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-   -   New Road Tire Design (https://www.bikeforums.net/road-cycling/431200-new-road-tire-design.html)

hxzero 06-19-08 12:47 AM

Message to OP: You fail. Miserably.

Scatman 06-19-08 02:39 PM

Quote:

Originally Posted by merlin55 (Post 6904323)
SNIP....siping makes sense on vehicle tires where you can exceed the magic hydroplane speed of 10.6 times the square root of the air pressure in PSI. At a 100 psi in you tire, you don't have to worry until 106 mph, when riding in a heavy rain. SNIP....

Merlin, I was wondering what you are basing this (formula) on, since it's such a blanket statement and does not take into consideration tread depth or design, i.e. the tire's ability to pump water away from the contact patch.

fly:yes/land:no 06-19-08 03:14 PM

this is not novel. this is not non-obvious. this is useful. typically, to patent, you must have all of these. good luck getting that through the patent office. methinks it is a no go, but i have a very preliminary knowledge of ip law.

recursive 06-19-08 03:46 PM

Quote:

Originally Posted by wsherman (Post 6906517)
you have to keep in mind that asphault is not very smooth. Slicks work so well because the texture needed to create friction is provided by the road surface. Your lines on the rubber are relatively insignificant compared to the profile of the road surface.

Ok, I was wondering why track bikes had knobby tires. That explains it.

ProFail 06-19-08 03:55 PM

Quote:

Originally Posted by recursive (Post 6910621)
Ok, I was wondering why track bikes had knobby tires. That explains it.

What?

Track bikes have slicks as well. (mod edit)

AEO 06-19-08 04:20 PM

Quote:

Originally Posted by Scatman (Post 6910200)
Merlin, I was wondering what you are basing this (formula) on, since it's such a blanket statement and does not take into consideration tread depth or design, i.e. the tire's ability to pump water away from the contact patch.

probably from here: http://sheldonbrown.com/tires.html#hydroplaning

steaktaco 06-19-08 04:42 PM

To correct the OP even further: that's a cross-section, not a street's-eye view. A street's-eye view would be the contact patch.

wsherman 06-21-08 01:16 AM

"If you examine a section of asphalt or concrete, you'll see that the texture of the road itself is much "knobbier" than the tread features of a good quality road tire. Since the tire is flexible, even a slick tire deforms as it comes into contact with the pavement, acquiring the shape of the pavement texture, only while in contact with the road." - Sheldon Brown

A velodrome without banking would make an interesting race, (mod edit) .

recursive 06-21-08 05:00 AM

Quote:

Originally Posted by wsherman (Post 6919176)
"If you examine a section of asphalt or concrete, you'll see that the texture of the road itself is much "knobbier" than the tread features of a good quality road tire. Since the tire is flexible, even a slick tire deforms as it comes into contact with the pavement, acquiring the shape of the pavement texture, only while in contact with the road." - Sheldon Brown

A velodrome without banking would make an interesting race, (mod edit).

Oh snap, I just got served. Multi-served.

Heh. :o

I withdraw everything I said that was wrong.

dprayvd 06-21-08 09:20 AM

...

jaxgtr 06-21-08 10:49 AM

OK, boys and girls, lets keep the subject on topic and less about the individuals, did some thread clean

haimtoeg 06-21-08 01:04 PM

Quote:

Originally Posted by AEO (Post 6910816)

Sheldon Brown is quoting an aviation formula.


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