Home  
Site Partners: SpotterGuides Veloce Books  
Related Sites: Your Link Here  

Go Back   TenTenths Motorsport Forum > Racing Talk > Racers Forum

Reply
 
Thread Tools Display Modes
Old 10 Dec 2009, 12:38 (Ref:2597255)   #1
Torque of the Devil
Rookie
 
Join Date: Nov 2009
Posts: 5
Torque of the Devil should be qualifying in the top 10 on the grid
Help with slick tyre sizes please

Hello,

The wheels on my race/track Evo take 235/40 18 standard road tyres.

What is the equivalent of these in a slick? - Due to their strange way of sizing I havent a clue.

For example...would 240/640/18 be okay?

Many thanks

Andy
Torque of the Devil is offline  
Quote
Old 10 Dec 2009, 13:33 (Ref:2597284)   #2
joss Ronchetti
Racer
 
joss Ronchetti's Avatar
 
Join Date: Dec 2007
United Kingdom
Great Glen, Leicester
Posts: 344
joss Ronchetti should be qualifying in the top 10 on the grid
Sounds about right, my car takes 235/40/17 in road tyres
235/610/17 in slicks (with slicks it the sidewall height is not a percentage (eg 35/40/45) its the actual height in millimetres-610)
joss Ronchetti is offline  
Quote
Old 10 Dec 2009, 13:50 (Ref:2597300)   #3
graham bahr
Veteran
 
graham bahr's Avatar
 
Join Date: Jan 2003
England
cambs
Posts: 2,071
graham bahr should be qualifying in the top 10 on the gridgraham bahr should be qualifying in the top 10 on the grid
yes as joss says it sounds about right,

slicks are sized only slightly different to road tyres, the only difference being the middle number which is actually the outside diameter of the tyre
graham bahr is offline  
__________________
AKA Guru

its not speed thats dangerous, just the sudden lack of it!
Quote
Old 10 Dec 2009, 17:14 (Ref:2597369)   #4
Torque of the Devil
Rookie
 
Join Date: Nov 2009
Posts: 5
Torque of the Devil should be qualifying in the top 10 on the grid
Finally cleared that one up, thats great

Thank you very much

Andy
Torque of the Devil is offline  
Quote
Old 10 Dec 2009, 17:31 (Ref:2597376)   #5
COLIN STUBBS
Veteran
 
COLIN STUBBS's Avatar
 
Join Date: Sep 2004
United Kingdom
Louth.Thats the one near Cadwell
Posts: 579
COLIN STUBBS should be qualifying in the top 10 on the grid
This is a good spot to check sizes etc....
http://www.dunlopdriversclub.co.uk/t.../singleMarque/
COLIN STUBBS is offline  
Quote
Old 11 Dec 2009, 16:16 (Ref:2597992)   #6
phoenix
Veteran
 
phoenix's Avatar
 
Join Date: Jul 2005
European Union
Posts: 1,981
phoenix should be qualifying in the top 5 on the gridphoenix should be qualifying in the top 5 on the grid
From my experience, the first 3 numbers on a race tyre are pretty close to the actual tread width of the tyre. The tread with is normally no less than this number and quite often a bit wider than this number.

With a road tyre the first number is the section width - the overall width of the inflated tyre fitted to the correct size rim measured at it's widest point. Consequently a 235 road tyre will usually have a narrower tread than a 235 race tyre.

An example:

A 240/640/18 Avon racing radial which has a section width of 267 and a tread width of 244.

http://www.avonracing.com/radial_page.aspx

A 265/35/18 Avon road tyre has a section width of 271 and a tread width of 235.
A 225/40/18 Avon road tyre has a section width of 230 and a tread width of 203

It seems that across all competition tyre manufactureres, the optimum rim specified is the either the same or wider than the width of the tread, so a racing tyre that suits your rims would be between a 215 and a 225 - i.e. a tread width of approximately 8.5" - 9". Any wider and the tread will 'overhang' the rim width, which could lead to some odd handling when cornering.
phoenix is offline  
Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wheel and tyre sizes? XKRacer Racing Technology 18 11 Oct 2009 22:12
Tyre Sizes TNSL Kart Racing 2 2 May 2008 13:32
Another 'slick' thread Marbot Formula One 45 18 Apr 2008 21:28
Hakkinen and slick willie DavidStHubbins Formula One 3 8 Jul 2002 16:36
Will slick tyres ever be re-introduced JeremySmith Formula One 8 29 May 2001 10:57


All times are GMT. The time now is 12:28.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Original Website Copyright © 1998-2003 Craig Antil. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2004-2021 Royalridge Computing. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2021-2022 Grant MacDonald. All Rights Reserved.