What size tires do I need for 18" wheels?

[Venom]

Purchasing these 18" wheels from Martian Wheels. They recommend I use 235/55/R18 tires, but I saw conflicting information on the forum saying that 255/50R18 is the correct tire size. I would hope the manufacturer of the wheels is correct.

 

[ChewTypeR]

For the two sizes you listed it really comes down to the wide of the rim. So if Martian recommended 235, what is the width of the wheel you are getting?
255 is the stock width generally 9-10inch width

 

[Venom]

For the two sizes you listed it really comes down to the wide of the rim. So if Martian recommended 235, what is the width of the wheel you are getting?
255 is the stock width generally 9-10inch width

The wheel size is 18 x 8.5” +35

How do you convert that to the correct tire size?

 

[wackojacko]

The wheel size is 18 x 8.5” +35

How do you convert that to the correct tire size?

those rims are 1" narrower than the OE 19", They are same size I'm looking to get next winter. I think the 235 makes more sense, the 235 mean the tire is 235 millimeters wide at the tread (I'm from Canada, yeah Metric System) and the OE is 255. So that's 20 Millimeter narrower, or about 12.6/16 of an inch for my US Friends. so a narrower tire is better on the 8.5" rims.

 

[Venom]

those rims are 1" narrower than the OE 19", They are same size I'm looking to get next winter. I think the 235 makes more sense, the 235 mean the tire is 235 millimeters wide at the tread (I'm from Canada, yeah Metric System) and the OE is 255. So that's 20 Millimeter narrower, or about 12.6/16 of an inch for my US Friends. so a narrower tire is better on the 8.5" rims.

Oh awesome. So if it’s narrower it’ll likely perform better in the snow? Also it’ll get better range because of less rolling resistance, etc?

 

[wackojacko]

Oh awesome. So if it’s narrower it’ll likely perform better in the snow? Also it’ll get better range because of less rolling resistance, etc?

Bingo, and cheaper

Just make sure they are XL rated tires, Y is heavy.

 

[Venom]

Bingo, and cheaper

Just make sure they are XL rated tires, Y is heavy.

Sweet, I’m very excited to switch out the stock 21” Performance wheels. My range is about 270-280 during 40-50f temps and my charge runs out a lot quicker than I had anticipated.

 

[ChewTypeR]

I just want to top up with is 18s will look really small.. and handling might feel a little "floaty". I have the performance as well but went with 19s 255/45/19 for winter and 20s 255/40/20 for summer. The 21s are in permanent storage haha

 

[jacie6056]

OP, did you get your 18 inches Martian wheel? Very curious about how it looks like!

Sweet, I’m very excited to switch out the stock 21” Performance wheels. My range is about 270-280 during 40-50f temps and my charge runs out a lot quicker than I had anticipated.

 

[Venom]

OP, did you get your 18 inches Martian wheel? Very curious about how it looks like!

Looks great and drives WAY smoother now. Also feels a little quicker too!

 

[Ericft]

Looks great and drives WAY smoother now. Also feels a little quicker too!

Can you post some pics? What tires and tires size did you go with? Is that your all year tire? I just got my MY and interested in the Martian wheels as well. Debating whether to get 19 and use the oem stock tires and get winter tires on the geminis. Or just get all weathers like Michelin cross climates on the martians for all year use. How did you decide on the 18 vs 19?

 

[Ericft]

Can you post some pics? What tires and tires size did you go with? Is that your all year tire? I just got my MY and interested in the Martian wheels as well. Debating whether to get 19 and use the oem stock tires and get winter tires on the geminis. Or just get all weathers like Michelin cross climates on the martians for all year use. How did you decide on the 18 vs 19?

@Venom do you mind posting pics if you get a chance. Would love to see how they look.

 

[TomServo]

I’m very interested in getting lighter and narrower tire/wheels for my Y, but am waiting for some one to conduct a road test. I know Kyle from Out of Spec Motoring tested them on his M3 and the results were incredible. But he also installed some el cheapo tires.

 

[MatildaModelY]

Purchasing these 18" wheels from Martian Wheels. They recommend I use 235/55/R18 tires, but I saw conflicting information on the forum saying that 255/50R18 is the correct tire size. I would hope the manufacturer of the wheels is correct.

Did you ever get 18" tires on those? What size did you go with? Curious to see some pics.

 

[DHendrycks]

Oh awesome. So if it’s narrower it’ll likely perform better in the snow? Also it’ll get better range because of less rolling resistance, etc?

Venome..can you post some pics of the 18" tires on your Y? I'm ordering 18" for winter also . Makes total sense

 

[Venom]

Venome..can you post some pics of the 18" tires on your Y? I'm ordering 18" for winter also . Makes total sense

 

[tinman1356]

I use 145/55/18

 

[genux]

Looks great and drives WAY smoother now. Also feels a little quicker too!

Can you comment on whether the 18” have a “floaty” feel to handling compared to the original setup?

I’m debating on whether to get 18” wheels first or perhaps coilovers to get a smoother ride.