Join Date: Jan 2008
Bikes: Road: Fabris (Italian) MTB: Bontrager
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opinion on flat prevention
I don't care for slime: it doesn't work well on side punctures nor on "snake bites" (tube is pinched against rim, usually when running low pressure and there is an impact against wheel) and slime seems to gum up presta valves after awhile and cause a slow leak at the valve.
I've had mixed results with other stuff like liners, kevlar-belted tires, puncture resistant tubes, ...
However, I will go up to a year or longer without significant flats riding on New Mexico broken glass and goat-head thorns by using the "system" approach. For my mountain bike I took old Avocet kevlar belted slicks (where the kevlar belt had snapped and the tire was not useable anymore), cut off the wire bead, and stuffed it into a quality (I like Continental) tire, with lots of baby powder in between the two tires and around the tube. Anything that will penetrate the Conti gets sheared off before it penetrates the Avocet tire.
I do the same system with my road bike. Currently I'm using an old Conti (super sport 23) inside a Conti Gatorskin 23.
Try it. Your bike shop may have some old tires to give you if you don't have any. The extra weight is well worth the peace of mind when I know I don't have to swerve into traffic to miss every encounter with glass.