Are boost cranks 53...
 

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[Closed] Are boost cranks 53mm ?

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I’m looking at getting a new crank, Sram eagle gx, there are a few good deals kicking around, the bike has a 73mm bb shell and I believe I need a boost crank is that the 53mm gx crankset or 49mm ? Or can you have a non boost 53mm crankset and if so what’s the blinking difference? It’s making my brain hurt.


 
Posted : 23/11/2017 1:16 pm
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For Sram cranks, the crankset is all the same, but the spider 9or direct mount ring) provides the offset to make it boost/non boost.

49mm would be non boost, 53mm boost - confusingly, SRAM also do 156mm and 168mm cranks, that refers to Q-factor (width between the pedals) of the cranks


 
Posted : 23/11/2017 1:26 pm
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Many thanks for the clarity. Think the term ‘standardisation needed’ spring to mind.


 
Posted : 23/11/2017 1:56 pm
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But those are the standards aren't they? 😉


 
Posted : 23/11/2017 2:11 pm

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