zoster Posted May 14, 2011 Report Share Posted May 14, 2011 (edited) Hi ! since echo started making these spanish isis bottom brackets, which are supposed to be lighter and stronger, i was wondering if frames could suffer a conversion from euro to spanish bb shells. the bearings have an outer diameter of 37mm, and the bb shell of my marino is about 39.4, so this would leave 1.2 mm of steel to keep them in place. not sure if it's enough, what do you think? on an alu frame, there should be a bigger percentage of material left so it should be safer. also, i don't know if the shells of the echo frames are 68mm wide, as are the euro ones, maybe someone can clear this out. mind you, i'm not thinking about this very seriously, i'm quite fine with my current setup, but i found it somewhat interesting. ps: this would be done at a metal shop, where they have the right equipment to make the shell the right size in order to press fit the bearings, i'm not thinking to make this on my own with a drill or something Edited May 14, 2011 by zoster Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 14, 2011 Report Share Posted May 14, 2011 They're still 68mm wide Quote Link to comment Share on other sites More sharing options...
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