Originally Posted by
rekmeyata
Again, Slime does nothing to help road tires, unless your willing to limp home with about 60 psi in the tire after a flat. Like I said before, the high pressure of road tires prevents the Slime from sealing even the smallest pin hole once pressure exceeds 65 to 70psi.
Also Slime tubes use the worst presta valves I've had the misery of using, they lasted about 6 or so attempts to pump before the valve would fail...and I don't mean clogging, although they would do that, but I mean the valve would actually break. I've never had this problem with any other presta valve.
Slime works relatively well for me in road tires at 95 psi. I'm in goathead territory (NM) and after trying thick tubes, liners, kevlar tires, etc., I settled on cheap presta tubes, cheap tires, and slime. Of course, the slime still fails with anything bigger than a pin-prick and that happens once or twice a year. Now I simply replace tubes every two months, or as needed if sooner, rather than gluing on 4 or 5 patches
per week.
I'm good at patching tubes, but after a while it gets ridiculous, and the downsides of sealant become a non-issue. YMMV.