ARP extended wheels studs installed !

[JKL1031]

Was doing some research and came across this. Beware that (at least back in the day on my G35)8mm of the 1" extended studs is used for the ball end on ARP studs. You may actually be loosing 8mm of thread engagement with 1" spacers. I dont know if they have updated the way they claim the extended length, I would measure to verify

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[Shepard]

That's good to bring up, I was curious myself about the effective thread area on the ARP hardware. I have 1320 Performance studs (same part #?) and 25mm slip ons from CJP that I'll be installing later so if I remember, I'll post pics and measurements to satisfy anyone's curiosity. It makes me wonder why the threads stop so short. I feel like 8mm is quite a bit but the threadless tip is there as a "speed nub" to make lug nut attachment quicker.

Pic of original ARP extended wheel stud 100-7733 for reference (summit website)

ARP Extended Wheel Studs (clone? same part number, different stamp?) from 1320 Performance (no longer sold on their site) 7733 WS-043. Found on Ebay.

If these are what they say they are, the end of the thread should reach out to about 81-82mm, which is ~25mm/1in longer than the OEM studs. Reportedly, 5mm spacers or smaller can fit with enough engagement on the stock studs but I haven't verified this for myself so I'd take it with a grain of salt. If it were true, we would be ok with up to ~29mm spacers, which is an extrapolation and probably questionable but it might give someone peace of mind if they're trying to fit a 1" spacer on ARP extended studs. This is accounting for the 8mm that we lost off the ball end of the ARP studs.

OEM Ford Mustang 2015+ (non-Shelby) wheel stud BCPZ-1107-A for visual reference

These are not to scale but they appear visually correct from what I see with my bolts.

* If you did not read carefully, please do not try to install a 29mm spacer with ARP hardware.

** Look into ARP "Speed Nuts" which are made to work with the speed nub