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small puncture (about 1/8”) on tire tread .. applying patch question

1537 Views 32 Replies 7 Participants Last post by  cxwrench, 
Z
have 2 small punctures thru a road tire where each puncture is less than 1/8” in length. i put a new tube on and reused the tire there is no bulging or waviness in the area of the slits but one of them is just offset from the center tread closer towards the side wall. the 2 small punctures are about 1/2 inch from eachother, one is close to center of tread, the other is offset towards the wall.

it looks like the casing of the tire in the area is still intact.

the tire is a bontrager hard-case, 700C 32mm.

i am wondering if there is a permanent patch or something similar that could be used or would be good to add to the inside of the tire ? one reason is to keep any foreign debris/objects from getting in to where they can rub on the tube.

at first i thought the park tb-2 tire boot might be what i was looking for but not sure.

maybe folks just throw away the tire/replace but i dont want to do that considering it has just a few hundred miles and plenty of life in it i have already gone for a ride @about 90 psi with it and havent noticed any anomalies yet

any recommendations ?
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Z
tlg said:
Superglue? Forget it. It dries hard and brittle. It'll never hold on flexing rubber.
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agreed. there are some other glues out there labeled as superglues but containing rubber. wonder if that's what ppl refer to when reading about them dabbing a tire with superglue.

i have shoe goo laying around, so i will dab that small piece, just to keep that layer of rubber over the exposed weaving in the tire. if it comes off at some point not a big deal, i wouldn't replace my tire yet.

the other day it occurred to me that a decent road bike tire can cost more than half of what a decent car tire does ...
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tlg
zero7404 said:
agreed. there are some other glues out there labeled as superglues but containing rubber. wonder if that's what ppl refer to when reading about them dabbing a tire with superglue.

i have shoe goo laying around, so i will dab that small piece, just to keep that layer of rubber over the exposed weaving in the tire. if it comes off at some point not a big deal, i wouldn't replace my tire yet.

the other day it occurred to me that a decent road bike tire can cost more than half of what a decent car tire does ...
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No, people are referring to super glue. It's a common thing people try. Waste of time.

Shoe goo for what you described might be useful. That stuff is pretty durable and stays flexible.
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Z
shoe goo is holding up well so far ... and the tpu tubes i am using have inspired some confidence in the past 100 miles of riding on same road conditions as before with butyl tubes.

so now, i'm slowly lowering tire pressure to see if that adds a little comfort, but still like a firm feel so i doubt i'll go below 75 psi. using tyrewiz sensors has given me some additional data for actual pressure during a ride and depending on outside temps. riding and idle in sunlight, the pressure rises by 2 - 3 psi. no rim brakes to introduce additional heat but these tpu tubes are rated to handle rim brakes as well
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K
zero7404 said:
shoe goo is holding up well so far ... and the tpu tubes i am using have inspired some confidence in the past 100 miles of riding on same road conditions as before with butyl tubes.

so now, i'm slowly lowering tire pressure to see if that adds a little comfort, but still like a firm feel so i doubt i'll go below 75 psi. using tyrewiz sensors has given me some additional data for actual pressure during a ride and depending on outside temps. riding and idle in sunlight, the pressure rises by 2 - 3 psi. no rim brakes to introduce additional heat but these tpu tubes are rated to handle rim brakes as well
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For your reference, given known gas laws, the pressure will rise 10% for every 49 F (27 C) rise in temperature. And it's linear, so you can calculate it directly.
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Z
i'm aware of the ideal gas law ...

plus/minus 2% change in pressure for every plus/minus 10 deg F change in temperature. i set and measure at room temperatures of 70 - 75F. depending on the day, i would set pressure according to what i want during a ride.

but there is additional rise in temperature as the tire heats up from direct sunlight. so a calculation based on outside temps would be approx. but not very accurate if the bike is left in the sun while heading into a shop or stopping for a break somewhere.

sensors show me that, but the sensors are also in direct sunlight so there is some additional noise there that skews the reading
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cxwrench
I'm starting to think you might just be able to over-think all of the fun out of riding a bike.
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Z
i don't use my brain at all when i ride a bike ...
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Lombard
zero7404 said:
i don't use my brain at all when i ride a bike ...
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Really? How is that possible? You use your brain every time you move a muscle.
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velodog
cxwrench said:
I'm starting to think you might just be able to over-think all of the fun out of riding a bike.
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Z
observations and overthinking are 2 different things …

what i’m discussing here are observations i hadn’t given much thought to in the past and find it interesting.

knowing pressure in real time helps to dial it in …
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zero7404 said:
i'm aware of the ideal gas law ...

plus/minus 2% change in pressure for every plus/minus 10 deg F change in temperature. i set and measure at room temperatures of 70 - 75F. depending on the day, i would set pressure according to what i want during a ride.

but there is additional rise in temperature as the tire heats up from direct sunlight. so a calculation based on outside temps would be approx. but not very accurate if the bike is left in the sun while heading into a shop or stopping for a break somewhere.

sensors show me that, but the sensors are also in direct sunlight so there is some additional noise there that skews the reading
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There are lots of searchable resources on the effect of sunlight on pavement temperature. Pavement on a sunny day is where you get most of the heat input to a tire. Per others' comments, you are WAY overthinking this, but that's just you isn't it.
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Z
seems like wherever i post in this forum, the same folks keep coming back to have a last word …

fine by me, but you’re starting to look like a troll
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cxwrench
No, we've all be around for years. Thousands and thousands of posts. You've been here 5 weeks, barely over 100 posts. Go look in the mirror.
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