Geology

Big Kahuna

Administrator
MCR and SIR were the same bike only the SIR bottom bracket was set up for the eccentric bottom bracket for adjusting chain tension. you can convert the SIR to geared.
 

CD155MX

Squirrel!!!
Anybody looking for a Medium Sir 9 currently setup w/ 2X9? Should really sell it rather than letting it collect dust in the garage. Was wifes old bike, but now she is rocking full squish.
 
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