Club 80-90 Forums

hey all, just test fitting my wheels and seeing what people think whether this is safe or not?
i have 17 inch steel rims but left the original studs in as I was under the impression longer studs were only needed for alloys, guessing I could be wrong here!
anyway, my old standard steelies took 10 full turns of the nut to be done up tight but my new ones will only take 8 full turns. Will that be a safety issue? obviously it will be torqued up correctly.
i have longer studs that will be fitted eventually, but until i get round to that will these be safe to use like this?

heres how they would look when on (these are on the rear with the standard studs in)





just how they look when on

Think the broad rule of thumb is that the length of thread engaged should be at least equal to the diameter of the fixing.

That was my understanding as well. The wheel stud thread size is M14 x 1.5mm, so you should aim for 10 turns of engagement.

Mine were like this when I fitted my alloys. Was advised it was unsafe, and to fit longer studs.

Bit of a ball ache if you ever go back though as it may look weird so will need going back to shorter studs, but hey ho.

guess my saturday is taken up now with  installing the longer studs! best be safe i guess!
now who the hell has a 500nm torque wrench! i sure dont lol
cheers for the info guys.

got my longer studs fitted but guess i bought waaaay too long studs, as they protrude now by about 4cm past the nut lol
is it safe to just cut them down to the length I need?

was thinking putting the wheel on, marking the thread where to cut, removing the wheel and adding 2 nuts on so it leaves a small gap inbetween , just enough for a hacksaw, and chopping them off while they are still fitted.
is that gonna be doable?

Are the nuts fully tightened? It looks like you could get another turn ? One or 2 threads below the face is fine

davidoft1 wrote: ↑18 Nov 2021, 09:29 Are the nuts fully tightened? It looks like you could get another turn ? One or 2 threads below the face is fine

thats the old studs in the pic, new ones fitted and are way too long now and look stupid

Shinnster wrote: ↑18 Nov 2021, 12:57

davidoft1 wrote: ↑18 Nov 2021, 09:29 Are the nuts fully tightened? It looks like you could get another turn ? One or 2 threads below the face is fine

thats the old studs in the pic, new ones fitted and are way too long now and look stupid

An ISO regular nut thickness is 0.8x the thread diameter, so 11.2mm or 7.5 turns.

Wheel nuts have more thread on them than an ISO regular nut, but this is mainly for ease of manufacture rather than strength.

The nut itself needs to be thicker than 11.2mm because of the taper, and the likelihood of them being removed and refitted often by the everyday idiot with poorly fitting wheel braces etc means the hex section is made a lot deeper to save them getting worn out.

My wheels are held on with nuts just like in your first picture and I'm perfectly happy with it.