[AllaVodka]

Front is 18x8 rear is 18x8.5
Front 225/45/18 rear is 255/40/18

Tbh, Idk what most of this means. I just copied and pasted from another forum. But curious if these would work, or I should aim for thinner wheels?

[visionaut]

Those are fine. I run 18x8s square for winter.
You might want to go smaller than 255 for the rear winter tire. You could also easily run square tires given the wheels are only 1/2” diff width..

[Ennoch]

I'd probably go square if I was going again so I could rotate, but I've been running the staggered 403M wheels for my winters the last two winters and they've been absolutely fine. Ice, deep snow etc and they've not been a problem.

[AllaVodka]

Originally Posted by visionaut

Those are fine. I run 18x8s square for winter.
You might want to go smaller than 255 for the rear winter tire. You could also easily run square tires given the wheels are only 1/2" diff width..

This may be a dumb question. But could you elaborate on what the numbers mean? Like is the wheel width 8.5? Or 255?

And what do you mean I ciuld run a square set up? If the rears are wider, wouldnt that be staggered??

I'm a noob, and this shit confuses me lol

Like what do the 8 and 8.5 signify?

The 225 and 255?

And 40 and 45?

Thanks

[visionaut]

Front is 18x8 rear is 18x8.5

>> 18” diameter wheels. 8” wide and 8.5” wide. Staggered wheels (not same width)

Front 225/45/18 rear is 255/40/18

>> 225mm & 255mm wide tires. 18” diameter (for 18” wheels)
>> 45 & 40 Aspect Ratio tire sidewalls ( percentage of tire width). A lower Aspect Ratio has less sidewall height for the same tire width.

You could run same size tires F/R (un-staggered tires) on your mildly-staggered wheels.

Learn more about wheels/tires sizing at places like: https://www.willtheyfit.com

[johnung]

Originally Posted by AllaVodka

Front is 18x8 rear is 18x8.5
Front 225/45/18 rear is 255/40/18

Tbh, Idk what most of this means. I just copied and pasted from another forum. But curious if these would work, or I should aim for thinner wheels?

You don't say whether your car is RWD or XDrive? If XDrive, then you can't just put different sized tires on the front and rear without making sure that their measured diameters are within 0.2" or you would risk breaking your $4,000 XDrive Transfer Case.

In general if you are getting winter tires to drive in the snow like up to the mountains then thinner width 225 tires are better than thicker width 255 tires. Thinner tend to cut through snow while thicker tend to hydroplane over it with less control.

A nice winter setup might be 18"x 8.0" ET34 BMW 400M wheels with 225/45-18 winter tires. That is a square setup.

The model of winter tires matters too depending on the type of winter driving that you do. If you are in the city/suburbs where snowfalls are typically under 4"-6", roads get plowed and ice is common, then I'd get Michelin X-Ice SNOW tires. They are quieter and amazing on black ice.

But if you are driving up to Hunter Mountain or Vermont a lot where you might encounter higher snowfalls and unplowed mountain roads then I'd go with Blizzak WS90 winter tires.

Hope this helps!

[AllaVodka]

Originally Posted by visionaut

Front is 18x8 rear is 18x8.5

>> 18" diameter wheels. 8" wide and 8.5" wide. Staggered wheels (not same width)

Front 225/45/18 rear is 255/40/18

>> 225mm & 255mm wide tires. 18" diameter (for 18" wheels)
>> 45 & 40 Aspect Ratio tire sidewalls ( percentage of tire width). A lower Aspect Ratio has less sidewall height for the same tire width.

You could run same size tires F/R (un-staggered tires) on your mildly-staggered wheels.

Learn more about wheels/tires sizing at places like: https://www.willtheyfit.com

Thanks man. I guess the part i'm still confused about are the differences between the 8" measurement and the 255 measurement. They both represent width? What exactly is the difference between the two?

Edit - Just found out the 8 is the rim width, and 255 is the tire width. I also am super confused how you can fit different width tires on the same rim without them losing air?!? Shouldnt they fit 100% perfect?! Anyway, looks like ive got some more shit to learn ha

[visionaut]

Tire tread width is often wider than wheel width. Go look at your own.
At the extremes, too wide a tire ‘balloons’, too narrow a tire is ‘stretched’... Play with that calculator and see.

Wheel widths (the distance between inner beads on the wheel) are cited in inches, while tire tread widths are cited in millimeters. Wheel offset, however is cited in millimeters. Just Because. ;D

Tires also have profile widths (measured at the fat bulge in the tire sidewalls), but they aren’t sized by that… Go to a tire store website and click on the specs for a given tire to see all the dimensions & load/speed ratings, etc spelled out…