MICHELIN CUP 2's fitting BBS FIRs 20s

[JB M4]

Hi, i need some expertise...i have BBS FIR's front 20x9.5 ET22 and rear 20x10.5 ET35 I'm using michelin ps4s 265/30-20 up front and 295/30-20's on the rear...i want to get michelin CUP 2"s but they only come in

245/30 R20
285/30 R20
295/30 R20
305/30 R20

anyone know if the 305 would fit the rear and the 245 the front...thanks

[ntg44]

that's too much of a difference with the same sidewall.

Personally, I wouldn't go lower than stock sizes on a half inch wider wheel - it's going to look way too stretched in front. If I absolutely had to work with those sizes, it would need to be 245 front and 285 rear. But you're better off finding different tires that actually fit on those wheels and the car.

[JB M4]

Originally Posted by ntgarage44

that's too much of a difference with the same sidewall.

Personally, I wouldn't go lower than stock sizes on a half inch wider wheel - it's going to look way too stretched in front. If I absolutely had to work with those sizes, it would need to be 245 front and 285 rear. But you're better off finding different tires that actually fit on those wheels and the car.

Thanks for the reply...I was worried about that...I wish I went 19inch up front now

[JamesGames]

Originally Posted by JB M4

Thanks for the reply...I was worried about that...I wish I went 19inch up front now

245/35/20 Cup 2 N0 (Porsche) Section width is 9.8 and Tread width is 9.6. Overall diameter of tire is slightly taller at 26.8''.

265/30/20 OEM star spec BMW section width is 10.7 but tread with is 8.9 with a overall diameter of 26.3.

If I had to run the cup 2 that would be the tire I'd go for, since it actually runs wider than stock, of course not ideal but beggars cant be choosers. YMMV.. really wish cup 2 were made in 265/30/20!

[JB M4]

Originally Posted by JamesGames

245/35/20 Cup 2 N0 (Porsche) Section width is 9.8 and Tread width is 9.6. Overall diameter of tire is slightly taller at 26.8''.

265/30/20 OEM star spec BMW section width is 10.7 but tread with is 8.9 with a overall diameter of 26.3.

If I had to run the cup 2 that would be the tire I'd go for, since it actually runs wider than stock, of course not ideal but beggars cant be choosers. YMMV.. really wish cup 2 were made in 265/30/20!

I talked to the bbs dealer in germany he said it will only work as 245/30-20 front and 285/30-20 rear...a smaller width back to balance out the front

[depaulhifi]

265/35/20 is only a tenth of an inch taller than 305/30/20. I'm picking up a set of those and either FI-R, R101LW, or P101 in the spring.

[JB M4]

Originally Posted by depaulhifi

265/35/20 is only a tenth of an inch taller than 305/30/20. I'm picking up a set of those and either FI-R, R101LW, or P101 in the spring.

You mean you'll put them up front...what will you put on the rear ?

[depaulhifi]

Originally Posted by JB M4

You mean you'll put them up front...what will you put on the rear ?

265/35/20 up front and 305/30/20 out back.

[TTR]

Forgot about CUP2. Go to 4s, if you car not track only - 4s has better grip and traction!

If u have m4 u can go 275 front and 305 rear, if you have m3 - 275 will rub on front and 305 with proper lowering will rub also, they will rub in place where breather of fuel tank


My setup on m3 f80 lowere on KW clubsport is

265/35-19 front

295-30-20 rear

[TTR]

Wheels spec

HRE P101

FRONT: 10j ET 20 X 19
REAR: 11.5J ET49 X 20

[TTR]

Here with 305, but it was rub inside on the right wheel only, was rubbing with fuel breather, the problem in diametr of the wheel and for you maximum size with 10.5 - will be 295 on the rear!

[JB M4]

Originally Posted by TTR

Forgot about CUP2. Go to 4s, if you car not track only - 4s has better grip and traction!

If u have m4 u can go 275 front and 305 rear, if you have m3 - 275 will rub on front and 305 with proper lowering will rub also, they will rub in place where breather of fuel tank


My setup on m3 f80 lowere on KW clubsport is

265/35-19 front

295-30-20 rear

Yeah my front is 20" not 19

[JB M4]

Originally Posted by JB M4

Hi, i need some expertise...i have BBS FIR's front 20x9.5 ET22 and rear 20x10.5 ET35 I'm using michelin ps4s 265/30-20 up front and 295/30-20's on the rear...i want to get michelin CUP 2"s but they only come in

245/30 R20
285/30 R20
295/30 R20
305/30 R20

anyone know if the 305 would fit the rear and the 245 the front...thanks

Ok so I fitted cups 2's 245/30-20 front and 285/30-20 rear and now it's been a few months and all I can say it's night and day compared to the PS4s...no wheel spin amazing turn in bite and it corners like it's on rails now...I live in a very hot climate but now it's cooled down and it's been raining a lot and still no issues with standing water...so I will only have cup 2s from now on or until they make cup 3's...