FC: Wheel Fitment Thread

[TitaniumTT]

Indeed, infact, we might start handing out warnings/bans for vulgar displays of stupidity

[josh18_2k]

Originally Posted by Rotary Related

Adding a spacer does not change the offset of the wheel it just moves it out further from the hub face. The wheel remains the same. If you used a wheel that was the same offset as the "effective offset" as he mentions it would be constructed completely different.

thats only really true for multi piece wheels that use the same face with a different barrel. 18x9.5 +38 and +15 rpf1's, for example, look identical from the outside. obviuously some wheels are shaped differently, but some arent.
in fact if brake clearance is an issue, its easier to fit wheels WITH a spacer. run a higher offset wheel with spokes designed for opem brakes, then space it out to clear big brakes. low offest deepdish whateverthehells are much harder to fit over BBK's.

Your going to get some kid with a huge spacer and a wheel held on by a couple threads of wheel stud. Then his studs will break possibly causing a crash and destroying his vehicle if he's lucky and possibly injuring himself or others in the proccess if he's unlucky.

thats a different argument. "how many threads should i have engaged?"
well its really not much of an argument. a fastener needs 1/2 of its diameter engaged to be equal in radial and axial sheer strength. for a 12x1.5 threaded stud, that equals 4 turns. stick with 5 to play it safe.

need more thread engagement? these are a hell of a lot cheaper then custom built wheels:
http://www.jegs.com/i/ARP/070/100-77...oductId=747558

Also using his method causes accelerated wear on the wheel bearings since the load is now being carried out further from the bearing.

the location of the center of the tire (scrub) is all that really matters in bearing load, as well as the load itself of course. whether it be a +10 wheel, or a +40 wheel with 30mm spacer, the bearing doesnt know the difference.

You need as much of the mass and inertia centered over the bearing as possible to reduce this. This is just common sense you don't need a doctorate in physics to understand this.

you think wheel weight has any affect on your bearings? they're designed to support cornering forces of an entire car... maybe your wheels weigh 1000lbs? i guess thats possible with multipiece steel wheels lol

Some sactioning body for racing DO NOT allow spacers for these reasons.

just about every time attack car runs slipon spacers, fyi (since most of them run 1-piece wheels with OTS offsets)