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    Mountain bike (MTB) bottom brackets

    Mountain bike bottom brackets take a lot of hammer. We expect them to work in sorts of filth, withstand all sorts of heavy landings, take the crashes and happily spin away for hundreds of miles without complaint. Bottom brackets don't last forever so every year or so you'll probably be on the lookout for a replacement. Most mountain bikes use hollow axle chainsets running on external bearing bottom brackets. There are some new bikes that use the Press Fit oversized system. For those who still have ol' faithful we also still keep stock on squar taper bottom brackets. We stock BBs from Shimano, Sram, Hope, Race Face and more.