Item #LS-4964RC: Shimano model ES25 Octalink cartridge bottom bracket; designed to fit bicycle frames with English bottom bracket threading, which is 1.370" x 24TPI. The Octalink bottom bracket has a splined axle, which is designed to fit only crank arms that have the corresponding Octalink spline. This Octalink Version 2 bottom bracket fits the following Shimano mountain bike cranksets: Deore XT (ES70/71), Deore LX (ES70/71), Deore (ES50/51) and the following model numbers: FC-M752, FC-M751, FC-M572, FC-M571, FC-M510-8 and FC-M440-8.
