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View Full Version : Wider width in the rear?


TWELEVIE
04-06-2004, 08:32 PM
I've been searching for rims to puchase but I haven't decided widths. On my stock 330Ci, she's wearing the stock double-spoke M's; 17"x7.5" in the fronts and 17"x8.5" in the rears. I was wondering -- should I keep the staggered set-up or would it be safe to keep the same widths at all four corners? Could someone explain the benefits of keeping a staggered set-up? Thinking about rotating tires, I figured I'd be able to squeeze out a few more miles out of the tires since I'd be able to rotate all four corners instead of just side to side.

Would it change the handling and dynamic of the car's handling?

Thanks in advance,

Larry

Mystikal
04-07-2004, 01:10 AM
BMW's, with 50/50 weight distribution, will always handle better with the same size all around. Your setup only promotes understeer.

I've seen people get away with mounting another set of 17x8.5's on 245/40/17's on the front without much issue. I'd stick with 235/40/17 all around though, nice balance.

tlaselva
04-07-2004, 01:29 AM
^^ Agreed.

Staggered tire sizes are installed by care companies for asthetics.
Many people like the look of the larger tire in the rear. Looks sporty........:rolleyes:

In the interest of performance, same sized tires all around are best. Helps neutralize understeer, which most BMW's are designed to do, in the interest of safety.

sonny
04-07-2004, 05:37 AM
Go with these rims, they're awesome! (18'' OEM M Sport Package)

TWELEVIE
04-07-2004, 05:11 PM
Would I be able to fit 8.5" widths all around?

golden
04-07-2004, 06:22 PM
wait, staggered setup is good for rwd cars cause youd want more grip in the back.. thats why drag cars have huge back tires

Sunapollo
04-08-2004, 02:25 AM
Originally posted by TWELEVIE
Would I be able to fit 8.5" widths all around?

definitely !! for the proper offset wheels

WASABI
04-08-2004, 02:43 AM
Originally posted by golden
wait, staggered setup is good for rwd cars cause youd want more grip in the back.. thats why drag cars have huge back tires BMWs aren't straight line cars though.

STALKER
04-08-2004, 07:02 AM
I would get staggered. I find they handle better, regardless of what some ppl say and plus you get a nice fat lip in the back.

SickFinga
04-08-2004, 09:05 AM
Originally posted by tlaselva
^^ Agreed.

Staggered tire sizes are installed by care companies for asthetics.
Many people like the look of the larger tire in the rear. Looks sporty........:rolleyes:

In the interest of performance, same sized tires all around are best. Helps neutralize understeer, which most BMW's are designed to do, in the interest of safety.


would you switch to to 265 17" all around?
i dont think so

golden
04-08-2004, 05:46 PM
dont most ferraris havbe a staggered setup? i dont think its for aesthetics

its for handling and power off the line

SickFinga
04-08-2004, 11:00 PM
Golden, I dont there is a single performance RWD car without staggered setup.

golden
04-08-2004, 11:45 PM
i thought so

all you others guys are wrong :P

Mystikal
04-09-2004, 04:15 PM
For mid-engine cars, they need the wider rear contact patch to handle the extra weight in the rear. Otherwise it would be oversteer city.

Cars with more than a certain amount of horsepower (like 375+ I'm talkin) require a wider rear tire to get the power down. The only reason the fronts result in being smaller is because such a wide front tire will produce heavy steering effort and may not even be feasible within the wheel well and fenders.

In any other car, it's just understeer-promoting, and for aesthetic purposes.

Case in point: the E36 M3. M50B30 models came with 17x8" 235/40/17 all around, and was the most neutral handling M3 ever made. BMW wanted to tame it down later, so what did they do? Retune the suspension for more understeer and install a staggered 225/245 setup. This is just plain worthless on a car with only 240hp. Really now, when are you having traction issues in your M3 or 330i? They can't even spin from a rolling start.

Mystikal
04-09-2004, 04:15 PM
For mid-engine cars, they need the wider rear contact patch to handle the extra weight in the rear. Otherwise it would be oversteer city.

Cars with more than a certain amount of horsepower (like 375+ I'm talkin) require a wider rear tire to get the power down. The only reason the fronts result in being smaller is because such a wide front tire will produce heavy steering effort and may not even be feasible within the wheel well and fenders.

In any other car, it's just understeer-promoting, and for aesthetic purposes.

Case in point: the E36 M3. M50B30 models came with 17x8" 235/40/17 all around, and was the most neutral handling M3 ever made. BMW wanted to tame it down later, so what did they do? Retune the suspension for more understeer and install a staggered 225/245 setup. This is just plain worthless on a car with only 240hp. Really now, when are you having traction issues in your M3 or 330i? They can't even spin from a rolling start.

WASABI
04-09-2004, 06:09 PM
Originally posted by SickFinga
Golden, I dont there is a single performance RWD car without staggered setup. Are we talking production cars, road course cars, or drag cars? I'm not saying there's no performance advantage in staggered setups, but it depends on the application.

thinair
04-13-2004, 05:09 PM
Unless you're making crazy power, have a rear mounted engine, never accelerate around a corner, or want to look sporty, then a non-staggered setup is best.

I run 235 all around right now, it's pretty neutral, for auto-x I want 255 all around, not staggered.

Basically what Mystical has said is right.

SickFinga
04-16-2004, 03:54 AM
Mystikal, i dunno what tires you are running, but you are spinning in 3rd gear with just 170hp

of course m3 doesnt spin tires while rolling, thats why they come with 245s.

Mystikal
04-16-2004, 04:21 AM
Originally posted by SickFinga
Mystikal, i dunno what tires you are running, but you are spinning in 3rd gear with just 170hp

of course m3 doesnt spin tires while rolling, thats why they come with 245s.

What? I chirp 3rd.

Put 2 225's on the rear for a day. I guarantee no rolling wheelspin.

SickFinga
04-16-2004, 04:30 AM
You chirp crazy in 3rd gear.

im not gonna slap 225, and to be honest I love WIIIIIIIIIIIIIIIIDE tires :D