Aherne746 Posted June 30, 2017 Report Share Posted June 30, 2017 So today I remembered I had locked up my onza trials bike about 3 years ago at work, and not touched it since. I bought it for £50. It needs pedals and new grips and it will ride (ordered) Its a onza spyrogyra so nothing mind blowing. How do I go about finding out what chain and sprockets I need. I was thinking about buying a separate set so that I could have a similar gearing to bmx for some street cruising. Any info about these bikes in general will be good. New to trials but not new to bikes. Thank you Quote Link to comment Share on other sites More sharing options...
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