fatcat Posted February 25, 2003 Share Posted February 25, 2003 anyone got a recommendation on slicks - make, costs, etc ? ( probably 7x13 front 9x13 rear) thanks in advance fc Link to comment Share on other sites More sharing options...
fatcat Posted February 26, 2003 Author Share Posted February 26, 2003 BTTT...surely everyone can't be as ignorant as me ? 😬 Link to comment Share on other sites More sharing options...
F355GTS Posted February 26, 2003 Share Posted February 26, 2003 I'm using used Avons ex the SLR race series, these are not being used from this year on, rears I believe are still 9" but 22" diameter, fronts are still 7 x 13 but a different construction. Used I've been paying £25 for the 7" and £35 for the 9's Mark Link to comment Share on other sites More sharing options...
fatcat Posted February 26, 2003 Author Share Posted February 26, 2003 Hi Mark, that sounds like an excellent price, where do you get the used slicks from ? Link to comment Share on other sites More sharing options...
F355GTS Posted February 26, 2003 Share Posted February 26, 2003 FC You have mail Mark Link to comment Share on other sites More sharing options...
Chelspeed Posted February 26, 2003 Share Posted February 26, 2003 I spoke to BMTR in Brummy about slicks for my car which is on R500 size Barnby wheels which are 6.5J fronts and 8.5J rears. They recommended Avons, not surprisingly as they are main dealers, for this size wheel thy said 7.0/21.0-13 for the fronts and 8.2/22.0-13 for the rears. They thought I should go wider on the back but didc't think wider tyres would fit 8.5 inch rims and I don't think wider wheels will go on without fouling the anti roll bar or sticking out from under the arches. Do the SLR boys really use 9.0 inch slicks on the 8.5 inch wheels? Prices on their handout are 132 for fronts and 148 for rears. No idea if this is negotiable or whatever, plus vat though. You'd need to talk to BMTR about what compounds are suitable for what form of competition. The Caterham race slicks are a very hard compound for a race tyre as they're a control tyre. Good for a season of track days perhaps but not for sprinting or hillclimbing. Link to comment Share on other sites More sharing options...
F355GTS Posted February 26, 2003 Share Posted February 26, 2003 Chelspeed 9.0 x 20 x 13 were the std tyre for the SLR series on the 8.5 SLR rims, I'm running a set of these with no problems also two sets of Compomotive rims with 9.0 tyres and same offsets without fouling ARB Mark Link to comment Share on other sites More sharing options...
Paul Ranson Posted February 26, 2003 Share Posted February 26, 2003 Nine inch rims will fit under standard rear arches. They will prevent the use of the 'over the diff' arb. It may be worth discussing radial slicks with BMTR, for hillclimb/sprint anyway. DaveK is almost certainly a man with good info in this area. Paul Link to comment Share on other sites More sharing options...
fatcat Posted February 27, 2003 Author Share Posted February 27, 2003 Guys, thanks for the info, and Mark thanks for the email... This is going to sound really stupid, but when a spec is 9x20x13, what is the 20 bit ? - just when I understand ordinary tyre specs with the bizarre mixture of inches, millimetres and percentages, it all changes when I go racing Link to comment Share on other sites More sharing options...
Fast Westie Posted February 27, 2003 Share Posted February 27, 2003 9x20x13 9" wide 20" diameter 13" wheels The latest control slicks for the SLRs (or R400s) are 8.2x22x13 rear and a different design of 7x20x13 for the front. The new fronts are supposed to reduce 'pattering' when pushing hard and the rears allow the power to be put down earlier in the corner. The car in front is a Westfie1d Link to comment Share on other sites More sharing options...
Paul Ranson Posted February 27, 2003 Share Posted February 27, 2003 It seems conventional to quote crossply sizes in inches and radial in mm, but always width and diameter rather than width and aspect ratio. So I used to run 9.0/21.0-13 on the front and now I run 210/550R13. I think the Avon web site carries a lot of detail regarding actual sizes, circumferences etc, which will make everything clear... Paul Link to comment Share on other sites More sharing options...
fatcat Posted February 27, 2003 Author Share Posted February 27, 2003 thanks guys Link to comment Share on other sites More sharing options...
fatcat Posted February 27, 2003 Author Share Posted February 27, 2003 Sorry to keep going on about tyres... any views on the following: 1. Avon or Yoko slicks ( Yoko are cheaper !) ? 2. 6.5/20/13 or 7/20/13 on the the front ? Link to comment Share on other sites More sharing options...
yankeedoodoo Posted March 1, 2003 Share Posted March 1, 2003 Hoosier are also worthy of your consideration; subject to availability. The cantilevered slicks can be run on a 7 1/2" rim and are available in a variety of compounds with 9 1/2" wide treads. Really sticky stuff for formula cars or 7s ❗ Link to comment Share on other sites More sharing options...
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