How safe is it to ride with one broken stud?
I'm going away Boxing day for 3 days about 350km away.
Can I leave it till I get back or should I find someone to do it before I go? Difficult just before christmas.
How big a job is it to get the disc off &do it myself?

 

Incredibly easy to do, provided you have an 18mm open ended wrench. Sockets dont fit.

Its safe to drive with just one missing..I drove on 2 missing for quite a while, and my old roommate has a silverado with 3 missing on one wheel, and has been driving on it for a year or so.

To replace them:

1. Remove wheel
2. Remove caliper (2 slide bolts on inside of caliper)
3. Remove caliper cage/rotor brace thing (18mm wrench...top bolt is too close to control arm to use a normal socket)
4. Remove rotor (might need some convincing with a hammer if its rusted on)
- Now your studs are exposed -
5. Hammer the broken stud out...liberal use of force
6. Place new stud in
7. Thread a lug nut onto the new stud upside down (so the flat surface is going to be against the bearing plate). Tighten the hell out of it (more liberal use of force). This pulls the stud into the bearing plate.
8. Remove lug nut
9. ta daaaaaaaaa

now replace the rotor, rotor cage, caliper (make sure you dont squish the rubber boots up against the caliper), and wheel.

 

It's really easy to do the hardest part will be getting the caliper off. i just did one the exact way that wolfpack said and it took like half hour.

 

I can live with 1/2 hour. I'll do it when I get back from my trip to the lakes.