RoadBikeReview.com's Forum Archives - General


Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )


thorn through tread, replace tire?(5 posts)

thorn through tread, replace tire?jds_md
Sep 12, 2001 2:01 PM
I had a flat yesterday where a thorn went clean through the tread of the tire, right in the middle. I pulled out the thorn and put in a new tube and got home fine, but I wonder if I should replace the tire now. The hole is about the size of a pen tip. What do you think?

Thanks,

jds
probably notjtolleson
Sep 12, 2001 2:13 PM
it is probably fine. The only time a whole in the tread can be an issue is when it is big enough for pieces of the inflated tube to pooch through and get pinched. If that was going to happen, it probably would have happened already, assuming you reinflated fully. Thorn pricks do not, in my experience, necessitate new tires.
Very Trickygrzy
Sep 12, 2001 2:13 PM
Normally a hole from a thorn is fairly small and will not affect the overall life and performance of the tire. However, it all depends upon the size of the thorn. Crank it up to max pressure spec., then take a careful look at the tire and the area around it. Look for bulging or deformation that would indicate an over stressed condition. Let it sit over night - consider placing it on the rear with the idea being that you have a better chance of not crashing if the blowout is on the back. Park Tools makes a super sticky mylar type of tire casing patch that can be applied to the inside. In a pinch people will use Pwer Bar wrappers and even a dollar bill to relieve some of the stress, but the patch is better. If you're truly worried then get a new tire and use the suspect one on the trainer over the winter. Running at a lower pressure may not necessarily buy you anything - while the stress from the pressure is less the casing goes through more deformation and can increase the chances of another failure mechanism.

Ultimately decide how much it's worth it to you to NOT crash. Is $50 worth not having to grow new skin?
probably notjtolleson
Sep 12, 2001 2:13 PM
it is probably fine. The only time a whole in the tread can be an issue is when it is big enough for pieces of the inflated tube to pooch through and get pinched. If that was going to happen, it probably would have happened already, assuming you reinflated fully. Thorn pricks do not, in my experience, necessitate new tires.
re: thorn through tread, replace tire?Lone Gunman
Sep 12, 2001 6:47 PM
Patch the inside of the tire, should be fine.