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  • Having read this thread, I went into the garage and did some measuring;

    I have 2 steel frames from the 90's, pre compact chainsets. The distance from from bottom of the front mech lug to the bottom bracket shell is 115 and 114mm respectively. Both of these frames have been used with 48 tooth outer chainrings without problems. I've also got 2 newer frames with compact chainsets (50 tooth outer) and the lug to BB shell is 105 and 107mm

    Useful?

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