I spent a couple of weeks up in Lincolnshire last month and after 4/5 days, even though I hadn't used the bike much, thought I should check my tyre pressures. I pulled up at a garage, shoved my 50p into the machine, and then spent 2 mins swearing at my wheels because I couldn't get the nozzle onto the valve because of the lack of clearance with my discs, and the pump times out.

Now this doesn't normally happen, I usually find it a snug fit... but then again, I always use go to the same garage! I was so annoyed that I got on the bike and went a couple of miles down the road to the next garage. Guess what?... The same thing happened!

So... went down to another garage in the center of town... machine out of order!!

Surprisingly, 4th time lucky!!

Even though it was a tight fit.
It's made me wonder, what if I suddenly realised that I needed air? Maybe a slow puncture? What if I was in an urgent rush? What should be a 5-10 min nip to the garage took just over an hour in the end.
I'm not sure how much clearance the new TT has around the wheels, but I've just picked up one of these to leave in the front pocket in case I get caught out, and thought I'd share and suggest that many of you may want to do the same!!
http://www.mandp.co.uk/productinfo/506332/Tyres/Valves-and-Caps/Economy