SG-X chainrings are a major technological advancement that enables super smooth front shifting under extreme heavy loads. Special teeth profiles, pick-up spikes and ramps make front derailleur shifts comparable to rear shifting smoothness. SG-X chainrings deliver smoother, quieter and quicker shifts….
– Shimano 110 PCD FC-4550 Tiagra 34T Inner Chainring Chainrings – £16.75 (RRP – £)
