JJDT Posted October 13, 2014 Share I'm still in the learning phase regarding parts etc. Question what is the difference between a Sram and a Shimano chainring? From a noob point of view it looks the same but I'm sure there is more to it. Thanks Link to comment Share on other sites More sharing options...
JXV Posted October 13, 2014 Share Some have different BCD (bolt circle diameter) depending the type of crank they are made for. Google "chainring BCD" to get a whole lot of compatibility charts and related stuff Link to comment Share on other sites More sharing options...
Dazshell Posted October 13, 2014 Share Should be fully interchangeable Compact (50/34) has 110mm BCD, Standard (53/39) has a 130mm BCD. BCD is the max distance between the nuts - 5 on a road bike. Link to comment Share on other sites More sharing options...
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