Are you 18 years old or older?
Sorry, the content of this store can't be seen by a younger audience. Come back when you're older.
OneUp's oval design has 3 main benefits; traction, traction and more traction. Forget any of the power gain claims that you've heard from the road side of the sport. For mountain, oval rings provide a more constant torque to the rear wheel thereby reducing spinouts and stalls on tough climbs.
*Shims - Included with rings. For 2x crank conversions; shims between the crank and ring get you back to an ideal 49-50 mm chainline. For 3x crank conversions; shims under the bolt heads allow reuse of your 3x hardware.
94/96 BCD Traction Chainrings Specification
All symmetrical 4 arm 94 mm BCD cranks (SRAM XO1, X1, GX), all symmetrical 4 arm 96 mm BCD cranks (Shimano compact triple M782, M672, M622, M612) * note 30T is only compatible with 94 mm SRAM BCD cranks.
SRAM chainrings usually have the BCD laser etched on the back of the ring
If your Shimano 3x crank has a 30T middle ring this is the 1x ring you need. Shimano crank part numbers are usually laser etched on the pedal end of the crank on the back face.
Installation: Align the small bump (small hole on direct mount rings) on the inner edge of the ring with your crank arm
Orders Over £50 - Free (Royal Mail)
Orders Under £50 - £4.95 (RoyalMail)
Our standard delivery time is 3–5 days. We do our very best to deliver orders within this time, but occasionally there are delays outwith our control, caused by either suppliers or couriers.
We offer free UK delivery on all bikes unless bought through a Ride To Work Scheme.
We don't currently deliver complete bikes outside the UK.
Custom-built bikes can be delivered in kit form (for you to assemble) - we can include shipping to your country in your quote.
Due to the number of delivery options, the best way to get a shipping price is to add what you would like to your basket and begin the checkout. You'll be able to see the shipping price before you checkout.
Unless IOSS applies (see below) our website will remove UK VAT. You are likely to be liable for tax and duties in your delivery country.
Tax and duties will be calculated at the checkout. Once you have paid 20Twenty you will have nothing to pay in your delivery country.
Free (excluding bikes) Delivery applies to:
UK Orders Over £50
EU Orders Over £400
Great rates on Worldwide shipping with FedEx & Royal Mail
No idea what any of this is about? Or left it too late? We're not here to judge. Send them a 20Twenty Gift Card!
Our email gift vouchers can be used online or in store.
We pride ourselves on providing great service, impartial advice and the best knowledge gained from actually using the products we stock!
We appreciate that price is important too. Click the button for full details of our price promise.