PaRtZ Posted April 23, 2007 Report Share Posted April 23, 2007 Is there any way you can measure a frame specifics and use a formula to work out the bb size? I dont need to find out a bb size for a frame but i was just wondering for future reference is there any way cos i dont think I know of any Add to the wealth of knowledge Quote Link to comment Share on other sites More sharing options...
Anodised Adamant Posted April 23, 2007 Report Share Posted April 23, 2007 Yes there is m8 and here is how you do it! measure the axle length by getting a vernier caliper and measure end to end, so basically theres your axle length and then on your old bb it should say your shell size on it aswell eg. 68! now you have these two measurments you can now choose what Bottom Bracket you need! Quote Link to comment Share on other sites More sharing options...
dave85 Posted April 23, 2007 Report Share Posted April 23, 2007 In the situation of not having the old bb to hand, the shell size is easy to come by, the bb axle length is mainly guesswork and experience. You can measure for it, but its not the easiest thing to do without some tools. Quote Link to comment Share on other sites More sharing options...
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