Hoping to do this as my first longer fixed ride - assuming 71 GI is about right?
i did it on 74.5 GI last year as i couldn't change my rear sprocket.
this year 66.6 - the mark of the beast
you'll be perfect on 71.
@skive started
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i did it on 74.5 GI last year as i couldn't change my rear sprocket.
this year 66.6 - the mark of the beast
you'll be perfect on 71.