Shimano Ultegra FC6800 11 Spd Double ChainringShimano Ultegra FC6800 11 Spd Double Chainring Genuine Shimano replacement part. For use with Shimano Ultegra FC 6800 11spd Double cranksets Can also use the 39T Inner Chainring from the Shimano Dura Ace FC 9000, this is a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc. Speicfications: Material: Aluminum Teeth: 34t, 36t, 39t, 46t, 50t, 52t, 53t Bolt Pattern: 4 Bolt Chainring BCD: 110mm Chain

This is especially helpful when increasing power out of a slower corner

A variant of the external bottom bracket

471XX FEATURES:

and nearly impenetrable seals grant the DUB bottom brackets markedly improved durability

quieter and require less maintenance

Chrome-plated finish

296 - 450g

Add as a spare or replacement battery to extend your adventures beyond your imagination

Even those riders that use our Standard Lite and Original chain lubes

Mount Type: PM to PM 6""

Less loss of pedaling power by rigid structure with easy and effortless shifting operation

Uses the 100-5C adjustable linkage clamp