[andrew 330i]

i'm adding the F10 5 series 19" staggered (8.5 & 9") 351m wheels to my F31 wagon... (retain the same overall look but with an upsize)

~ what tire size will be need to retain the same overall diameter of the factory 18" x 8" 400m (225/45/18) wheels currently on my car?

235/40/19 (8.5") front & 265/35/19 (9") rear?

note: i'm not looking for a fluffy tire nor a banana peal (thoughts)?

i also understand i may need a 10 mm spacer for the rear 351m wheels (offset) to make things flush.

i'm also installing kw1 coil overs (a bit more wheel well height) than as the current h&r sports shown in the pics below.

thanks again for any insight.

[.BMW.]

I copy my answer from another thread:

Originally Posted by ss0803

OEM 19" staggered tires will fit:
F: 8.5x19" ET33, 225/40-19 (same diameter)
R: 9x19" ET44, 255/35-19 (same diameter)

Second closest to stock size and with wider tires:
F: 8.5x19" ET33, 245/35-19 (1% shorter than stock)
R: 9x19" ET44, 275/30-19 (1.5% shorter than stock)

Don't think you will need rear spacers, at least not if you choose the wider 245/275 tire combo.

Test fit the new wheels and tires first and then make decision regarding spacers.

[andrew 330i]

~ thanks for your quick reply!

another question:

~ which tire sizes that you posted will provide the shorter side wall?

guessing these:
F: 8.5x19 ET33, 225/40-19 (same diameter)
R: 9x19" ET44, 255/35-19 (same diameter)

i also don't want the tires to look stretched on an over sized rim, any additional thoughts?

[.BMW.]

Since you don't want stretched tires, you shouldn't choose 225/255. A 225 front tire will look stretched on 8.5" wide wheels.

I would then recommend your own suggestion in the first post, slightly wider tires with slightly higher side walls:
F: 8.5x19" ET33, 235/40-19 (1% taller than stock)
R: 9x19" ET 44, 265/35-19 (1% taller than stock)

One more alternative, but not if your car is xDrive (since the front and rear rolling circumference isn't matched):
F: 8.5x19" ET33, 245/35-19 (1% shorter than stock)
R: 9x19" ET 44, 255/35-19 (stock diameter)

The advantage with this combination is that the width difference for the tires and the wheels is both 1/2", i.e. the tires will fit very similiar on the front and rear wheels.

Approximate side wall heights:
245/35 275/30 - 85mm
225/40 255/35 - 90mm
235/40 265/35 - 94mm

Easy to calculate, follow this exampel for 225/40-19. 225 is tire width in mm and 40 is side wall height in percentage of the width. The side wall height is calculated as 225 x 0.4 = 90mm.

[andrew 330i]

~ my car is an xDrive.

so this is the consensus to accomplish the look i'm trying to achieve while keeping the overall circumference nearly the same?

F: 8.5x19" ET33, 235/40-19 (1% taller than stock)
R: 9x19" ET 44, 265/35-19 (1% taller than stock)

your input is greatly appreciated!

[.BMW.]

Originally Posted by andrew 330i

so this is the consensus to accomplish the look i'm trying to achieve while keeping the overall circumference nearly the same?

F: 8.5x19" ET33, 235/40-19
R: 9x19" ET 44, 265/35-19

I agree!

[RalphyBMW]

Given that its xDrive, you should be very careful mixing tyre sizes. The OE sizes for the F31 with the 19" wheel option are the 225/40R19 and 255/35R19, as you have mentioned above. I would stick with these to be honest.

My Dad's F10 with 245 front tyres used to tramline terribly, given that the F31 is a lighter car, I wouldn't be wanting to increase the width of the front tyres without good reason.

225 tyre should be absolutely fine on an 8.5J rim.

[therealm3]

Originally Posted by ss0803

I copy my answer from another thread:


Don't think you will need rear spacers, at least not if you choose the wider 245/275 tire combo.

Test fit the new wheels and tires first and then make decision regarding spacers.

out of curiosity, which wheels are you seeing in these sizes and offsets?

F: 8.5x19" ET33, 235/40-19 (1% taller than stock)
R: 9x19" ET 44, 265/35-19 (1% taller than stock)

[.BMW.]

Originally Posted by therealm3

out of curiosity, which wheels are you seeing in these sizes and offsets?

F: 8.5x19" ET33
R: 9x19" ET 44

OEM staggered 19" wheels for BMW 5 Series (F10).

For exampel style 331, 332, 349, 351, 366 and 367.

[therealm3]

Originally Posted by ss0803

OEM staggered 19" wheels for BMW 5 Series (F10).

For exampel style 331, 332, 349, 351, 366 and 367.

thank you!

[andrew 330i]

so this is the consensus to accomplish the look i'm trying to achieve while keeping the overall circumference nearly the same?

F: 8.5x19" ET33, 235/40-19 (1% taller than stock)
R: 9x19" ET 44, 265/35-19 (1% taller than stock)

your input is greatly appreciated!

~ very limited selection in a name brand 'all-season' tire in the above sizes. looking for something with some longevity.