DAVE-W- Posted December 20, 2009 Share Posted December 20, 2009 Time to fork out on new tyres. Whats the largest tyres that can be fitted safely to uk spec 9.5 rears. The 255's werent doing the job so is 265 or 275 an option? cheers Dave Quote Link to comment Share on other sites More sharing options...
sdistc Posted December 20, 2009 Share Posted December 20, 2009 If I recall correctly, 265s are the widest to fit perfectly on 9.5" rims (it's what i have on my 9.5 fronts). 275 will fit, but I think overhang a little. Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted December 20, 2009 Share Posted December 20, 2009 i run 275/40/17 nice fit. i would like to see 315/35/17 think that would be the widest Quote Link to comment Share on other sites More sharing options...
michael Posted December 20, 2009 Share Posted December 20, 2009 (edited) I used to run 275/35/18's on my standard 17's. Edit: I didn't really, that would be silly, see below... I'm not even drunk Edited December 20, 2009 by michael Caught "the retard" for a moment. (see edit history) Quote Link to comment Share on other sites More sharing options...
Scott Posted December 20, 2009 Share Posted December 20, 2009 i run 275/40/17 nice fit. i would like to see 315/35/17 think that would be the widest Your speedo will be a fair bit out with that profile bud. Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted December 20, 2009 Share Posted December 20, 2009 gps 95mph speedo 100mph thats with 245/45/17 front and 275/40/17 rear. 315/35/17 is a hard size to come by Quote Link to comment Share on other sites More sharing options...
Porky1978 Posted December 20, 2009 Share Posted December 20, 2009 Expensive too!! http://www.camskill.co.uk/products.php?plid=m4b0s531p0 Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 20, 2009 Share Posted December 20, 2009 Time to fork out on new tyres. Whats the largest tyres that can be fitted safely to uk spec 9.5 rears. The 255's werent doing the job so is 265 or 275 an option? cheers Dave the key to this is to buy quality, i suspect the 255's you had were not the best, a quality 255 tyre will still completely out perform any blogs brand 265/275 regardless of how wide they are Quote Link to comment Share on other sites More sharing options...
spidermonkey Posted December 20, 2009 Share Posted December 20, 2009 I used to run 275/35/18's on my standard 17's. did they not come off? Quote Link to comment Share on other sites More sharing options...
michael Posted December 20, 2009 Share Posted December 20, 2009 did they not come off? No, the wheels never went round properly for some reason. *blushes* I went mental it seems, they were 275/40/17, the other size is for the TTE wheels. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted December 20, 2009 Share Posted December 20, 2009 315 on 9" rims? - Are you sure???? lol @ Michael! Quote Link to comment Share on other sites More sharing options...
sdistc Posted December 20, 2009 Share Posted December 20, 2009 i run 275/40/17 nice fit. i would like to see 315/35/17 think that would be the widest Do you mean that the 315 is the widest that will fit the stock arches? Because a 315 tyre will not be the best fit for a 9.5 inch wide rim. Quote Link to comment Share on other sites More sharing options...
AndyT Posted December 20, 2009 Share Posted December 20, 2009 265 / 35 keeps your speedo on the legal side of speed. 80 on speedo = 78 on gps etc. 3000 rpm on a TT. 8.5 front gets a 235 / 40 both sizes are spot on. Anything else will affect your handling. Not a big deal if you're on the ball all the time but I like to relax a little on the longer journeys. Quote Link to comment Share on other sites More sharing options...
spidermonkey Posted December 20, 2009 Share Posted December 20, 2009 no, the wheels never went round properly for some reason. Quote Link to comment Share on other sites More sharing options...
Wez Posted December 20, 2009 Share Posted December 20, 2009 What tires were you running, what suspension is fitted and when was the geo last checked, these can all cause bad handling? FYI I run stock 17" and stock tire sizes on a track car with a little under 600hp Quote Link to comment Share on other sites More sharing options...
David P Posted December 20, 2009 Share Posted December 20, 2009 You will find this a mine of information. http://www.carbibles.com/tyre_bible.html Quote Link to comment Share on other sites More sharing options...
AndyT Posted December 20, 2009 Share Posted December 20, 2009 You will find this a mine of information. http://www.carbibles.com/tyre_bible.html Excellent. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted December 21, 2009 Share Posted December 21, 2009 im running 275/35/18 on the rear. its not an exact mesurement though as the 265 pirellis i was runnning on my 9.5 were actually 271mm shoulder to sholuder and the 275 contis im now using are 270mm shoulder to shoulder , Quote Link to comment Share on other sites More sharing options...
Terminator Posted December 21, 2009 Share Posted December 21, 2009 Speedo readings don't have to out when you change tyre size. I used to regularly swap between stock wheels and tyre sizes up to to 295/18's and got fed up having a wildly inaccurate speedo readings. OK I could try to remember how far out the speedo was on each set of tires or just use GPS, but I wanted a speedo I could trust to keep me point free. I discovered this speedo adjuster,fitted it, set the speedo up against a GPS speed reading. My speedo is now the most accurate it has ever been from 30 mph into high 3 figures. As an additional bonus I can flick over to Kph if needed. Once I had the settings it took about 5 seconds to reset the speedo when ever I swapped wheels, as the unit stores two settings. I highly recommend this product. Quote Link to comment Share on other sites More sharing options...
David P Posted December 21, 2009 Share Posted December 21, 2009 That sounds a useful piece of kit, do you have a link to this? According to the 'bible' 285 35's are the exact RR on 18's, only problem is, Vredestein don't make that size, so went with the 275's because the 295's were too wide for the wheel. Quote Link to comment Share on other sites More sharing options...
DAVE-W- Posted December 21, 2009 Author Share Posted December 21, 2009 So from what your sayin 265 should be the largest as 275 will overhang and seems to have caused issues for people. I found some nice cheap falkens 265 fk-452's for £110. Not wantin to spend alot so theyd do Cheers people Much appreciated Dave Quote Link to comment Share on other sites More sharing options...
AndyT Posted December 21, 2009 Share Posted December 21, 2009 So from what your sayin 265 should be the largest as 275 will overhang and seems to have caused issues for people. I found some nice cheap falkens 265 fk-452's for £110. Not wantin to spend alot so theyd do Cheers people Much appreciated Dave Nice price. Excellent all round tyre. Quote Link to comment Share on other sites More sharing options...
paul mac Posted December 21, 2009 Share Posted December 21, 2009 The 255's werent doing the job so is 265 or 275 an option? I found some nice cheap falkens 265fk-452's for £110. Not wantin to spend alot ah so it was just cheap that you were after and grip wasn't an issue after all Quote Link to comment Share on other sites More sharing options...
David P Posted December 21, 2009 Share Posted December 21, 2009 (edited) I have 9.5J 18 rear, and believe me, the max tyre size poss is 285 35 18, which also gives the perfect RR. But I wanted Vredestein Ultrac Sessanta's and they only come in either 275 or 295. I tried the 295's, but they 'balloon up' and increase the RR by over 10% because they are 1 size too large. Made the car look like a drag racer. The 275's have a RR of .25% less I think? Check the bible. http://www.carbibles.com/tyre_bible.html I used a disc cutter to trim back the lip on the rear arches to half way through the spot welds. Re-painted the lips and waxoiled behind. This sounds viscous, but is no big deal. Takes about 5 mins each side to trim, and about the same time to repaint. There is now plenty of room and no fouling issues. But this is dependent on the offset of the wheel. Without getting my tape measure out and laying in the snow, I can't remember what my wheels offset are. Edited December 21, 2009 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
DAVE-W- Posted December 21, 2009 Author Share Posted December 21, 2009 Grip is an issue Paul. A cheap 265 has more grip than a cheap 255 Only £10 difference between a shit 255 and 265 as opposed to far more £££ for a quality 255. Id say im a genius Quote Link to comment Share on other sites More sharing options...
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