Hi,
I`m in the middle of making a custom wide body for miata 1993 and trying to come up with some good wheel options to fill the wheel wells up. I`m planning widening the rear 5.5” each side, and the front 4” each side.
My body kit will be exactly same as this one here, The guy who did this body kit, using following wheels: Tires : 275/35/18 front and 335/30/18 rear.
But I cannot install this kind of rims on my Miata 1.6 axle, I choose something a little smaller but want to get maximum wide rims (deep lip)
The sizes is still flexible, The sizes which I was looking at, is similar to this:
FRONT:
size:
R17" x 10" Wide offset +11" 4×100 bolt pattern

REAR:
size:
R17" x 11.5" Wide offset +11" 4×100 bolt pattern

So I think my setup for my wide body should be right maybe wrong, but i`m not sure about offset and not sure wich tires i can install on this wheels. the problem is that we do not have anything like that, and it very hard to choose something that you seen only on photo
My goal is:
A wide body to run maximum wide rims & tires (similar to this but different body kit)

tires and wheels will be driven on weekends and mostly drag racing.

 

275/35R15 on a 15x10 +25 is the widest I am readily familiar with.
949 Racing - 15x10 6UL

You are in uncharted waters.

 

Thanks a lot for your reply,

so that mean if i buy lets say this ones
they will work as bolt-in ?

but which rims will be better for front, how you think? 9" or 8" and what tires to take for front
my question is this size and offset gonna hit the frame when turning on full lock??

also what if i install stretched tires which size i will need then? maybe 195/50/15 ? ??

and by the way just make some research: offset +25 will move wheel inside

where a negative offset (same width wheel) can achieve the aggressive look as you move outside the "fender" where my wide body should be

so i think i`m clear in my question correct me if i wrong:

I need wheels with max. negative offset (if i will need cutting to fit them - no problem) as long as size and offset not gonna hit the frame when turning on full lock
also planning to have two sets of tires:
what size of max wight tires i can install as set 1 and for set 2 i want install stretched tires which size i will need then for set 2?

 

After a brief Google Images search for 15x10 6UL I found these.

Unknown tire size. This one might be using spacers:



275 size Hoosier A6 slicks on 15x10 6UL's






15x10 versus 15x8

jZbPC.jpg?1


225/45/15 stretched on 15x10


On 275/35/15 again:



245/580R15 Hoosiers:






I would buy the same size all the way around, that way you can rotate them to make the tires last. Just use a thicker spacer in the rear, like a 1 inch (25mm) to get them flush with the fenders or if you want to make the back look wider.

 

BEST GUYS, now i know what to gooogle

i done some research as per your advice and I think I want to use 15" size rim

For rear I choosing 15x 11" (with 0 offset - less stress on bearings)

&

15x10" 0 offset for front

what are the best tires size for those specially for front? and what you think about my choice? any suggestions?

 

I'm between two tire sizes



rear
15x11 0-offset 245/40 -15

front
15x10 0-offset 205/50 -15

or

Rear
15x11 0-offset 225/50 -15

front
15x10 0-offset 205/50 -15

 

Zero offset tires stick out an inch further than the +25 15x10 6ul wheels I linked above. Beware that the zero offset or spacers will be worse on the bearings and our fatigue-susceptible rear hubs and the car will be much more difficult to steer.

Your car won't corner worth a crap on stretched tires so I'm not worried too much about the handling losses.

But you should know about putting undue stress on the rear hubs and fatigue stress. See examples:


Watch in the rearview mirror after he stops.

It isn't exactly rare.

 

So basically if i need normal handling on drift, drag and just daily driving i need forget about 0 or negative offset & stretched tires, or i need to be prepare for HUB damage.

You suggest to look on wheels with +25 offset with out stretching tires correct me if i`m wrong
if that correct then what if i choose this sizes:

Rear:
15x11 +25offset - 275/35/15

Front:
???????? 15x8 or 15x9 or 15x10

 

The rear hubs fatigue and fail from being stressed over time. Race rubber is sticky and transfers a lot of force to the hub. Having a low offset tire also tries to bend the hubs by uneven force from the inside and outside of the centerline of the tire. I'm not saying don't do it at all, but be aware of the possible pitfalls and plan to inspect them for signs of fatigue.

What wheels did you find that you like? If you want it to look a certain way, that is up to you. My only concerns are that you wouldn't be as pleased with the performance if you do it wrong. Which do you want more, performance or looks? It really is your personal priorities that matter. It is your car.

The reason everyone uses 15 inch wheels is because of the weight (which affects acceleration, braking, transfer of forces from the road into the chassis, and roadholding) , available good high performance tire sizes, and the size of the wheelwell opening.

I can actually feel a 3 lb per corner difference when I switch wheels at the track.

 

thank a lot for good answer,

performance or look is a good question

Let me explain i do not need super performance because is more like summer daily driving car with a little drift and drags on weekends i would say.

I like how negative offset look like, but i can see that it is a lot of stress going to hub, what i do not like.
so that why i`m looking something i a middle i do not want to stress hubs and do not want factory offset wheels.

I like when rear wheels are wide, so that why i was thinking that for rear 15x11 +25offset - 275/35/15 i think we have the same photo on your post with this tires size.
but can not choose for front.

You can see as per you suggestion i forget about stretched tires because of poor handling in all ways. so i do not need just look if car handling goes bad than factory.