The Enduro bottom bracket adapters for BB30 to 24mm cranks allow you to use a Shimano 24mm Hollowtech II crank on a BB30 or PressFit 30 frameset with BB30/PF30 bearings installed. Just place these adapters in-between the bearings and crank. Left side and right side are clearly marked.
These 6061 precision machined aluminum adapters are fitted with O-rings inside and out to ensure creak-free performance. Aluminum adapters do not flex or distort under load as much as some popular Delrin adapters.