Join Date: Sep 2005
Bikes: Windsor Fens, Giant Seek 0 (2014, Alfine 8 + discs)
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I use schrader valves. I used to use presta, and I don't see any advantage, and several disadvantages. For one thing, I don't have a presta inflator on my air compressor in the garage, and I have to carry an adapter around to use gas station air, etc. I don't have any trouble at all pumping up any pressure I like, even with my portable pump, with schrader, and it doesn't leak down any worse either.
I wouldn't use a can of fix-a-flat unless it was a DIRE emergency, either on a car or on a bike. You use fix-a-flat on a car tire, it's just to get you home, then you have to buy a new tire, and the place will probably charge you extra because of having to deal with the crap all over the tire and rim. At least with the bike I guess it would be MOSTLY limited to the inside of the tube.
If you were going to do this, you might as well just roll with one of the SLIME type compounds in the tube. Be sure to go with one that actually works though, I understand there are some. My bike came with SLIME tubes and all it did was make a mess, it never stopped a single leak no matter how small, every leak went down dead flat every time. SLIME just made it hard to clean up, though it did make it easy to find the leak.
Work: the 8 hours that separates bike rides.