Whats the widest rears you can have?

Basically wanting to know whats the widest wheel size realistically without detrimenting the cars handling. I know a few people in the states run with 11.5's on the rear. What have people on here got and what are your views?

ive got 9.5/19's on mine

whatever 315's are in inches, they are a horrible drive

whatever 315's are in inches, they are a horrible drive

In what way?...

whatever 315's are in inches, they are a horrible drive

Yep, 11.5x18 inch rears on Robs car. It's not too happy on them, but that isn't helped by the front suspension setup and lack of a proper geo. My old car on stock 17's would turn in easier and have far more grip out of corners, with only 255 rear tyres.

Personally I wouldn't go over a 10inch rear wheel on 17's, tried absolutely loads of them over the years and always found the stock 9.5x17 the nicest in terms of grip and drivabilty. Going up to 18's will make it a little less forgiving but will make it easier if you like to drift.

Offset also makes a massive difference. Get it even slightly wrong and it makes a huge difference when coming out of a corner under power.

All depends what you use the car for and how well you can drive it.

In summary, you need to take into account the "whole package". There's no single value you can use as a guide as to what is the maximum width, every other factor has to be counted to make the right choice. I.e. fitting 11.5inch rears on a 20 inch wheel will need the arches removing.

Well i must say i love the 'trying to pull you into the verge on a high camber' and the swaying in and out of tramlines on the motorway.......

On some days its an arm workout in itself just trying to get onto a decent road

homer when you refer to offsets making a huge difference how do mean exactly?

Are you looking for info in terms of road handling or track?

(just so this doesn't get confusing!)

Yep, 11.5x18 inch rears on Robs car. It's not too happy on them, but that isn't helped by the front suspension setup and lack of a proper geo. My old car on stock 17's would turn in easier and have far more grip out of corners, with only 255 rear tyres.

 

Personally I wouldn't go over a 10inch rear wheel on 17's, tried absolutely loads of them over the years and always found the stock 9.5x17 the nicest in terms of grip and drivabilty. Going up to 18's will make it a little less forgiving but will make it easier if you like to drift.

 

Offset also makes a massive difference. Get it even slightly wrong and it makes a huge difference when coming out of a corner under power.

 

All depends what you use the car for and how well you can drive it.

 

In summary, you need to take into account the "whole package". There's no single value you can use as a guide as to what is the maximum width, every other factor has to be counted to make the right choice. I.e. fitting 11.5inch rears on a 20 inch wheel will need the arches removing.

Helpfull as always

The reason I ask is im making plans for my next supra project and I'm wanting to have something similar to the look they have over in the states where its all pretty much stock with a nice set of wheels. But was wondering if there wheel set ups are only suited to their straight roads and drag racing. It's something that im not all that clued up on. I wouldn't be fitting anything larger than 18's

This is what i like:cool:

Are you looking for info in terms of road handling or track?

(just so this doesn't get confusing!)

My plan is for a fast street car. Single turbo

ive got 13' on the rear of mine. had to get the arch's taken out and new fenders fitted

My plan is for a fast street car. Single turbo

Comparing the US "look" with UK "roads" is a fundamental conflict. US roads are very straight, very smooth and in general have a lovely warm climate to make it grippy. Uk roads are twisty, have poor surfaces, bumps, pot holes, are often wet, etc.

The US guys get away with running their suspension very low, wide wheels and tyres and grippy rubber because of the conditions and roads the cars are driven on. We don't have that luxury and need to adjust our wheel, tyre and suspension choice accordinly.

However, as shown by the likes of JamieP, that can be overcome by a very capable driver (though 95% of us just don't have the skills and experience to drive - or want to drive - a car in that way on a public road). IMO take a look at the 'num brothers cars and see what makes a very, very fast road and track car.

Comparing the US "look" with UK "roads" is a fundamental conflict. US roads are very straight, very smooth and in general have a lovely warm climate to make it grippy. Uk roads are twisty, have poor surfaces, bumps, pot holes, are often wet, etc.

 

The US guys get away with running their suspension very low, wide wheels and tyres and grippy rubber because of the conditions and roads the cars are driven on. We don't have that luxury and need to adjust our wheel, tyre and suspension choice accordinly.

 

However, as shown by the likes of JamieP, that can be overcome by a very capable driver (though 95% of us just don't have the skills and experience to drive - or want to drive - a car in that way on a public road). IMO take a look at the 'num brothers cars and see what makes a very, very fast road and track car.

Num Brothers?

Num Brothers?

Little num and bignum

Search in the multimedia section for threads started by either of them.

Littlenum and bignum

Oh I never realised they were brothers i just never really thought about it. Ill have a butchers..Thanks again

Num Brothers?

big num / little num on here , iv seen big num on track , verry impressive

Im sure in jamiep's garage his old red car had 12" rears

the offset thing is key though. Im still trying to find what offset i need for 18x9.5" front wheels !!

Im sure in jamiep's garage his old red car had 12" rears

 

the offset thing is key though. Im still trying to find what offset i need for 18x9.5" front wheels !!

http://www.mkivsupra.net/vbb/showthread.php?t=184490

Basically the front wheel width is to wide to compensate You should have got narrower ones if you bought some already. If not, then buy some narrower ones

245/45 with a 50 offset would be a very close match to stock, but that's too narrow for the wheel.

255/45 with a 38 offset is getting closer but they are still going to be stretched for a front wheel and will wear terribly.

265/40 is getting towards the right size tyre to use on a front wheel for the wheel width. It'll need a 40 offset which is closer to fitting that width wheel but will likely rub the arch on partial lock.

It's a compromise whatever you choose, just make sure it gets a professional geo after fitting.

Cheers dude will have a proper looksy at that tomoro!

That must have taken you AGES mate

Jola's Supra have 315's on the rear. Problem was, that they was sticking out from arches and was slightly tearing them on uneven road. So my friend who happen to be bodyworker and excellent welder done arch conversion. He cut out external arches, then move them few cm out and weld small metal plates around on the top and also at the bottom. Then it was fibreglass, a lot of sanding, tons of dust around and here it is, just needs painting. We also used veilside skirts (well at least rear halfs of them ) and blended them to arches at the rear and original skirts at the front.

http://www.mkivsupra.net/vbb/showthread.php?t=184490

 

Basically the front wheel width is to wide to compensate You should have got narrower ones.

 

245/45 with a 50 offset would be a very close match to stock, but that's too narow for the wheel.

 

255/45 with a 38 offset is getting closer but they are still going to be strecthed for a front wheel and will wear terribly.

 

265/40 is getting towards the right size tyre to use on a front wheel for the wheel width. It'll need a 40 offset which is closer to fitting that width wheel but will likely rub the arch on partial lock.

thanx again. I havent bought them yet but the alloys looks so much better in a 9.5" or wider! How badly is the wear you refer to in option 2?

That must have taken you AGES mate

Just did an edit of the post to explain more. And yes, it took fooking ages to make that

Jola's Supra have 315's on the rear. Problem was, that they was sticking out from arches and was slightly tearing them on uneven road. So my friend who happen to be bodyworker and excellent welder done arch conversion. He cut out external arches, then move them few cm out and weld small metal plates around on the top and also at the bottom. Then it was fibreglass, a lot of sanding, tons of dust around and here it is, just needs painting. We also used veilside skirts (well at least rear halfs of them ) and blended them to arches at the rear and original skirts at the front.

Just make sure you get the geo done by a decent specialist (wheels in motion, and the like) otherwise it will handle like a shopping kart

Out of interest Darryl how much is a decent Geo setup? Think robs can do with one now its properly running, that car makes me appreciate the smoothness of a standard NA

Just make sure you get the geo done by a decent specialist (wheels in motion, and the like) otherwise it will handle like a shopping kart

Supra is going to back to Poland at the end of September for painting and winter sleep in heated garage, it will have geo done then. I've done few runs and didn't notice any handling problems just yet, but then again - I wasn't driving fast or hard, just few relaxing trips to check car around.

Out of interest Darryl how much is a decent Geo setup? Think robs can do with one now its properly running, that car makes me appreciate the smoothness of a standard NA

Wheels in motion in Watford are about £200 dependant on how much adjustment is needed and if any bolts are seized. It'll be the best money ever spent on the car, beleive me