Does it have to be that exact size, or will other sizes work? I can get 23" tubes 30 seconds away from my work, I know tubes will expand somewhat but I don't want to be ruining them. The tires still have a ton of tread but are weather cracking on the sidewall a bit and almost left me stranded a couple weeks ago (either a big crack opened up or I sliced one, it was dark and I was in buttfuck nowhere so I shoved a couple plugs in it and aired it up to get me home. Haven't looked at it since). Don't want to buy new tires as I'll be upgrading to a bigger bike or SxS before long. I figured I'd throw a couple tubes in them for now so I can get out this weekend.