HomeShimano Altus M310 7/8 Speed Rear Derailleur Black MTB Specifications: Speed: 7/8 Speed Weight: ~308g Bike Type: Mountain Bike SKU: RD-M310Shimano Altus RD M310 7/8 Speed Rear Derailleur Black MTB 21/24 speedSKU: RD-M310$32.99PriceQuantityAdd to Cart