Shimano Altus M310 Groupset M310 Rear Derailleur RD-M310 Front Derailleurs FD-M310 Shifter Lever SL-M310 3*8 Speed Shimano Altus M310 Groupset. SL-M310:Right-side Acera SL-M310 Rapid Fire Shifter with cables and housing.Compatible with most mountain/hybrid bikes with flat handle bars.Rapid-fire dedicated up and down-shift levers; indexed speed indicator. SHIMANO Altus Front Derailleur Top Pull FD-M310. Diameter:34.9mm.Weight:204g. Compatible with HYPERDRIVE. Built for CHAIN LINE of 50mm. SHIMANO Altus Rear Derailleur RD-M310.Weight308g. Front shifter:3 speed.Rear shifter:8 speed.