I just got my new 404's and noticed a sticker on them that says 18-23 tires only. I had been planning on using a 25-28 on the rear for some training sessions (PT Hub) but wanted to make sure I'm not committing some frowned upon act.

Is there any reason I shouldn't run a 25-28 on my rear for training purposes? I don't want to disrupt the space-time-continuum or anything.

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