25% Off Select Ibis Bikes | Specialized Drop Bar Closeouts
Save 20% on Salsa, Surly, and All-City with codes SALSA20, SURLY20, ALLCITY20 in checkout.
The Shimano Altus RD-M310 rear derailleur is a quality, durable replacement rear derailleur for 7 and 8-speed drivetrains.
- 13t upper and 15t lower pulleys
- Maximum cog size: 34t
- Total capacity: 43t