The Madera Helm Spline-Drive Sprocket at J&R Bicycles is a classic helm sprocket built to be super tough with high-quality materials and engineering. Constructed from durable 7075 aluminum with a hardened chromoly steel insert, this sprocket is built to last without adding much weight. The insert matches up with the 48-spline spindle which is included. No sprocket bolt needed, and it is made in the USA!
FEATURES
- American Made
- 7075 Aluminum
- No sprocket bolt needed or usable. Spline adapter only.
- Hardened CrMo steel insert matches up to the 48 spline spindle (included)
- Available for 19mm and 22mm spindles
- Available 25t and 28t
- Weight: 81g/285 oz (25t)
IMAGE NOTE: The image shown is the 25T sprocket. You will be getting the product that you order when purchase.


















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