mtlcls500

My ADV wheels will be here any minute.. And the recommended tire size is 245/30/20 and 285/25/20

Is this correct? I have heard some local people telling the height is not matching and telling me that it is not the correct size.. Yet i see most c63 on 20" with this size..

Please help!

Wheels are:
20x8.5
20x10
The offsets are ET39 and ET51


Thanks so much guys!

AMGFANs

rear with ET51? really? or front?

derspi

^

The stock rears are +54 on the C63 so +51 should fit fine.

And to the OP, use this tool here:

http://www.miata.net/garage/tirecalc.html

_AMG_

I know guys running Pirelli Nero's in those sizes on 20's.
Personally I would stick with 235's in the front and 275's in the rear, just to be in the safe side.

gthal

I think you will be rub city in the rear. As AMG says, I would stick to 275 rear. Heights of the tires should work.

Roswell

The front should be fine, but the 285 rear will rub with +51mm offset. You need at least +55mm to pull it off. So I agree with above, go 275.

mtlcls500

So what is the exaxct size i should run?

bobbyzcar

Effect of offsets are not static...it changes with wheel width...so the 10" ET51 actually sticks out 15mm more then stock...not 3mm like many on the forum think. 1" width is equal to an additional 12 in offset.
You will rub with a 285 on a 51 offset.
I think the tolerences are VERY tight with any 285 on a 10" wheel with this car because if you go a bit higher on offset (like maybe 56) you run the risk of rubbing on the inside.
All this is from what I have read on the forums. My wheels are still 4 weeks away so I have no actual personal experience, but have read every thread on here about offsets before ordering my wheels.

mtlcls500

Does a 275 fit on a x10 wheel?

I am Jeff

Yes. Go with 275/25/20. Less chance of your rears rubbing in bumps.

mtlcls500

what front size do i use

mtlcls500

Only Nitto seems to make a 275 25 20.. and I cant get these in Canada.. lol wtf am i supposed to do

crazy1eye

Front, P235/30R20
Rear, P275/25R20

Check with Steve. *** ya nevermind, your right about the 275

Well go with the 285 & don't lower it, or if it's coil overs then just a bit

jakio

Yes only Nitto make 275 but pirelli 285 do the trick also coz pirelli are made different i have nitto 275 on my 20 but use to have pirelli.You dont have many choice on tire with that set up.Good luck Montreal street are terrible that's why i want to switch to 19.

mtlcls500

Someone told me to run a 265/30 and 245/30

Wtfff

jakio

Order from the states only place you will get them.In Montreal only pirelli but very are quite expensive.2 rears for one summer , i am very conservative and i dont drive like a crazy guy so if you oder from states stock 2 sets rear in your garage.

crazy1eye

Tire equivalency table...

http://www.pneuradial.com/equivalence

Input your stock 19" size, front is 235/35/19 & you can see the +/- difference, yes, 285/25/20 out back is good, but....

mtlcls500

But?? What

crazy1eye

Unfortunately our cars aren't suited for 20's, IMO anyways. For me, with our roads, 19's are pushing it with the size tires we run.

crazy1eye

lol, sorry... But you'll have a greater chance of them rubbing if lowering & not to many to choose from so there $$$

derspi

OP isn't asking about his wheels. From what I gather, they've been ordered and are on their way - he's asking specifically about tire size. But at 10" wide, I gather it will be a very tight fit but at least with +51 he won't have problems on the inside so technically they will work. Just not an ideal fit.

mtlcls500

Yes i just want proper overall diameter fitment

crazy1eye

Then as I posted earlier,

Fr: 235/30/20
Rr: 275/25/20

The 285 in the rear would be overall .197" or 5mm taller than the 275, 1/2 of that on the radius or profile & of course would be 10mm wider overall, so it would stick out 5mm more

mtlcls500

Who makes that matching set?Nitto?

sighting

mtlcls500, not all 275 or 285's have the same tire (section) width,
In some cases they differer drastically. That is why you hear ppl saying that they can runs 285 and other will rub with a 275. the stock 255 on the back of our cars are actually very wide for a 255, its just about the same size as a normal 265. List out the tire options (specific brands) and we can take it from there. The maximum Section width I found that you can run without rubbing even of the rear seats are loaded up on the stock rims are 11.2"

Here is an example..
Michelin Pilot Super Sport 275/25ZR20 Section Width (11.6")
Pirelli P Zero Nero 275/25ZR20 Section Width (11.4")

Bridgestone Potenza RE050A Pole Position 275/30R20 Section Width (10.6")
Michelin Pilot Super Sport 275/30ZR20 Section Width (10.9")
Sumitomo HTR Z III 275/30ZR20 Section Width (10.5")
Hankook Ventus V12 evo K110 Section Width (10.9")
Pirelli P Zero 275/30ZR20 Section Width (11")
Bridgestone Potenza S001 275/30ZR20 Section Width (10.9")


I have less than half a pencil between the tire wall and the back brake line on the stock 18's running a 275, but my 275 tires has a very wide section width of (11.2")

So if you have 51mm offsets VS 54mm that means its about 0.12" more on the outside of the tire.

I would need to go look again at mine to see the space left between the outside and the fender.
But my gut tells me that the widest Section width you should go with is about 11"

** The NITTO Invo 275/25-20 Has a Section Width of 10.83" and go for around $328 each in the rear

Hope it helps you