Shimano 105 Octalink Bottom Bracket
It's a Blu-Ray world these days and for those of you still rocking the crank equivalent of VHS, this Octalink bottom bracket is on the case to help keep your otherwise perfectly good bike on the road.
Octalink bottom brackets are compatible across the board so even though this is a 105 bottom bracket, it works just fine with Ultegra and Dura Ace plus any other brand of crankset utilizing the Octalink design.
This particular bottom bracket is English threaded and measures 68 x 109.5mm, which is the spindle length to fit double cranksets. This bottom bracket is not compatible with triple set ups.