Scooter Posted July 18, 2003 Share Posted July 18, 2003 Ok i've searched and read through numerous old threads on the subjects of widths offsets and tyre fitments etc. The incorrect fitting of after market alloys seems too happen alot. So pre alloy purchase i'm doing my research e.g. Read CW's contribution re >17's & low profiles not being ideal and also about less than 9-91/2" rears being 'wrong' 1) My new sup has 16x8's and 16x9's with 225's and 245's on respectively and the grip level is more than adequate. 2) Members with the 18" GS300 sport rims have 245's on the 8" fronts which i'm presuming is the standard lexus fitting. My query therefore is this, the idea of 8" wide wheels at the back is shunned, but whats the big deal if it has the correct offset and wears the same rubber as stock. e.g. what would be the negative effects with for example all 18x8" lexus rims with 225's Fr and 245's Rr. Link to comment Share on other sites More sharing options...
Doug Posted July 18, 2003 Share Posted July 18, 2003 I'm guessing for one, it would be tricky to fit 245 tyres on an 8" rim and secondly Toyota must of had their reasons for not making them equal widths in the first place? Link to comment Share on other sites More sharing options...
Supra_Al Posted July 18, 2003 Share Posted July 18, 2003 I believe a car is designed from the wheels/suspension upwards? So if designed with a bigger 'J' on the rear,why change the balance? If you compromise Toyotas design then handling and steering would have an adverse effect. Al. Link to comment Share on other sites More sharing options...
peter richards Posted July 18, 2003 Share Posted July 18, 2003 hi scoot m8 , the lexus fronts are 8.5 wide , which i think were standard fit to the gs 300sport , Link to comment Share on other sites More sharing options...
MONKEYmark Posted July 18, 2003 Share Posted July 18, 2003 Originally posted by Doug I'm guessing for one, it would be tricky to fit 245 tyres on an 8" rim and secondly Toyota must of had their reasons for not making them equal widths in the first place? i have 235 and 265 tyres on my 19x8" did not know nothing about wheels when i bought them. always the case of wheel sellers selling the wrong wheels for your car. got some stock wheels now, prefer them to 19`s 8 1/2" fronts and 9 1/2" rears at least they are the correct wheels for handling and size. Link to comment Share on other sites More sharing options...
Scooter Posted July 18, 2003 Author Share Posted July 18, 2003 Ok I know what your saying and it seems i was wrong re the lexus wheels being 8" only wide. Whilst I appreciate the point that mr toyota made it that way i.e. don't mess etc 235's are a definite standard fit to the fronts of standard 8" wide 17's, so I don't think there is much of an issue in fitting 245's to a 8" rim, is there? What i'm looking to find out is the actual difference you may feel / notice when driving between rear 245's on a 16x9 or 18x8? Would the handling balance be compromised any more than say having differing tyre makes front and back? Is the 245 tyre profile being rounded off by being put on a 8" wide rim and hence will provide less ultimate grip? How dramatic an effect does the unsprung weigh saving make? and all things being equal which wheel and tyre combo is likely to be the lightest? I know its not perfect / idea but how much worse will it be from the standard set up? Note i'm looking at 245 BHP (crank max) not 350+ like your average bpu uk spec car which the majority, that i've seen, still run on standard 255 rears. Link to comment Share on other sites More sharing options...
Scooter Posted July 18, 2003 Author Share Posted July 18, 2003 Monkeymark, looking back how bad were the 265's on the 8" rim, i'm only looking to put on 245's, so i should only experience a small degree of the bad effects. Also are you sure your stock front wheels are 81/2, i thought all stock fronts were 8"? Link to comment Share on other sites More sharing options...
Terminator Posted July 19, 2003 Share Posted July 19, 2003 Originally posted by Scooter Would the handling balance be compromised any more than say having differing tyre makes front and back? If you get the right combo I would say not. I have tried different combinations on stock 17" rims. SO2 all round, F1 front and SO3 Rears and F1 all round. At the moment there is not much in it between them. The F1 rears scream a bit on hard tight corners, I never had this with the SO3's or the SO2's. The F1 front SO3 rear combo gave the best confidence in the wet. As for sizes I think it is all about getting the optimum aspect ratio so that the side walls adds to your suspension characteristics and does not detract from it. Having used three sizes of wheel 16", 17" and 18" I would say the car handled better on the 17's and 18's. But all had wider rims at the rear. But this is subjective and does not follow the advice of those who really know about suspension and handelling ie CW, who advises no larger than 17" rims unless you go for suspension changes. Edit I cant find the link right now but I think Terry posted a link to Tirerack. There was a great calculator for optimim tires for rim widths. I think that would help you make your choice. Edit 2 Found this posted by Thorin I think http://www.blackstar.karoo.net/fitment.xls Link to comment Share on other sites More sharing options...
Scooter Posted July 19, 2003 Author Share Posted July 19, 2003 cheers for that teminator (and Thorin) very useful. Link to comment Share on other sites More sharing options...
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