 625 2003–2006
- TXC 400 LC4 1998
- XC 125 2021–2025
- XC 150 2010–2015
- XC 200 2006–2010
- XC 250 2006–2013
- XC 250 2015–2019
- XC 250 TPI 2020–2025
- XC 300 2004–2018
- XC 300 TPI 2020–2022
- XC 300 TPI 2024–2027
- XC 450 2004–2007
- XC 450 ATV 2008
- XC-F 250 2007–2011
- XC-F 250 2014–2016
- XC-F 250 I 2018–2025
- XC-F 350 2011
- XC-F 350 2013–2015
- XC-F 350 I 2016–2024
- XC-F 450 2008–2009
- XC-F 450 2013–2014
- XC-F 450 I 2016–2025
- XC-F 505 2008–2009
- XC-W 125 2017–2019
- XC-W 125 TPI 2026
- XC-W 150 2017–2020
- XC-W 150 TPI 2021–2023
- XC-W 150 TPI 2026
- XC-W 200 2006–2016
- XC-W 250 2009–2013
- XC-W 250 2015–2019
- XC-W 250 TPI 2019–2022
- XC-W 300 2006–2016
- XC-W 300 2018–2019
- XC-W 300 TPI 2019–2023
- XC-W 300 TPI 2026
- XC-W 400 2007
- XC-W 400 2009–2010
- XC-W 450 2007–2016
- XC-W 500 2012–2013
- XC-W 500 2016
- XC-W 530 2009–2011
- XCF-W 250 2009–2013
- XCF-W 250 2015–2016
- XCF-W 350 2012–2016
- XCF-W 350 2020–2022
- XCF-W 450 2024–2026
- XCF-W 500 2020–2022
Stark 1 model
No matches. Try a different make or model.
* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.
§ 05 / About Iron Offroad
Iron Offroad
Iron Offroad is the off-road sibling of Iron City and Iron Stable — a UK shop for motocross, enduro, and trail-bike hard parts. Every fitment lives on the site, listed against KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is the data: fully enriched fitment so you find the right part for your bike quickly and get it fitted accurately. Brands you'd find on a paddock workbench — pads, sprockets, plastics, fork seals, cables, gaskets, bars, the things that actually wear out. Road-bike kit, scooter parts, and quad gear sit elsewhere; dirt and e-moto only. We operate from our storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. The business has a rich motorcycle history across multiple moto brands — the photos show where we came from — and recently pivoted into hard parts and online retail.
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