I make 60s about 90g per wheel heavier than 38s. Not mega massive, but significant. Could you even put 23s on 27mm rims?
60s will reach the magic 3:1 shape though where you suddenly start winning everything.
Is the rim 27mm at the brake track? Probably not. If not, yes you can fit 23s.
@miro_o started
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I make 60s about 90g per wheel heavier than 38s. Not mega massive, but significant. Could you even put 23s on 27mm rims?