You could let a bit of air out the tube, but it doesn't really matter. When you build a wheel, the tension drops a bit when you first stick a tyre on and inflate it - compressing the rim I suppose.
@BringMeMyFix started
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You could let a bit of air out the tube, but it doesn't really matter. When you build a wheel, the tension drops a bit when you first stick a tyre on and inflate it - compressing the rim I suppose.