Wheel spacers - how many turns is not enough?
08-17-2021, 02:20 AM
#1
Rennlist Member
Thread Starter
Wheel spacers - how many turns is not enough?
I've (temporarily?) fitted 7mm spacers on the rear of my 951 and count ~6.5 turns of the lug nut. Itsthat enough? I recall 7 turns be the recommend min that that could be a random number in my head.
08-17-2021, 12:50 PM
#2
Burning Brakes
Join Date: Sep 2017
Location: Formerly the DPRK, now seeking political asylum in Oregon
Posts: 1,155
Received 583 Likes
on
350 Posts
Golden Gate Region PCA tech sheet for Auto X/Time/Trial/HPDE says "9 Turns min".
Will your wheels come off with 6? Maybe not, but I don't think I'd track the car to find out...
Will your wheels come off with 6? Maybe not, but I don't think I'd track the car to find out...
08-17-2021, 04:20 PM
#3
Burning Brakes
M14x1.5
Since it is desirable to have at least 1 diameter of thread engagement the value of 9 turns makes sense.
You want the nut to have 14mm of thread engagement.
Since the pitch is 1.5 every turn = 1.5mm of thread engagement. So at 9 turns you have 9x1.5 = 13.5 thread engagement.
Mike G.
Since it is desirable to have at least 1 diameter of thread engagement the value of 9 turns makes sense.
You want the nut to have 14mm of thread engagement.
Since the pitch is 1.5 every turn = 1.5mm of thread engagement. So at 9 turns you have 9x1.5 = 13.5 thread engagement.
Mike G.
