BurlyBox Posted March 31, 2011 Report Share Posted March 31, 2011 ive just got my first trials bike and i got it pretty cheap but it needed some repairs and one of them is the bottom bracket because the axle is literally flaking away and has wrecked the left crank as well. the problem is i have no idea how to measure it and what part of it needs to be measured. Can anyone offer any advice? also its for an Onza T-Pro 2005 in case someone already knows. Thanks, Jake Quote Link to comment Share on other sites More sharing options...
Jamie_Trials Posted March 31, 2011 Report Share Posted March 31, 2011 128mm It will say inside the BB, pretty sure you measure them from each axle end. Quote Link to comment Share on other sites More sharing options...
BurlyBox Posted March 31, 2011 Author Report Share Posted March 31, 2011 ahh thanks. i think what im gonna do is taing down to th LBS and get them to order in a BB and replace it and at the same time put on some new cranks when i find some. Quote Link to comment Share on other sites More sharing options...
BurlyBox Posted April 1, 2011 Author Report Share Posted April 1, 2011 can i fit 127.5 or not then? because thats the size ive found more often Quote Link to comment Share on other sites More sharing options...
Nick Manning Posted April 1, 2011 Report Share Posted April 1, 2011 can i fit 127.5 or not then? because thats the size ive found more often Yes you can. 127.5 is 0.25mm shorter on each side than a 128mm you wont notice the difference. Are you replacing the complete crankset or just the one that is ruined? If you are replacing the cranks and bottom bracket, I would highly recommend getting an ISIS bottom bracket and ISIS cranks. Quote Link to comment Share on other sites More sharing options...
BurlyBox Posted April 2, 2011 Author Report Share Posted April 2, 2011 (edited) Yes you can. 127.5 is 0.25mm shorter on each side than a 128mm you wont notice the difference. Are you replacing the complete crankset or just the one that is ruined? If you are replacing the cranks and bottom bracket, I would highly recommend getting an ISIS bottom bracket and ISIS cranks. pretty much yeah im getting a complete new crankset as the left crank wobbled and destroyed the bottom bracket and the crank so i thought id replace the lot. i might go for the ISIS parts though but i know they are a little more expensive. are ISIS parts much better than square? and also what about 127mm? would that work? (sorry about all of the questions) Edited April 2, 2011 by BurlyBox Quote Link to comment Share on other sites More sharing options...
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