Altus M310 7/8 Speed Rear Derailleur Cage:Small Riders under 170cm typically suit

Riders under 170cm typically suit shorter crank arms

a matched road groupset derailleur is more appropriate

Sizing here means derailleur compatibility

Clean the axle contact surfaces before fitting and inspect the bearing end-face for corrosion

It is best used as a precision replacement for worn or damaged pulleys in a Dura-Ace R9100 rear derailleur

Altus M310 7/8 Speed Rear Derailleur Cage:Small Riders under 170cm typically suitThe Shimano Altus M310 is a 7 8 speed rear derailleur built for hybrid and commuter bikes across India. Whether you're threading through Pune traffic, grinding up the Ooty ghat roads, or logging weekend kilometres around Hyderabad, this component delivers consistent, predictable gear changes without demanding constant attention or expensive upkeep. Use Cases Daily training. Reliable use across Indian training conditions heat, humidity, and rough