Shimano Ultegra FC-6800 Chainring Size:39t With the addition of the

With the addition of the DEFTRAP pedal

Vent Mount:

Certified to meet Oeko-Tex Standard 100

Zinc-Alloy plated outer links

Shimano Ultegra FC-6800 Chainring Size:39t With the addition of theShimano Ultegra FC 6800 Chainring 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 11 speed HG EV chains for increased contact to provide greater efficiency and improved power transfer. Features: Material: Aluminium Teeth: 50,52,53,46,34,36,39 Bolt Pattern: 4