Steve Gee Posted July 20, 2001 Share Posted July 20, 2001 I've recently upgraded from the standard 16"s, to a set of 18"s with 235/40's on the front and 255/35's on the rear. Any suggestions as to what the tyre pressures should be? It feels a little skittish, especially on a light fuel load. My local tyre supplier and I played around a bit, going round the block with different pressures and the best set-up found was 32 in the front and 36 in the rear. Any comments welcomed. Steve Link to comment Share on other sites More sharing options...
Doughie Posted July 20, 2001 Share Posted July 20, 2001 Whatever works Steve ! The 18" WILL feel quite different to 16" and it does not surprise me that it feels a bit skittish by comparison. They're lower profile, and the sidewalls will be stiffer so effectively you've got less suspension compliance and that means it will feel quite a bit harder due to the lower profile tyres absorbing much less of road bumps etc. I think you'll get used to it. Tyre pressures are a fairly personal thing, but it sounds like you're in the right ball-park. cheers Link to comment Share on other sites More sharing options...
Guest Ash Posted July 21, 2001 Share Posted July 21, 2001 Now that *is* amazing. Because when I did an 18" wheel swap I played around with various settings and 32 front 36 rear seemed about the best for me too. Yours, J Link to comment Share on other sites More sharing options...
Phil Posted July 23, 2001 Share Posted July 23, 2001 I'm running 34psi all round and it seems OK, I upped it a couple of psi on the track as well. I think I'll try out your recommendations and see if there is much difference. Link to comment Share on other sites More sharing options...
Alex Posted July 23, 2001 Share Posted July 23, 2001 I've got mine 255 ZR18 rears at about 34psi. Just a shade light to try to keep good grip in the wet conditions we've been having recently. The front 235's I have at about 36psi as I like the front end to feel alive! Link to comment Share on other sites More sharing options...
Phil Posted July 23, 2001 Share Posted July 23, 2001 You might get heavy wear in the centre with 36psi though. I'd keep an eye on the tread. Link to comment Share on other sites More sharing options...
Alex Posted July 24, 2001 Share Posted July 24, 2001 Am doing, I can't afford new tires right now. Link to comment Share on other sites More sharing options...
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