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Search: Posts Made By: terrymorse
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Forum: Road Cycling
02-10-23, 10:51 AM
Replies: 123
Views: 3,461
Posted By terrymorse

Yes, narrow tires can take more pressure than...

Yes, narrow tires can take more pressure than wide tires before failure.

The failure mode is blow off of the tire from the rim, whether hooked or hookless. Pressure rating for a tire accounts for...
Forum: Road Cycling
02-08-23, 11:36 AM
Replies: 123
Views: 3,461
Posted By terrymorse

I hated those old hookless rims. I worked in my...

I hated those old hookless rims. I worked in my parents' shop in the 60s and 70s, and it was so easy to blow off a tire with the air compressor. My ears would ring for the rest of the day.

I don't...
Forum: Road Cycling
02-07-23, 09:00 PM
Replies: 123
Views: 3,461
Posted By terrymorse

Blow offs from heavy braking is not false.

Blow offs from heavy braking is not false.
Forum: Road Cycling
02-06-23, 11:36 AM
Replies: 123
Views: 3,461
Posted By terrymorse

I came here for a good argument...

I came here for a good argument (https://montycasinos.com/montypython/scripts/argument.php.html).
Forum: Road Cycling
02-06-23, 01:55 AM
Replies: 123
Views: 3,461
Posted By terrymorse

Itís not the carbon that fails at high...

Itís not the carbon that fails at high temperature. Itís the resin.

This was a fairly common problem in the early days of carbon rims. Manufacturers have since then switched to resins with a...
Forum: Road Cycling
02-05-23, 02:32 PM
Replies: 123
Views: 3,461
Posted By terrymorse

The braking heat-induced failure mode with...

The braking heat-induced failure mode with tubulars is rolling the tire off the rim. This can occur after the high temperature softens the glue holding the tire to the rim.

Then again, pros...
Forum: Road Cycling
02-05-23, 02:24 PM
Replies: 123
Views: 3,461
Posted By terrymorse

Wearing away rubber from the surface of a brake...

Wearing away rubber from the surface of a brake pad seems to be a very inefficient way to dissipate heat. Unless you're scrubbing away a bunch of material, but then the pad would not last long at...
Forum: Road Cycling
02-02-23, 09:42 AM
Replies: 123
Views: 3,461
Posted By terrymorse

People have reported steam from spoke holes after...

People have reported steam from spoke holes after a descent.
Forum: Road Cycling
01-29-23, 05:34 PM
Replies: 123
Views: 3,461
Posted By terrymorse

It might be clear, if if were not for all the...

It might be clear, if if were not for all the real world evidence to the contrary.

As experienced by countless cyclists over multiple decades, the dominant temperature-induced failure mode of a...
Forum: Road Cycling
01-29-23, 03:58 PM
Replies: 123
Views: 3,461
Posted By terrymorse

Then again, if you are braking so much that a...

Then again, if you are braking so much that a blow off is likely, you are probably going rather slowly, and any crash will be a slow one.
Forum: Road Cycling
01-29-23, 01:52 PM
Replies: 123
Views: 3,461
Posted By terrymorse

As will any tire. The design upper limit for...

As will any tire. The design upper limit for tires is typically 90C. At 120C, tire rubber is soft enough to deform plastically.
Forum: Road Cycling
01-29-23, 12:19 PM
Replies: 123
Views: 3,461
Posted By terrymorse

Yes, certainly the earlier carbon rims that...

Yes, certainly the earlier carbon rims that didn't use high temperature resin could deform permanently under heavy braking.

In the 2010s, we used to rent out Reynolds Attack carbon wheels, until...
Forum: Road Cycling
01-28-23, 12:57 PM
Replies: 123
Views: 3,461
Posted By terrymorse

People can hypothesize day and night about...

People can hypothesize day and night about melting (actually softening) tubes, how they might fail, and what they may sound like when they fail, but here's something that is unequivocal:

The...
Forum: Road Cycling
01-28-23, 11:48 AM
Replies: 123
Views: 3,461
Posted By terrymorse

Semantics. Two phrases that describe the same...

Semantics. Two phrases that describe the same phenomenon, with the second one being more accurate.

If you hear a "boom", the tire came off the rim.
Forum: Road Cycling
01-28-23, 11:27 AM
Replies: 123
Views: 3,461
Posted By terrymorse

Granted, tubes can soften at very high...

Granted, tubes can soften at very high temperatures, leading to failures. Certain thermoplastic TPU tubes have low melting points, leading manufactures to "cover their backsides" warnings like "never...
Forum: Road Cycling
01-28-23, 10:19 AM
Replies: 123
Views: 3,461
Posted By terrymorse

I doubt that. Do you have any references to...

I doubt that. Do you have any references to support this claim that tubeless tire beads are stronger?

I’ve inspected the beads on tubed and tubeless versions of the same model tire. I saw nothing...
Forum: Road Cycling
01-27-23, 04:27 PM
Replies: 123
Views: 3,461
Posted By terrymorse

Tubes don't blow up or melt. The tire fails to...

Tubes don't blow up or melt. The tire fails to hold the pressure, the tube escapes, boom!
Forum: Road Cycling
01-27-23, 11:57 AM
Replies: 123
Views: 3,461
Posted By terrymorse

No, switching to tubeless will not prevent a...

No, switching to tubeless will not prevent a heat-related blow off.

Heat does not cause tubes to fail. Heat causes tire blow offs.

Heat:

increases the temperature of the pressurized air
...
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