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Poll

What width of tyre people are using

less than 2"
0 (0%)
2" - 2.24"
0 (0%)
2.25" - 2.49"
1 (12.5%)
2.5" - 2.74"
2 (25%)
2.75" - 2.99"
3 (37.5%)
3" - 3.24"
0 (0%)
3.25" +
2 (25%)

Total Members Voted: 6

Author Topic: Tyre width  (Read 384 times)

StefanN

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Tyre width
« on: 14 June 2020, 06:02:28 pm »
Thought it would be interesting to find out what width tyres people are using.

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TheGiantTribble

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Re: Tyre width
« Reply #1 on: 14 June 2020, 09:27:18 pm »
Two and a half at the front, three at the back

Chris Brown

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Re: Tyre width
« Reply #2 on: 15 June 2020, 10:02:16 am »
Same as Bill 2.25 front 3.00 rear (but only one of them  :D). I'm going with 2.50 all round on future builds, having experienced the two wheeling effects of too much grip.

Edit: Don't know how 2.25 got posted should have been 2.50!
« Last Edit: 22 July 2020, 08:49:45 am by Chris Brown »

TheGiantTribble

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Re: Tyre width
« Reply #3 on: 15 June 2020, 11:07:17 am »
Chris, can't help but wondering...if you increased tyre pressure on your one rear tyre, would that not reduce grip somewhat, since less of the tyre would be in contact with the road?

Douglas Anderson

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Re: Tyre width
« Reply #4 on: 15 June 2020, 11:37:54 am »
2.50 front; 2.75 rear

Ron

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Re: Tyre width
« Reply #5 on: 15 June 2020, 12:19:26 pm »
Grip is a function of the friction coefficient and resistance to tyre distortion, the grip coefficient is a fixed ratio determined by the rubber compound the components are force applied down v force required to break the frictional grip , for a road tyre its normally about 0.9 , tyre distortion effects how much the tyre will crab away from the direction of travel when put under side load whilst rolling and it's mainly influenced by aspect ratio.
As a summary
CoF determines the cornering force required.
Tyre aspect ratio determines the rate at which it will break away, an 80% tyre will gradually break away where the equivalent 45% tyre will break away more suddenly.

Graham Hill

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Re: Tyre width
« Reply #6 on: 15 June 2020, 01:42:39 pm »
2.75. Weee, this is fun!

Chris Brown

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Re: Tyre width
« Reply #7 on: 15 June 2020, 02:34:05 pm »
I went down to the 3.00 from a modern grippy 120 which was virtually all rubber in the centre, it was much better last time out. I will though play with tyre pressures when I next get to play. of course the harder front suspension helped too.

Slack Alice

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Re: Tyre width
« Reply #8 on: 17 June 2020, 07:16:07 pm »
Mine are 2.5” all round...rims are 1.6”.

ChrisS

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Re: Tyre width
« Reply #9 on: 18 June 2020, 07:34:58 am »
2.5" all round on mine.

GeoffM

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Re: Tyre width
« Reply #10 on: 18 June 2020, 04:59:03 pm »
2.75 all round, cheers, Geoff

Adrian

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Re: Tyre width
« Reply #11 on: 20 July 2020, 09:13:28 pm »
2.5 front and rear.