wesmi01 Posted February 18, 2003 Share Posted February 18, 2003 What is the optimum tyre width to run on 18's front and back? Is wider always better? Quote Link to comment Share on other sites More sharing options...
nick_karkie Posted February 18, 2003 Share Posted February 18, 2003 I asked the same question and Ibrar who knows his stuff recommended 9" on the fronts and 10" on the back, my 19x9,19x10's will be arriving shortly from Ibrar.....ask him what he thinks and his advice is sound! Quote Link to comment Share on other sites More sharing options...
nick_karkie Posted February 18, 2003 Share Posted February 18, 2003 sorry for me confusing you....I am talking wheel width...tyre width depends whether your car will fit big tyres. what width wheels are you getting 18x? Quote Link to comment Share on other sites More sharing options...
nick_karkie Posted February 18, 2003 Share Posted February 18, 2003 experts talk about a rolling radius. Your car will definitely fit 265 width tyres on the back and 245's on the front, but 275's depend on each car I was told, and whether your arches have been rolled. Look up Paul Whiffin or Ibrar Jabbar in the members section Quote Link to comment Share on other sites More sharing options...
Mohammed_A Posted February 18, 2003 Share Posted February 18, 2003 I am running 245/40's up front and 275/35,this is optimum for a 400hp car. Also bigger isn't always better,increace in width will also up rolling resistance,which will affect your MPG and high speed cruiseabilty.And more road and wind noise! Cheers! Quote Link to comment Share on other sites More sharing options...
wesmi01 Posted February 18, 2003 Author Share Posted February 18, 2003 Currently have 235's on 9's on the front and 265's on 10's on the back, just woundered if it's worth going larger after i wear these babies out!!!! Quote Link to comment Share on other sites More sharing options...
nick_karkie Posted February 18, 2003 Share Posted February 18, 2003 well if the bigger tyres will fit under the arches then go for it cause it offers better traction. Quote Link to comment Share on other sites More sharing options...
Mohammed_A Posted February 18, 2003 Share Posted February 18, 2003 wesmi01 I don't see any harm in going bigger,what spec are you mate? Quote Link to comment Share on other sites More sharing options...
wesmi01 Posted February 18, 2003 Author Share Posted February 18, 2003 I belive the 400 mark!!! Quote Link to comment Share on other sites More sharing options...
Mohammed_A Posted February 18, 2003 Share Posted February 18, 2003 Then go bigger,it will imporve high speed conering(i think),also anything to help imporve traction.I find the 275's great and they don't spin as much as the 265's,also make it a little less tail happy.("LITTLE") Cheers! Quote Link to comment Share on other sites More sharing options...
randy Posted February 19, 2003 Share Posted February 19, 2003 I would suggest getting a really wide set up as the supra could really benefit from the extra traction!! especially if you are pushing over 400 horses! I use 18-9.5 with 275 up front and 18-11 with 295 rears and I get awesome traction. Takeoffs are a lot faster, braking is better and conering too is improved. Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted February 19, 2003 Share Posted February 19, 2003 Originally posted by randy I would suggest getting a really wide set up as the supra could really benefit from the extra traction!! especially if you are pushing over 400 horses! I use 18-9.5 with 275 up front and 18-11 with 295 rears and I get awesome traction. Takeoffs are a lot faster, braking is better and conering too is improved. 275 seem big up front whats it like on steering. and the 11" rims on rear do you have any problems with wheels sticking out or catching on arch. Quote Link to comment Share on other sites More sharing options...
wesmi01 Posted February 19, 2003 Author Share Posted February 19, 2003 Large!!!! Quote Link to comment Share on other sites More sharing options...
Roy Posted February 19, 2003 Share Posted February 19, 2003 i am currently running 245/40/18's in front and 285/35/18's on the rear and i can say that on bad tarmac ie central london - theres a whole lotta wrasslin' goin' on ! Quote Link to comment Share on other sites More sharing options...
B3any Posted February 19, 2003 Share Posted February 19, 2003 245 & 285 for me sat at home waiting for the new wheels. Quote Link to comment Share on other sites More sharing options...
Roy Posted February 19, 2003 Share Posted February 19, 2003 think i will eventually have to consider smaller width (and/or bigger profile) tyres and maybe even a size smaller rims to banish the handling gremlins i'm facing right now. i guess it is safe to assume that any change in suspension components will not affect this tramlining effect ? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 19, 2003 Share Posted February 19, 2003 Originally posted by Roy think i will eventually have to consider smaller width (and/or bigger profile) tyres and maybe even a size smaller rims to banish the handling gremlins i'm facing right now. i guess it is safe to assume that any change in suspension components will not affect this tramlining effect ? I have re posted something I wrote a while back, may help, or you may already have seen it, in which case, sorry Hmm, this will be controversial, but here goes. Most road cars haven't got good enough camber control to truly make good usage of ultra low profile tyres, so if you go up more than say 1 size in diameter on stock rims, and have to come DOWN on aspect ratio (sidewall height) handling suffers. Supras have already gone from 16 to 17 inch rims, to accommodate bigger UK / US brakes. Why do makers fit big diameter rims? Style. Ask any handling engineer, and if he is truthful he will say the cars are generally better on a higher profile tyre. If camber control is poor (and 90% of road cars roll too much to have good camber control) then they pick up the edges of ultra low profile tyres. However, when fitted from new, factory stock, the suspension engineers have hopefully tuned the whole of the suspensions kinematics and compliance to use said larger rims. It's a VERY different kettle of fish when the end user decides to bolt on some larger diameter rims, and leaves the rest of the suspension alone....The stock suspension bushings hysterisis is also too soft to effectively control the loadings from ultra low profile tyres, this is why a car designed to run on 50 or 55 profiles feels edgy and follows tyre ruts, surface breaks and camber changes so much when fitted with say 35 profile tyres. Until you start to radically modify a cars suspension to utilize ultra low profile tyres it's better, IMO, to stay with near stock wheel and tyre sizes. Reality check :- With respect a lot of drivers neither know nor care whether the handling is the same, better, or worse, so the above doesn't apply, they merely like the looks of certain style and size of wheels and tyres, and that's fine by me, but as you asked.... :-) Quote Link to comment Share on other sites More sharing options...
Roy Posted February 19, 2003 Share Posted February 19, 2003 thanks chris. i think i understand the crux of what you are getting at. if i may, can i ask what your suggestions would be as to what the best recourse is on this ? ie what are my options in trying to reign in this handling issue ? just for clarification, these rims/tyres were already on the car when i got it. from my limited knowledge of supras and experience garnered on test drives prior to purchasing, they don't really have major handling quirks and are quite staright forward in the handling department. thanks. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 19, 2003 Share Posted February 19, 2003 Originally posted by Roy thanks chris. i think i understand the crux of what you are getting at. if i may, can i ask what your suggestions would be as to what the best recourse is on this ? ie what are my options in trying to reign in this handling issue ? just for clarification, these rims/tyres were already on the car when i got it. from my limited knowledge of supras and experience garnered on test drives prior to purchasing, they don't really have major handling quirks and are quite staright forward in the handling department. thanks. I've come in on the tail end of this, but unless you have bigger than UK brakes why not just fit some stock 16 or 17 inch rims? Quote Link to comment Share on other sites More sharing options...
Roy Posted February 20, 2003 Share Posted February 20, 2003 yeah - having digested your earlier explanation, i was kinda/sorta coming to the very same conclusion (obviously it took a while longer to sink in). when i manage to thrash this set, then i will probably re-consider the issue of the 17"ers. or......might get cheeky and get bigger brakes and then whinge around with the excuse of having to change rims for another set of 18"ers (better stuff as in lighter but on better rolling stock - still a pipe dream though...). anyways, thanks for the sage advice. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 20, 2003 Share Posted February 20, 2003 Originally posted by Roy yeah - having digested your earlier explanation, i was kinda/sorta coming to the very same conclusion (obviously it took a while longer to sink in). when i manage to thrash this set, then i will probably re-consider the issue of the 17"ers. or......might get cheeky and get bigger brakes and then whinge around with the excuse of having to change rims for another set of 18"ers (better stuff as in lighter but on better rolling stock - still a pipe dream though...). anyways, thanks for the sage advice. Beg or borrow (but don't steal ) a set of stock rims and tyres and see if that cures your ills. Otherwise visit for a check out! Quote Link to comment Share on other sites More sharing options...
Roy Posted February 20, 2003 Share Posted February 20, 2003 will do so most assuredly at most point and thanks 4 the offer. goin' 2 boxhill ? Quote Link to comment Share on other sites More sharing options...
Alex Posted February 20, 2003 Share Posted February 20, 2003 Tramlining has alot to do with the tyre tread/construction not just its size. Quote Link to comment Share on other sites More sharing options...
Roy Posted February 20, 2003 Share Posted February 20, 2003 hi alex - agreed. believe i have some older dunlops on the front and newish falkens on the back. gotta wait for them to give up the ghost before switching. at least this gives me the excuse to shorten their lifespans by being sideways as much as possible ! great way to find out the handling characteristics of the car also. Quote Link to comment Share on other sites More sharing options...
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