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Discussion Starter #1
Many threads have discussed the handling advantages of putting the rear tires and wheels up front. BUT, no one has discussed the disadvantages. WHY NOT DO IT??
 

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more weight, more tramlining (not sure if that is spelled correctly), more expensive tires, probably worse aerodynamics, fuel economy and top speed.

oh, the obvious, less understeer, so if you're a bozo in the corners you have more opportunity of exiting backwards.
 

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Oh man you're gonna get nailed by the search police! :deal:
 

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Discussion Starter #4
In my defense( I am an attorney) I just re researched the subject. The only post on the subject I can find is this one.
 

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Understeering cars are safer for poor drivers. They serve as an effective speed governor/limiter in corners. A teen kid who's used to driving mom's minivan or some other plowing machine will wrap a neutral-handling car around a tree before they realize they aren't gonna hear tires howling, squealing and scrubbing.

Another issue that hasn't been mentioned is road feel and steering sensitivity. Both are compromised a bit with brute sizes.

If you are looking for better max performance on M5, the wider wheel & tire combo always is the best choice. The modest 8" front wheels are grossly overworked for the 2 ton V8 application.
 

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In my defense( I am an attorney) I just re researched the subject. The only post on the subject I can find is this one.
Try different search terms!
 

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more weight, more tramlining (not sure if that is spelled correctly), more expensive tires, probably worse aerodynamics, fuel economy and top speed.
I would add extra strain on the front wheel bearings also. All relatively minor trade offs IMHO.
Regards,
Jerry
 

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I would add extra strain on the front wheel bearings also. All relatively minor trade offs IMHO.
Regards,
Jerry

good point, also on the various bushings etc. You'll go thru thrust arm bushings faster.
 

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Discussion Starter #9
THANKS to all with a positive answer. Since I do not plan to track the beast, it seems the stock wheel and tire size and configuration are the best.
 

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THANKS to all with a positive answer. Since I do not plan to track the beast, it seems the stock wheel and tire size and configuration are the best.
Forget track. Handling has everything to do with street performance use. Switching from stagger to non-stagger setup is one of the best street modifications you can make to the M5. The increase in cornering capability is substantial and the front tires will last longer.

For street only, the performance advantages offered by the 9.5" front wheel setup far outweigh the disadvantages.
 

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Forget track. Handling has everything to do with street performance use. Switching from stagger to non-stagger setup is one of the best street modifications you can make to the M5. The increase in cornering capability is substantial and the front tires will last longer.

For street only, the performance advantages offered by the 9.5" front wheel setup far outweigh the disadvantages.
Can you please convince my wife of this? For some reason the extra $1k for new wheels is putting a damper on things :)

d-
 

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Tire rotatation is a plus. Tell her you will get 50% more life out of the $1200 you spent on tires. Payback in a couple years.

Bad thing about having a square setup? Well, you look cooler, the car performs better, you can rotate the tires, you only have to remember one set of numbers, your winter tires (using the smaller wheels) are better, cheaper, faster.

So here's the catch - and you volunteered this Jack:

You are an attorney so the facts don't matter, onlly the presentation of them :)

-Kirk
 

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so if you're a bozo in the corners you have more opportunity of exiting backwards.
Saw this elsewhere:

"He ran out of talent about halfway through the corner"-Buddy Baker

Thought you'd like it...

A
 

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In my defense( I am an attorney) I just re researched the subject. The only post on the subject I can find is this one.
No, not possible. Perhaps you chose the term "disadvantages" and not the broader ...rear wheels up front

No worries, you've got most of the pros and cons.

Try to find an M5 to drive with rears up front! Someone in Hotlanta must have that...

A
 

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What I find interesting is that with all the M5s in the Silicon Valley area, so few of them run the rear wheels up front setup. I maybe have seen one, not counting our M5 board meets.

A couple more downsides. The clearances are tight enough that severe deflection in very high g turns can give slight rub on the extra large diameter tubes found on FSD shocks. Also, the turn-in isn't quite as crisp with the wider tires. The increased grip, however, is phenomenal.

I'm running my 4x275 setup again out of necessity because my OEM fronts are temporarily sidelined by defective belts. I'm not noticing as much rubbing as before, however (not sure why; maybe recent wheel alignment has something to do with it - anyway it's only very slight, on very big dips in the road and then only very slight rub on one side, inner fender liner, just enough to make a sound but not scratch or tear anything), and I'm enjoying the increased grip, so I think I'll just stick with this for awhile, until the present set of tires wears out. I may try 4x265s next time for clearance, and because fewer and fewer companies offer 275/35s in 18" sizes (can't find Goodyear GS-D3s or F1 Asymmetrics in 275, for example, but PS2 still come in 275).
 

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Can you please convince my wife of this? For some reason the extra $1k for new wheels is putting a damper on things :)

d-
I'm with kmac, the person. The ability to rotate tires will offer better tire wear and life. This will cover the cost of wheels in a couple years. If you need a winter setup, the 8's are needed anyway. If not, they may be sold to recoup a portion of the investment.

The way I drive on the street, I get double life out of the tires from investing in camber plates and square setup. With a full set of tires approching $1K, this covers the investment after chewing up two sets. Or, try this...:thumbsup::cheers::15:lovelove Don't argue with the wife. Educate her so she makes the right decision herself.

On the track, the benefits are more pronounced.
 

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Can you please convince my wife of this? For some reason the extra $1k for new wheels is putting a damper on things
Actually, the hardest part of convincing my wife of this was allowing me to store the other wheels/tires in the garage, thus taking up precious space! :eek:oohhh:
 

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to those with rears on the front: how noticeable is the tramlining? On my old '02 Firehawk, which had 275-17s on all corners, tramlining in city driving (crappy NY roads) was noticeable and annoying. I haven't experienced any tramilining with the M5, nor my previous e46 M3, with the stock setup.
 
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