Join Date: Nov 2003
Location: Toronto, Ontario
Bikes: True North tourer (www.truenorthcycles.com), 2004; Miyata 1000, 1985
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I did lightweight road touring on 23 mm tires for years without major problems. I came to expect one flat on every ten or twelve day tour. On my final trip with this particular bike, I installed a 25 mm tire on the back, and had zero flats.
On my new bike, I have 28 mm Kevlar-lined tires. On its first tour I fixed one puncture. There is no absolute immunity from flats!
Narrow tires are faster, but for touring, I don't really notice a speed difference between the 23 and the 28 mm tires. I do feel a bit more secure on the 28 mm tires, especially on rough roads.
Why not try the 25 mm tires and see what happens? They may be fine. But if you find yourself fixing a lot of flats, you will know better next time!
I carry an extra inner-tube to make it faster to fix flats. Substitute the old tube for the new, and then fix the puncture when stopped for the day.