If you want to run extra wide rims on your puglsey, youre going to need to run an offset double. The Surly MWOD chainrings convert your current Mr. Whirly crankset by getting rid of the largest ring and shifting the middle and granny rings outward.
104mm outer BCD
Proprietary inner BCD depending on the granny ring
3/32", Shimano/SRAM 10, Shimano/SRAM 9
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