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I'm wanting to calculate the gear ratios for a bike my dad gave me as a gift but I can't find it listed anywhere, nevermind being able to find a manual. Based on the stickers it's a Performance Cross X100 and, from what my dad has told me, it was made sometime prior to 1999. However, after multiple searches I have only found that the first X model Performance made was the X103 for the year 1993 and no X100 model is listed.
And no, I don't want to count gear teeth by hand
Given the age of the bike, you can't really assume that its the original cassette, so if you really want to be certain, you will have to count the teeth on the cassette. Looking at the picture, the Cross obviously doesn't refer to Cyclocross, and the huge inner ring on the cassette doesn't look stock for that time.
I ride thousands of miles a year, and don't know the gear ratios of any of my bikes. Is there a reason that it's important to you?
