Staggered 19" front + 20" rear THREAD

[x.shell]

I've been thinking about going this route. Has anyone else been thinking about it or have already done it?


---- UPDATE ----
So since I started this thread I should probably update with my 19/20 set up.

SPECS
F: 19x10 ET23 - 265/35/19 RE-11
R: 20x11 ET36 - 295/30/20 RE-71R

JRZ RS2 Sport with -2.2 degrees of camber all around. No rubbing!










---- END UPDATE ----

Some pics of staggered diameters (the GT3 RS is 20"front and 21"rear).

[JamesGames]

I think it'd look great, and function even better than it looks, although I'm personally not a fan of the front tire being thicker than the rear. If I ran the 19/20 setup I'd probably go for one of the 4 combos only, depending on offsets of course

1) 265/35/19 front 305/30/20 rear
2) 255/35/19 front 295/30/20 rear
3) 275/30/19 front 295/30/20 rear
4) 255/35/19 front 305/25/20 rear

[x.shell]

Originally Posted by JamesGames

I think it'd look great, and function even better than it looks, although I'm personally not a fan of the front tire being thicker than the rear. If I ran the 19/20 setup I'd probably go for one of the 4 combos only, depending on offsets of course

1) 265/35/19 front 305/30/20 rear
2) 255/35/19 front 295/30/20 rear
3) 275/30/19 front 295/30/20 rear
4) 255/35/19 front 305/25/20 rear

I agree completely with your tire size recommendations. I actually ran a 19/20 set up on my 335i F30 a few years ago. That time, I tried to get the overall diameter of the tires even. This resulted in a a very weird look. The front tire was super thick, while the rear was super thin. That set up didn't last too long.

For the F80, I plan on having the rear wheel/tire diameter 1" larger.

That being said, I will most likely be using option (2) since those are the sizes available for the RE71R. I'm hoping that the R888R will come out with more sizes soon; although I'm not counting on them to come in these specific sizes.

OR

I might just ditch this whole crazy idea and stick with 19" all around.

[x.shell]

Welp, today is the day I have to decide on these wheel sizes. Here are the options I've come down to.

OPTION 1 19/20
F: 19x10 ET22 - 255/35/19
R: 20x11 ET35 - 295/30/20

OPTION 2 19/19
F: 19x9.5 ET17 - 255/35/19
R: 19x10.5 ET29 - 305/30/19

[JamesGames]

Originally Posted by exo-shell

Welp, today is the day I have to decide on these wheel sizes. Here are the options I've come down to.

OPTION 1 19/20
F: 19x10 ET22 - 255/35/19
R: 20x11 ET35 - 295/30/20

OPTION 2 19/19
F: 19x9.5 ET17 - 255/35/19
R: 19x10.5 ET29 - 305/30/19

255 on 10'' is stretched though, where the 295 won't be stretched on 11. What about 19x10 275/30/19 with 20x11 + 295/30/20? The sidewalls will look identical in stretch.

For the 19 all around setup with 305/30 and a ET 29 might rub unless you can dial in more camber, then I'd probably run 265/35/19 and 305/30/19 in that setup if possible or 255/35/19 and 295/35/19. Keep in mind the 305 tire will be bulgy on a 10.5 inch rim, and with that offset I'm actually certain it'll rub on normal camber specs.

[x.shell]

Originally Posted by JamesGames

255 on 10'' is stretched though, where the 295 won't be stretched on 11. What about 19x10 275/30/19 with 20x11 + 295/30/20? The sidewalls will look identical in stretch.

For the 19 all around setup with 305/30 and a ET 29 might rub unless you can dial in more camber, then I'd probably run 265/35/19 and 305/30/19 in that setup if possible or 255/35/19 and 295/35/19. Keep in mind the 305 tire will be bulgy on a 10.5 inch rim, and with that offset I'm actually certain it'll rub on normal camber specs.

It's true that the 255/35/19 will look stretched on a 10 inch wheel if you use the OEM tire. The RE71R and RE11 are pretty bulky though. There might be a slight stretch, but not as much as with the OEM PSS. The reasoning behind this combination was to try to keep the sidewall heights similar. But it might just be more prudent to go with a 19x9.5 and 20x11 or 19x9.5 and 20x10.5 instead of the 19x10 and 20x11.

I definitely don't want to go the 275/30/19 route as I don't want to fall below the 26" total diameter mark.

As far as the 305/30/19 fitting on a 10.5 ET29, it shouldn't be a problem. The F80 as a few more MM in width compared to the F82 (which is probably what you're measuring by). I'm also at -2.2 degrees of camber.

If you check out dubsesd 's F80, he's running a 20x11.5 ET37 rear with 305/25/20 with -0.6 degrees of camber. His set up pokes 5mm more than the 10.5 ET29. I also roughly measured my current 19x11 ET40 + 305/30/19 wheel/tire combo, and I definitely have room for 5 more mm of poke.

[JamesGames]

Originally Posted by exo-shell

If you check out dubsesd 's F80, he's running a 20x11.5 ET37 rear with 305/25/20 with -0.6 degrees of camber. His set up pokes 5mm more than the 10.5 ET29. I also roughly measured my current 19x11 ET40 + 305/30/19 wheel/tire combo, and I definitely have room for 5 more mm of poke.

A 305/30 tire is a lot taller and bulges lot more on a 10.5 inch rim than a 305/25 on a 11 inch rim. Just food for thought. Also, ET 29 is 11mm more poke, not 5mm if you're measuring from your ET40 11'' wheel. So if you do have room for 5.. you may not have room for 11!

[x.shell]

Originally Posted by JamesGames

A 305/30 tire is a lot taller and bulges lot more on a 10.5 inch rim than a 305/25 on a 11 inch rim. Just food for thought. Also, ET 29 is 11mm more poke, not 5mm if you're measuring from your ET40 11'' wheel. So if you do have room for 5.. you may not have room for 11!

10.5 ET29 only pokes out 5mm more than my current 11.0 ET40.

Three online offset calculators confirm this and I also confirmed it by converting the inches to metric and doing the math myself on a paper.

[JamesGames]

Originally Posted by exo-shell

10.5 ET29 only pokes out 5mm more than my current 11.0 ET40.

Three online offset calculators confirm this and I also confirmed it by converting the inches to metric and doing the math myself on a paper.

That I understand. I was going off your scientific measurement of 5mm left before rubbing fender on your current setup with 305s and 11s... while the wheel sticks out only 5mm more, the tire will bulge more. But looks like it should fit.. tight but wheres the fun in being conservative..

[jstnstr]

I'm thinking about going with 19x9 front and 20x10.5 rear wheels. What tire sizes would you guys recommend? I was thinking something like 265/35/19 front, and 295/30/20 rear or maybe 305/30/20 rear. Thoughts?

[x.shell]

Originally Posted by jstnstr

I'm thinking about going with 19x9 front and 20x10.5 rear wheels. What tire sizes would you guys recommend? I was thinking something like 265/35/19 front, and 295/30/20 rear or maybe 305/30/20 rear. Thoughts?

My thoughts? I say no to the 9" front. I'd do 9.5" at least. Most all suspensions will clear a 9.5 with the correct offset and a 265/35/19 tire will sit nicely on it. For the rear, a 10.5" would be nice. But if you're thinking of 305 in the rear, I would put an 11" wheel instead of the 10.5". Just my preference.

With 265/35/19 and 305/30/20 tires, the balance would look lovely. The only reason why I didn't go 305/30/20 is due to limited choices; I wanted either the RE11, RE71R, R888, or R888R.

[jstnstr]

Originally Posted by exo-shell

My thoughts? I say no to the 9" front. I'd do 9.5" at least. Most all suspensions will clear a 9.5 with the correct offset and a 265/35/19 tire will sit nicely on it. For the rear, a 10.5" would be nice. But if you're thinking of 305 in the rear, I would put an 11" wheel instead of the 10.5". Just my preference.

With 265/35/19 and 305/30/20 tires, the balance would look lovely. The only reason why I didn't go 305/30/20 is due to limited choices; I wanted either the RE11, RE71R, R888, or R888R.

Gotcha. Thanks for your thoughts, only reason o was going with 9 front 10.5 rear is because that's the only sizes the wheels I like come in.

[CanAutM3]

Originally Posted by jstnstr

I'm thinking about going with 19x9 front and 20x10.5 rear wheels. What tire sizes would you guys recommend? I was thinking something like 265/35/19 front, and 295/30/20 rear or maybe 305/30/20 rear. Thoughts?

What tires are you considering (brand/model)?

[Acree]

In case any one is curious how this set up looks on an F80, these are the same 19/20 brushed clear FI-Rs from the black car in the OP.

Tires are Michelin PSS 265/35/19F 295/30/20R

[jstnstr]

Originally Posted by CanAutM3

What tires are you considering (brand/model)?

MPSS most likely. I'd go with RE-11s if I did 19 all around though.

[jstnstr]

Originally Posted by Acree

In case any one is curious how this set up looks on an F80, these are the same 19/20 brushed clear FI-Rs from the black car in the OP.

Tires are Michelin PSS 265/35/19F 295/30/20R

Holy shit I was considering the CI-Rs and those look AMAZING

[x.shell]

Originally Posted by jstnstr

Holy shit I was considering the CI-Rs and those look AMAZING

Good thing you saw this thread then. CI-R looks meh compared to FI-R and RI-D

[jstnstr]

Originally Posted by exo-shell

Good thing you saw this thread then. CI-R looks meh compared to FI-R and RI-D

Really? What I actually meant was that it confirms my interest in the CI-R. It's visually the same as the FI- but it's just cast vs forged no? I'm just not into paying that much for wheels... 2500 is one thing. 7k is ridiculous.

[x.shell]

Originally Posted by jstnstr

Really? What I actually meant was that it confirms my interest in the CI-R. It's visually the same as the FI- but it's just cast vs forged no? I'm just not into paying that much for wheels... 2500 is one thing. 7k is ridiculous.

Lol. Foot in my mouth.

[CanAutM3]

Originally Posted by jstnstr

MPSS most likely. I'd go with RE-11s if I did 19 all around though.

That's a street setup I am considering for my next M4. BBS FI-R 19x9.5 front with 20x10.5 rears shod with 265/35R19 (TPC) CTS-V spec and 295/30R20 (*) M6 spec PSS.

The PSS mentioned are specifically designed for a front fitmemt on a 9.5" wide wheel and rear fitment on a 10.5" wide wheel. The M6 rear has a meaty 11.6" wide tread.

[jstnstr]

Originally Posted by CanAutM3

That's a street setup I am considering for my next M4. BBS FI-R 19x9.5 front with 20x10.5 rears shod with 265/35R19 (TPC) CTS-V spec and 295/30R20 (*) M6 spec PSS.

The PSS mentioned are specifically designed for a front fitmemt on a 9.5" wide wheel and rear fitment on a 10.5" wide wheel. The M6 rear has a meaty 11.6" wide tread.

Sounds ideal. I just want to be able to nail it in 2nd or 3rd heat and not see the traction light flashing.

[dmk08]

So if I wanted to go 19/20 I could do a full RE71 tire setup. My question is why not go the more standard offset like 9.5 et 20 and 11 et40? Just trying for a super aggressive look? Why 10.5s?

I have to say I think the 19/20 setup looks much better on an M4 vs an M3. It gives the M3 some serious rake.