piperfraz Posted July 1, 2011 Report Share Posted July 1, 2011 I was looking at some Trialtech ISIS cranks earlier, and was wondering if they would fit my BB. I don't know what kind it is, but i'm pretty sure it's the one my Onza T-Pro came with originally. Any help much appreciated Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 1, 2011 Report Share Posted July 1, 2011 I was looking at some Trialtech ISIS cranks earlier, and was wondering if they would fit my BB. I don't know what kind it is, but i'm pretty sure it's the one my Onza T-Pro came with originally. Any help much appreciated Well, if your BB is ISIS then that's fine. If not, then no. I'd imagine the BB is square taper. Quote Link to comment Share on other sites More sharing options...
piperfraz Posted July 1, 2011 Author Report Share Posted July 1, 2011 Okay, i'm gonna take the cranks off to have a look, but what are the differences between ISIS and square taper to look for?Another question, the cranks come with a sprocket used on a 24"...Are the sprocket sizes different from mod and stock? Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 1, 2011 Report Share Posted July 1, 2011 Okay, i'm gonna take the cranks off to have a look, but what are the differences between ISIS and square taper to look for? Another question, the cranks come with a sprocket used on a 24"...Are the sprocket sizes different from mod and stock? A square taper BB has 4 edges. An ISIS has several splined edges. Have a look at some pictures on tartybikes if you don't understand. Does your T-Pro not have a freewheel on the front? Quote Link to comment Share on other sites More sharing options...
piperfraz Posted July 1, 2011 Author Report Share Posted July 1, 2011 Yeah it does, but the person selling the cranks has a sprocket and bash ring on it, would I be better with just the cranks? Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 1, 2011 Report Share Posted July 1, 2011 Yeah it does, but the person selling the cranks has a sprocket and bash ring on it, would I be better with just the cranks? Yes, if you ran a sprocket on the front you would need to run a freewheel or freehub on the rear. You'd probably be best sticking with your current ratio. Quote Link to comment Share on other sites More sharing options...
Kieran Morrison Posted July 2, 2011 Report Share Posted July 2, 2011 (edited) I was looking at some Trialtech ISIS cranks earlier, and was wondering if they would fit my BB. I don't know what kind it is, but i'm pretty sure it's the one my Onza T-Pro came with originally. Any help much appreciated Take your crank off, is the bb axle square? it more than likely will be if its the original, so isis cranks wont fit And stick with a freewheel on the front, if not you'll find yourself spending alot of money and its annoying to change all of it about Edited July 2, 2011 by Kieran Morrison Quote Link to comment Share on other sites More sharing options...
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