Wheels And Tyres

[greenmac80]

littleredspirit..

 

i have the clearance mate i've flaired my guards and i have 280mm of usable space. and the 10" is 257mm ish i believe so thats not a problem. and the wheels are going to be custom built to fit exactly how i want them.

 

the understeer would be a problem but... i do have neg 2.5 deg camber so perhaps that will even it all out?

 

well either way i've been convinced to stick with 8" i can't get a tyre to suit the 10" as it turns out. well perhaps i can but its waaay exxy.

 

so i'll stick with 8" with a 205/50 r15 maxxis mav1 which apparently is not far off being as good as the toyo proxes...

 

and being maxxis i get them at cost price.

 

 

 

on a side note.... IF i had coilovers with cambertops i could use my stock rolla arms instead of these sigma ones and then i could run 10" all around.

 

 

[anastasios]

was there any mention of what car you have?

[greenmac80]

KE30

[Raven]

Will you be getting the extra track width engineered?

[greenmac80]

nope. won't worry about it. i got told by regency themselves that you can't get track engineered in sa anyways.

 

also its not necessarily a regency defect.. so i will be keeping my standard wheels jst in case.

[styler]

tyre stretch and grip are not related in any way, in fact almost opposites...

 

8 inch wide rim + bead walls at 1/2 inch a side actually ends up being about 230mm total.

 

you generally have to overinflate stretched tyres so they don't pop off the bead

which not only makes the tyres too hard but also rounds the tyre footprint

for less contact area = less grip.

 

cars weight determines the contact area of the footprint at a set pressure,

the size and width of the tyre determines the shape of the footprint at that weight and pressure.

 

tyre stretch is for looks and less grip ie drift rears,

contact area and shape is for performance

Edited November 19, 2010 by styler

[LittleRedSpirit]

littleredspirit..

 

i have the clearance mate i've flaired my guards and i have 280mm of usable space. and the 10" is 257mm ish i believe so thats not a problem. and the wheels are going to be custom built to fit exactly how i want them. OK

the understeer would be a problem but... i do have neg 2.5 deg camber so perhaps that will even it all out?

Unlikely

 

well either way i've been convinced to stick with 8" i can't get a tyre to suit the 10" as it turns out. well perhaps i can but its waaay exxy.

 

so i'll stick with 8" with a 205/50 r15 maxxis mav1 which apparently is not far off being as good as the toyo proxes... Smart move bud.

 

and being maxxis i get them at cost price.

 

 

 

on a side note.... IF i had coilovers with cambertops i could use my stock rolla arms instead of these sigma ones and then i could run 10" all around.

Its not a good idea to base your wheel alignment settings around fitting wheels. This is the opposite of handling most times.

[styler]

i have the clearance mate i've flaired my guards and i have 280mm of usable space. and the 10" is 257mm ish i believe so thats not a problem. and the wheels are going to be custom built to fit exactly how i want them. OK

 

on the rears you are aware that the car does roll from side to side as you drive or are you just driving it in a straight line

and steering via throttle with the wind blowing you in the right direction every time?

on the fronts you will need a set of new wheel bearings every time you fill up with petrol because the loading

on the stub axle is way too far off and will prematurely overload the bearings if the rim is too far offset...

thats if you can steer the bloody thing, with that amount of scrub radius ie kingpin offset the steering

would be so heavy you would need old mate schwarzenegger in the passenger seat as power assist every corner...

not saying you can't do it, just that it wont work very well with 10 inch wide rims and stretched or not tyres...

basically in your setup 10 inch + stretched tyres = crap or 10 inch + proper tyres = crap

 

on another note this might help you out at a guess with tyres:

(all really depends tyre profile especially sidewall height)

 

proper fit = - 2 inch of rim width

maybe okay = - 1 inch

not sure = 0 inch

small stretch = + 1 inch

med stretch = + 2 inch

stupid stretch = + 4 inch

 

formula: tyre in mm divide by 25.4 = tyre in inches, then compare to rim width.

 

maybe some 8 inch (203mm) rims with 205 tyres would be okay if standard pressure kept them on the bead?

 

a lot has to do with tyre size/width/profile as to whether you can do it or not..

Edited November 20, 2010 by styler

[greenmac80]

my yeah i'm aware that the body will move.. hence i said 280mm of usable space.. i actually have 300mm total space.

yeah i'vethought about the bearing thing as well.. another reason to stick with 8"

 

as far as tyres go a 205/50 15 is pretty much the only size readily available... 205mm is only slightly smaller than an 8" wheel so i wouldn't think the stretch is that bad at all.

[styler]

big stretch

 

Edited November 20, 2010 by styler

[styler]

yeah i would almost say 205/50/15 on a 8 inch rim is the limit if it keeps on there with the normal pressure or a bit higher,

it would be good for looks no doubt and easy driving, if you want more performance a 7 inch rim might be the go,

lots and lots and lots of 15x7 with dish, very popular with ae86 and its 114.3x4 as well

[oh what a nissan feeling!]

as far as tyres go a 205/50 15 is pretty much the only size readily available... 205mm is only slightly smaller than an 8" wheel so i wouldn't think the stretch is that bad at all.

 

Just looking at one i have here fitted to a 6" rim, the side wall is perfectly square, i think with a 7" it would be a slight stretch.

 

As far as grip goes, the best grip from this size tyre would come from the 6" rim, anything larger would start to remove tread contact from the road.

 

I can see why you want to run wider rims, it will be great to fill those gaurds.

it just sucks that tyres get so expensive once you step away from the norm.

[greenmac80]

have a look at little red spirits car he has 205 50 15 in a 15x8 and it looks pretty good... not that stretched at all...

[e70van]

have a look at little red spirits car he has 205 50 15 in a 15x8 and it looks pretty good... not that stretched at all...

 

Mate, you will have absolutely no problems with a 205 on a 8" rim. :)

 

I have been running 175/65s on a 7.5" for over 6mths. hard driving, 2x skidpan/motorkhana days and its perfectly fine even at 32psi..

 

175 on 7.5" is nothing compared to what proper motorsport/drifters are running.

 

Styler - You should add: a big reason (probably the main reason) why people run stretched tyres is for guard clearance so you can run wider rims (for track increase/stability).so not just the looks and less grip for drift.

 

a slight stretch is an advantage for grip. larger tyres on not so wide rims cause the sidewalls to flex/roll.

[pozman]

one thing you should consider too, is that stretching tyres does nothing good for grip

 

Edit: also if you are looking to stretch Tyres. Different tyre stretch differently. A tyre of of the same size but different pattern or brand may streatxh more or less than others.

 

A good site to have a look at is

 

www.tyrestretch.com

 

It's an image gallery listed by rime width then Tyres size

 

Also tells what tyre is stretched. It's a pisser of a site

 

Paul

Edited November 21, 2010 by pozman