• Put on 14T dura-ace sprocket and an 1/8" chain today, and at quarter past 4, went down the road at 40mph.
    So thats 99.5 GI, I should be going faster right?

    a) how fast did you go at say 4:30.?
    b) exactly how fast do you think you should be going then..? 60 ? 70? 80.?

About