§ 01 / Part
12111143 SPROCK R 520 51T SI UL SC
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
RENTHAL
14-day returns
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§ 02 / About this part
What it is
The RENTHAL SPROCK R 520 51T SI UL SC, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.
This component sits on your rear hub to manage final drive delivery. Machined from 7075 T6 aluminium, it reduces unsprung weight compared to steel alternatives. Replace this part when teeth show hooking or thinning to prevent premature chain wear. This 51-tooth version offers a shorter gearing ratio for tighter technical tracks or improved low-end snap. Always use new bolts and thread lock during installation. Ensure your chain is correctly tensioned to avoid excessive load on the countershaft bearing.
§ 03 / Specs
The numbers
- Brand
- RENTHAL
- Part number
- 12111143
- Weight
- 0.51 kg
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 108 models · 118 year-bands
AJP 1 model
Beta 7 models
Gas Gas 38 models
- EC 125 1997–2010
- EC 125 RACING 2009–2011
- EC 125 RACING 2013–2015
- EC 125 SIXDAYS 2009–2011
- EC 200 1999–2009
- EC 200 2014
- EC 200 2018–2019
- EC 200 E4 2019
- EC 200 RACING 2011
- EC 200 RACING 2013–2015
- EC 200 RANGER 2019
- EC 200 RANGER E4 2019
- EC 200 SIXDAYS 2011
- EC 250 1997–2014
- EC 250 2018–2019
- EC 250 E4 2018–2019
- EC 250 F 2012–2015
- EC 250 RACING 2008–2015
- EC 250 SIXDAYS 2009–2011
- EC 300 1999–2014
- EC 300 2018–2019
- EC 300 E4 2018–2019
- EC 300 F 2013–2015
- EC 300 RACING 2008–2015
- EC 300 RANGER 2019
- EC 300 RANGER E4 2019
- EC 300 SIXDAYS 2009–2012
- EC 450 F 2013–2015
- EC 515 FSR 2009
- ENDURO 250 GP 2018–2019
- ENDURO 300 GP 2018–2019
- FSE 450 I.E. 2003–2007
- HALLEY 450 SM 2009
- SM 450 FSR 2008–2009
- SM 515 FSR 2008–2009
- XC 200 2019
- XC 250 2018–2019
- XC 300 2018–2019
Husqvarna 47 models
- CR 125 1995–2013
- CR 250 1995–2006
- CR 360 1992–1994
- FS 450 2015
- SM 125 S 2004–2012
- SM 450 R 2004–2010
- SM 450 R I.E. 2008–2010
- SM 510 R 2005–2010
- SM 510 R I.E. 2008–2010
- SM 570 R 2002–2004
- SM 610 2008–2009
- SM 610 E 1999
- SM 610 I.E. 2008–2009
- SM 610 S 1999–2007
- SM 630 R 2011
- TC 250 2003–2012
- TC 250 R 2013
- TC 449 2011–2013
- TC 450 2003–2010
- TC 510 2004–2009
- TC 570 2001–2002
- TC 610 1991–2000
- TE 250 2003–2012
- TE 250 R 2013
- TE 310 2009–2012
- TE 350 1992–1995
- TE 400 2001–2002
- TE 410 1995–2000
- TE 449 2011–2013
- TE 450 2003–2010
- TE 510 2004–2010
- TE 511 2011–2012
- TE 610 1991–2001
- TE 610 2006–2007
- TE 610 E 1999–2004
- TE 610 E 2006
- TE 630 I.E. 2010–2012
- TXC 250 2008–2012
- TXC 449 2011
- TXC 450 2008–2010
- TXC 510 2008–2010
- TXC 511 2011–2012
- WR 125 1995–2013
- WR 250 1998–2013
- WR 300 2009–2013
- WR 360 1992–2002
- WRE 125 1995–1999
Sherco 25 models
- 2.5 250 I 2008
- 4.5 450 I 2005–2008
- SC 125 2019
- SCF 250 2019
- SE 125 2021–2022
- SE 2.5 250 IR 2012–2013
- SE 250 2022
- SE 3.0 300 IF 2010–2011
- SE 3.0 300 IR 2012–2013
- SE 300 2022
- SE 4.5 450 IF 2009–2011
- SE 4.5 450 IR 2012–2013
- SE 5.1 510 IF 2009–2011
- SE 5.1 510 IR 2012–2013
- SE-R 125 2018–2021
- SE-R 250 2016–2019
- SE-R 250 2021
- SE-R 300 2021
- SEF 250 2022
- SEF 300 2022
- SEF-R 250 2017–2021
- SEF-R 450 2015–2019
- SEF-R 450 2021
- SEF-R 500 2021
- ST 300 2022
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
