I'm doing ironman Regensburg on Sunday. Training has gone well, flights booked, hotel sorted. Tidy. I'm in my first year of triathlon, decided on a whim to upgrade to a TT 6 Weeks ago having never ridden one before. Anyway, i'm used to it, all is tickety boo except that its got tubs instead of clinchers and i've never even attempted to change a tub before. So, do I practice changing it at home although that obviously means ungluing the current one and then having to get it glued on again, and also risks massively stressing self out over the whole thing. Out shall I just take a spare on race day as a precaution and pray to God that I don't get a flat? Thoughts? Anyone else been in the same boat?