Surly Stainless Steel Outer MWOD Chainrings are designed to convert your Mr. Whirly Offset Double Crankset in an offset mountain double crank. This will allow you to run and extra wide rear tire and rim combo (4.7" tires on 100mm rims for example) while eliminating chain on tire rub. The outer ring bolts directly to the inner ring with 4 chainring bolts
Designed for the MWOD Cranks
Inner BCD (for mounting to granny ring) is proprietary; outer BCD (for bashguard) is 104mm
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