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Re: Ball joints
If it was mine, I would crawl under the car with a 16mm and 18mm spanner and see what size the nuts are that hold it on.
If they are 16mm then the bolt diameter is usually 10mm.
If they are 18mm the bolt diameter is usually 12mm.
Don't go by the bolt head size. They like to play with that to wind us up.
If the ball joint has been replaced with new bolts supplied and used, they might be 17mm or 19mm.
17mm nut = 10mm dia bolt
19mm nut= 12mm dia bolt
So if nut is 18 or 19 then best guess is the 12mm version.
Currently in lancs dave's garage:
Scenic 1.4ish 2002. Clio 1.2 2002. Thunderbird 885 1995, Suzuki Gsx600f 1989. Fazer 600 2002. Specialist cement mixer for proffessionals only, not yer average forum numpty. Your car is probably worth more than all that lot put together.