HollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load. The chainring teeth have been developed to work in conjunction with the CN7900 and CN6700 chains for increased contact to provide greater efficiency and improved power transfer….
– Shimano Ultegra 6750 Hollowtech II Compact Chainset Chainsets – £119.99 (RRP – £)
