Hi all,

Just been measuring up my hubs, wheels and wheel nuts to figure out what size of wheel studs I need.

At the front, I measured a required stud length of 45mm, which works out nicely, since 47mm long studs are readily available.

At the rear however, I need a stud 50mm in length. The next size up I can find is 63mm long however, so should I fit 47mm studs here at the expense of 3mm of thread engagement, or should I get the 63mm studs instead?

(I've got open wheel nuts so the exposed thread on the longer studs shouldn't be an issue unless it upsets Mr Iva?)

Many thanks,
Jek

buy long one and trim

The studs MUST protrude from the nut.

Originally, I was thinking that the studs would need to protrude through the nut, but then I remembered closed wheel nuts.

Obviously with these, the thread can't protrude through, so if I used closed nuts, I would need to use the shorter studs?

For the weight of the Locost, you could probably get away with the 47mm but I'd still go with the long ones to be safe.

If you are one that torques wheels, it might damage the threads not having full engagement.

Plus if you ever buy new wheels and you need more stud, you'll have to change them out.

I seem to remember something about having 17 turns on wheel nuts.

Ok thanks guys, makes sense to get the longer studs. There don't seem to be many different lengths available so I imagine it's sometimes tricky to get the right lengths for closed nuts unless you chop them down to size.

Cheers,
Jek

IIRC the nut should have 1.5 turns sticking out.

Steve

Mine dont stick out on the front and nothing was said at the SVA.

The legal minimum required thread engagment is 6 turns for wheel nuts. So 9mm in most cases, and this is measured from the bottom of the tapered seat.

http://www.needforspeed.co.uk/htmlpages/TechWheels.htm

I know in engineering terms the max strength is at 1.5 times the stud diameter however.

ditto Flakmonkey