Need help with fitment on f80

[Colorado_LSB]

Hello everyone I had some BBS LM laying around and decided to throw them on my F80. Wasn’t a big fan of the fitment anyone know what tires I need to run to fix my fitment thank you

Lowered on H@R springs

Specs -

19x8.5J ET32
tire 235/35/19
19x10J ET25
tire 255/25/19

[xwilkinx]

Those rims/tires are too small for the F8x in my opinion:

235 or 245 is ideal for 8.5” rim
265 or 275 is ideal for 10” rim

I would never run less than 265 front / 285 rear personally!

[N1rve]

You must love wheel spin! Lol. 255 for the rear of this car? Stock size of 275 is already not enough!

[NealfromNZ]

If you use a PS4s on the front at OEM 255/35r19 the rim range can be from 8.5 -10 inch for these tires.

So you could go with non comp sizes of 255 /275.

[M3SQRD]

Your wheel widths and offsets are not ideal for the f8x. Front is wrong offset and too small of a tire. Rear has an aggressive offset but correct min width.

Your front wheel should have been at a minimum 9” wide with an offset of 19 - 9et16. So your 8.5, to match the aggressive 10et25 on the rear, should be around an 11 - 8.5et11 which would be 20 mm spacer to convert your 8.5et32 to an 8.5et12. Don’t worry about large spacers. The BMW f82 GT4 and f87 M2 CSR factory-built racecars use 30 and 41 mm spacers, respectively. Ideally a 255 is the least wide tire on the front but it’s too wide for an 8.5” wheel. 245/40-19 diameter is too large by ~9 mm and the 245/35 is too small by ~5 mm. I’d probably recommend the 245/40-19 to better match the 275/35-19 rear tire. You could try squeezing a 255 mm tire, which is the smallest width you should run on a f8x, on the front but it will overhang the front 8.5” wide wheel. You’d use 255/35-19

10et25 is ideal for a 275/35-19 (stock wheel with and tire size by 15 mm more aggressive offset than stock). Ideally, you’d want at least a 285 on the rear but I’m not sure whether it will fit an et25 with a 285 tire.

So I’d recommend 245/40-18 tire with a 20 mm spacer for an effective 8.5et12.
As for the front, I’d recommend a 275/35 tire on the 10et25.
You could try 255 and 285 but no guarantee it’ll fit properly.

[Colorado_LSB]

Originally Posted by M3SQRD

Your wheel widths and offsets are not ideal for the f8x. Front is wrong offset and too small of a tire. Rear has an aggressive offset but correct min width.

Your front wheel should have been at a minimum 9” wide with an offset of 19 - 9et16. So your 8.5, to match the aggressive 10et25 on the rear, should be around an 11 - 8.5et11 which would be 20 mm spacer to convert your 8.5et32 to an 8.5et12. Don’t worry about large spacers. The BMW f82 GT4 and f87 M2 CSR factory-built racecars use 30 and 41 mm spacers, respectively. Ideally a 255 is the least wide tire on the front but it’s too wide for an 8.5” wheel. 245/40-19 diameter is too large by ~9 mm and the 245/35 is too small by ~5 mm. I’d probably recommend the 245/40-19 to better match the 275/35-19 rear tire. You could try squeezing a 255 mm tire, which is the smallest width you should run on a f8x, on the front but it will overhang the front 8.5” wide wheel. You’d use 255/35-19

10et25 is ideal for a 275/35-19 (stock wheel with and tire size by 15 mm more aggressive offset than stock). Ideally, you’d want at least a 285 on the rear but I’m not sure whether it will fit an et25 with a 285 tire.

So I’d recommend 245/40-18 tire with a 20 mm spacer for an effective 8.5et12.
As for the front, I’d recommend a 275/35 tire on the 10et25.
You could try 255 and 285 but no guarantee it’ll fit properly.

Thank you they came off my e46 and been in storage forever lol thank you

[M3SQRD]

Originally Posted by Colorado_LSB

Thank you they came off my e46 and been in storage forever lol thank you

I also still have a set of HRE three-piece F/R 8.5”/9.5” wheels and I installed e9x M3 tire sizes 245/265 and use a 18 mm front spacer for the front and a 10 mm spacer to clear the PFC z31 caliper.

[Colorado_LSB]

Originally Posted by M3SQRD

I also still have a set of F/R 8.5”/9.5” and I installed e9x M3 tire sizes 245/265 and use a 18 mm front spacer for the front and a 10 mm spacer to clear the PFC z31 caliper.

Heck yeah thanks for the help really appreciate it

[Nas]

I need a little help myself buying wheels second hand. Here are wheel specs curious to know if they will fit. Thanks!

Front: 20'x9" offset 30 (2.5 Lip)
Rear: 20"x 10.5" offset 45 (3.5 Lip)