Longer studs needed?
Moderators: User administrators, Moderators
- Shinnster
- Registered user
- Posts: 212
- Joined: 17 Aug 2020, 14:19
- 80-90 Mem No: 17392
- Location: West London
- Contact:
Longer studs needed?
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
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
1988 1.9 DG, 4 speed Tin top with double sliders.
Re: Longer studs needed?
Think the broad rule of thumb is that the length of thread engaged should be at least equal to the diameter of the fixing.
1990 1.9DG 34DAT carb Leisuredrive hightop
- clift_d
- Registered user
- Posts: 3297
- Joined: 04 Oct 2012, 23:51
- 80-90 Mem No: 11695
- Location: Hackney innit
Re: Longer studs needed?
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.
1988 LHD T25 1.6TD Westfalia Club Joker Hightop syncro
Re: Longer studs needed?
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.
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.
'89 1.9 DG
“It's Easier to Fool People Than It Is to Convince Them That They Have Been Fooled.” ~ Mark Twain.
“It's Easier to Fool People Than It Is to Convince Them That They Have Been Fooled.” ~ Mark Twain.
- Shinnster
- Registered user
- Posts: 212
- Joined: 17 Aug 2020, 14:19
- 80-90 Mem No: 17392
- Location: West London
- Contact:
Re: Longer studs needed?
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.
now who the hell has a 500nm torque wrench! i sure dont lol
cheers for the info guys.
1988 1.9 DG, 4 speed Tin top with double sliders.
- Shinnster
- Registered user
- Posts: 212
- Joined: 17 Aug 2020, 14:19
- 80-90 Mem No: 17392
- Location: West London
- Contact:
Re: Longer studs needed?
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?
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?
1988 1.9 DG, 4 speed Tin top with double sliders.
-
- Trader
- Posts: 2599
- Joined: 27 May 2009, 18:56
- 80-90 Mem No: 16628
- Location: hayling island
Re: Longer studs needed?
Are the nuts fully tightened? It looks like you could get another turn ? One or 2 threads below the face is fine
- Shinnster
- Registered user
- Posts: 212
- Joined: 17 Aug 2020, 14:19
- 80-90 Mem No: 17392
- Location: West London
- Contact:
Re: Longer studs needed?
thats the old studs in the pic, new ones fitted and are way too long now and look stupid
1988 1.9 DG, 4 speed Tin top with double sliders.
-
- Registered user
- Posts: 597
- Joined: 21 Feb 2010, 20:50
- 80-90 Mem No: 17450
- Location: Derbyshire
Re: Longer studs needed?
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.
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.