REAR SPROCKET TWINRING KTM, RENTHAL 2240-520-50GPSI (JTR897), 2240-520-50GPSI
REAR SPROCKET TWINRING KTM RENTHAL 2240-520-50GPSI (JTR897), 2240-520-50GPSI. The longest lasting most durable off-road sprocket developed over 5 years. Features a unique flat face design to keep weight to a minimum and ensure the TwinRing is as narrow as a regular chainwheel. Inner ring is high strength Ultralight 7075 T6 Aluminium. Outer ring is Electroless Nickel Coated steel. Outer is expanded at 200 C and then fitted to inner, creating a permanent bond. Weight 800g.
- SKU
- SR990-50.REN.TR
- Brand
- Renthal
- Availability
- In Stock (8)
FULL DESCRIPTION
Renthal Twin Ring Rear Sprocket
The Renthal Twin Ring Rear Sprocket is engineered for maximum durability and longevity in demanding off-road conditions. Developed over five years, this sprocket offers superior lifespan compared to conventional sprockets. Its unique flat face design minimizes weight while maintaining a narrow profile, comparable to standard chainwheels.
Key Features:
- Construction: Combines a high-strength Ultralight 7075 T6 Aluminium inner ring with an Electroless Nickel Coated steel outer ring.
- Bonding Process: The steel outer ring is heated to 200°C and expanded before being fitted to the aluminium inner ring. This creates a permanent, lifelong bond between the two components.
- Durability: Designed to be the most durable off-road sprocket available.
- Weight: The unique flat face design contributes to a lightweight construction.
- Profile: Maintains a narrow profile, similar to regular chainwheels.


