Have seen and have asked questions regarding spacers, but few people are willing to answer questiones with this topic, why??

 

What do you want to know?

 

probably because there are more than one school of thought on spacers...some (probably racers) will tell you never use spacers..others will say they are ok if they are hubcentric (self-centering)..but even those will caution you that longer lug bolts are needed and they should be stronger to take the forces that are placed on the bolts by the wheel being farther from the hub...some will say no problem even without hub centric and stronger bolts...being a racer I would say they are to be avoided if at all possible...beyond that I would select option 2...stronger lug bolts and hubcentric...good luck

 

I occassionally track my car, have turbo wheels from when the car was purchased, but wanted a more aggressive look( bring the wheels farther out), what size spacer could be used without hindering track performance, ie. the many time stated "steering dynamics".
just look at my post on the following thread.
The H&R Wheel Spacer thread - 996/997 Widebody

 

I didn't answer in the three days between your two posts because I was on vacation in Florida with my family last week.

Chuck's answer sums it up pretty well. While handling could be sacrificed when adding spacers to some cars, I can tell you that I have never heard anyone say that adding a 7mm front and 15mm rear to the car has ever done anything to the drive train on a 911 specifically. The only thing you may encounter is rear tire rubbing at the shoulder if your car is lowered and you are pushing pretty hard into corners. Acceleration squat is usually OK. Both can be fixed by rolling the fenders. I do agree that to be the most proper, spacers should be hubcentric and have correctly sized bolts. We only sell H&R, which is the best and fits the bill.

Some have complained that adding spacers adds undue stress to ball joints and bushings as well by changing how the car's parts distribute its weight. While it is an issue, it's usually only seen when the car either isn't engineered well, or adapters are used that push the wheels out a bunch. Again, I have never seen a problem with any of this using 7 and/or 15mm spacers.

Hopefully this helps, sorry for the late reply.

 

i won't go beyond 10mm spacers but that's just me. figure if i have to go beyond that, i'd rather find propers rim that fit. spacers are a necessity to some setups. i use 3mm spacer up front on the m5 'cos i wanted wider tires up front to dial out some understeer. the spacer is pretty much just so the tire does not rub my suspension. the 7gt3 comes stock with 5mm spacer at the rear and i've tracked it several times with no issues. most just use spacers for aesthetics as it sure looks nice when the tire lines up with the fender lip. make sure you get the proper length bolts to mate with spacers.

 

Thanks for the responses, mind made up, 7mm in front and 15mm in rears.