Width of Wheel Spacers
10-03-2010, 10:32 PM
#1
Width of Wheel Spacers
What is the maximum width spacer one may use with the stock lug studs? I.e. how many threads do the lug nuts require to safely hold on the rear wheels?
10-03-2010, 11:09 PM
#3
Team Owner
OK ROD we need more info,
not really sure why your making 2 posts with the same question.
SO what is the wheel that you want to mount on the car and how deep is the grip length in the wheel stud area also we need to know the ET or offset and the rim width and if possible the tire selected.
Without this additional info your answer will be a crap shoot
not really sure why your making 2 posts with the same question.
SO what is the wheel that you want to mount on the car and how deep is the grip length in the wheel stud area also we need to know the ET or offset and the rim width and if possible the tire selected.
Without this additional info your answer will be a crap shoot
10-03-2010, 11:17 PM
#4
Team Owner
FWIW the OP asked a vague question to begin with, but the answer is 4mm
10-04-2010, 12:01 AM
#6
Team Owner
Rod you can answer this question yourself ,
put the wheel on the rear of the car with the selected tire,
roll the car to settle the suspension,
then measure from the outer edge of the tire to the inside edge of the fender lip.
do this for both sides use the side that has the least clearance,
then subtract 5mm from your measurement this would be the distance of the spacer that you can use. EG 34mm - 5mm = 29 mm
IIRC you should be able to use a 24mm bolt on bolt on spacer,
you shouldnt use a spacer more than 4mm thick if its a slide on and your using the aluminum lug nuts
put the wheel on the rear of the car with the selected tire,
roll the car to settle the suspension,
then measure from the outer edge of the tire to the inside edge of the fender lip.
do this for both sides use the side that has the least clearance,
then subtract 5mm from your measurement this would be the distance of the spacer that you can use. EG 34mm - 5mm = 29 mm
IIRC you should be able to use a 24mm bolt on bolt on spacer,
you shouldnt use a spacer more than 4mm thick if its a slide on and your using the aluminum lug nuts
10-04-2010, 02:26 AM
#7
Rennlist Member
Just to play along with everyone else...
To actually answer the OP's question...
I remember this coming up WAY back in the Porsche List days. IIRC, the answer at the time for stock lug nuts on stock wheel studs was at least 7 full turns of the lug nut to engage enough threads of the wheel stud to achieve a safe amount of torque.
From experience, stock lug nuts on stock wheel studs using 17" Cup II wheels had 14 full turns. After adding a 6mm slide on spacer, I had 9 full turns on the stock lug nuts which was adequate for the correct torque.
I remember this coming up WAY back in the Porsche List days. IIRC, the answer at the time for stock lug nuts on stock wheel studs was at least 7 full turns of the lug nut to engage enough threads of the wheel stud to achieve a safe amount of torque.
From experience, stock lug nuts on stock wheel studs using 17" Cup II wheels had 14 full turns. After adding a 6mm slide on spacer, I had 9 full turns on the stock lug nuts which was adequate for the correct torque.
Trending Topics
10-04-2010, 02:44 AM
#8
Nordschleife Master
Rick has the correct answer...7 threads (or turns of the nut) is safe... You can almost NEVER use a spacer on a 928 w/o changing the studs...there are a few (but VERY FEW) exceptions to that. That is why almost all of us who use spacers on our cars use the MUCH MORE EXPENSIVE bolt on type! Those are the ones that have their own studs, you use open end bolts to hold the spacer on the hub and then you use the regular lug nuts to hold the wheel to the spacer...VERY important that both are hub centric too!
