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In Stock Using Alternative Sprocket

Supersprox Rear Stealth Alloy MX RAL-210-51-BLK 3421051SAK

In stock using alternative sprocket - See description for details
Supersprox rear Stealth sprocket. £34.14 RRP Inc VAT.
Temp out of stock | Usually dispatched within 24 hours
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This sprocket is out of stock, but alternative sprockets are available (3421051SAR / 3421051STR / ).

Supersprox-stealth means longer life, without compromising weight. They last 3 times longer than an all aluminum sprocket and remain as light as possible. It’s about performance and function first and last.

Supersprox-stealth is infinitely better than steel! You just can’t achieve this level of strength on a steel sprocket with the same weight. Sure, there are light steel sprockets out there, but they can’t handle the torque. Pound (lb) for foot pound (ft/lbs), Supersprox-stealth is the best.

Try to ride 20,000 miles on a Hayabusa with an aluminium sprocket or the whole Dakar rally on one sprocket. What about the Baja 1000? These are extremes and factory teams actually buy Supersprox-stealth for these gruelling challenges. Don’t waste your money on aluminium, invest in Supersprox-stealth.

This might sound like an unusual question, but there’s a lot of misinformation out there. When you think about bearings for an example. They`re steel on steel and that works great. Steel on steel is the best combination. So when a dealer tells you steel teeth can damage your chain, ask yourself if they only sell aluminium sprockets. We guarantee our sprockets. If they don’t do what we claim, you can have your money back.

There is no doubt, riveting is the only possibility for fixing such a high performance sprocket. We know how to use this technology, forging rivets into the sprockets. We have never had one single rivet break since starting to produce these sprockets. That’s over 6 million rivets in the past 20 years.

Its perfect for any bike up to 1400 cc. Do you have a powerful 4 stroke or performance street bike? Covering high mileage or road racing, then this is your best option. A single sprocket can last more than 20,000 miles (See maintenance instructions).


  • Honda CR125 R 1983 1984
  • Honda CR125 R 1985 1985
  • Honda CR125 R 1986 1986
  • Honda CR125 R 1987 1996
  • Honda CR125 R 1998 1999
  • Honda CR125 R 2002 2002
  • Honda CR250 R 1988 1991
  • Honda CR500 R 1988 1991
  • Honda CRF250 R 2004 2009
  • Honda CRF450 X 2005 2019
  • Honda CRF450 X 2005 2016
  • Teeth:
  • Material:
  • Centre:
  • Colour:
  • Position:


  • Honda: CR 125 R, CR 250 RJ, CR 250 RK, CR 250 RL, CR 250 RM, CR 500 RJ, CR 500 RK, CR 500 RL, CR 500 RM, CRF 250 R4, CRF 250 R5, CRF 250 R6, CRF 250 R7, CRF 250 R8, CRF 250 R9, CRF 450 XC
For full fitment details in a searchable list please check the FITMENTS tab.

Product FAQs
Can I request a special sprocket / size that isn't available?

Yes Supersprox provide a special sprocket request service, make your request using the special sprocket request service form here


Standard Delivery

Orders will be despatched as follows: To business addresses only; £7.50 (Exc VAT) delivery charge (subject to change depending on account level); Free delivery with net order values of £100 and over (Exc VAT) to the UK Mainland; Orders to N. Ireland/Eire/Isle of Man/Scilly Isles by arrangement; other destinations phone for details; Typical delivery times of 1-2 working days.

Where possible, the Company will endeavour to meet special delivery requirements subject to any additional cost being borne by the Purchaser

Unfortunately, we do not delivery to addresses outside of mainland UK without prior agreement. Without prior agreement you may place an order for Products from outside the UK, but this order must be for delivery to an address in mainland UK unless arranged otherwise prior to your order.

Pallet Charges

Larger items may incur additional carriage charges, including but not limited to 4x4 and SUV tyres.


Read our full delivery policy here

Honda CRF 250 R4 2004
Honda CRF 250 R7 2007
Honda CRF 450 XC - Cross Country 2018
Honda CR 125 R 1998
Honda CR 125 R 1999
Honda CR 125 R 2000
Honda CR 125 R 2001
Honda CR 125 R 2002
Honda CR 125 R 2003
Honda CR 125 R 2004
Honda CR 125 R 2005
Honda CR 125 R 2006
Honda CR 125 R 2007
Honda CRF 250 R5 2005
Honda CRF 250 R6 2006
Honda CRF 250 R8 2008
Honda CRF 250 R9 2009
Honda CR 125 R 1996
Honda CR 125 R 1987
Honda CR 125 R 1989
Honda CR 125 R 1988
Honda CR 250 RK 1989
Honda CR 125 R 1985
Honda CR 125 R 1986
Honda CR 250 RJ 1988
Honda CR 125 R 1990
Honda CR 125 R 1991
Honda CR 125 R 1992
Honda CR 125 R 1993
Honda CR 125 R 1994
Honda CR 125 R 1983
Honda CR 125 R 1984
Honda CR 125 R 1995
Honda CR 250 RL 1990
Honda CR 250 RM 1991
Honda CRF 450 XC - Cross Country C 2018
Honda CRF 450 XC - Cross Country 2019
Honda CR 500 RL 1990
Honda CR 500 RM 1991
Honda CR 500 RJ 1988
Honda CR 500 RK 1989
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