FEATURES -

• Please select model and appropriate size.
• Steel and aluminium composite rear chainwheel.
• Renthal's Twinring chainwheel is the longest lasting most durable chainwheel you can buy - developed over five years of extensive testing.
• The Renthal Twinring combines a specially enhanced 7075 T6 Aluminium alloy centre and an ultra high strength electroless nickel coated steel outer ring.
• By combining these two materials we have created a chainwheel that is lighter than steel but more durable than the traditional all aluminium chainwheel.
• The unique flat face design keeps weight to a minimum and prevents fouling on the chain guide.