Top tube length is what matters. Everything else can be fixed by choosing the right seat post and stem angle, but if the top tube is the wrong length you end up with a funny stem length which messes up the steering.
@gbj_tester started
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Top tube length is what matters. Everything else can be fixed by choosing the right seat post and stem angle, but if the top tube is the wrong length you end up with a funny stem length which messes up the steering.