Discussion
I'm guessing you mean BMX adpater or the MTB adapter, deciding on what cranks you have going on, BMX or MTB.
There is a standard for 3 piece, 4 bolt and 5 bolt rings so if you get the right spider, then any ring will fit as long as the amount of holes is correct.
There is a standard for 3 piece, 4 bolt and 5 bolt rings so if you get the right spider, then any ring will fit as long as the amount of holes is correct.
You will see spiders marked as CD (compact drive) or ATB (standard drive). A BCD of 110mm means you want an ATB spider. Look at the sizes on HERE for example
edit - actually, not sure what the implications (if any) are of running those funky (3 piece) cranks or with one ring setup

edit - actually, not sure what the implications (if any) are of running those funky (3 piece) cranks or with one ring setup
Edited by thepickle on Wednesday 15th November 20:26
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