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gbj_tester
Never worked with an eccentric bottom bracket before so would appreciate some help as to what I’m looking at here. My Dawes tandem recently developed some play (about 2-3mm movement give or take) at the BB area, and I suspect I need to tighten it up. We have ridden it for a while because we were organising a wedding and I couldn’t be arsed to fettle and hope we haven’t done too much damage.
Gave it a quick try today with my usual crank 8mm Allen key but it doesn’t bodge in either direction. Before I put more force into the key I thought to check - it seems to have another thing on top of it that takes what I’m guessing is a 10mm allen key - is that some sort of lockring I have to undo before I can tighten the crank? Is there a brand for this BB and if I’ve knackered it, how difficult/expensive is it to replace?