info needed brake experts
#1
![Default](https://passionford.com/forum/images/icons/icon1.gif)
on sierra 1ts a 19mm nut for wheels so m12 threaded stud
so the hole size in discs especially alloy bells what should this be?
obviously 12mm drill bit will be too small
ive lined up an m12 bolt with a pair of reyland bells i have it fits through fine but with a bit of play around the thread
is this alright,because the other ones i have have had a 14mm drill to make holes and therfore a bit side to side play,the centre circle fits tight on hub okay but the disc will move a little left to right until wheel is bolted on and pushing it tight
is this dodgy
so the hole size in discs especially alloy bells what should this be?
obviously 12mm drill bit will be too small
ive lined up an m12 bolt with a pair of reyland bells i have it fits through fine but with a bit of play around the thread
is this alright,because the other ones i have have had a 14mm drill to make holes and therfore a bit side to side play,the centre circle fits tight on hub okay but the disc will move a little left to right until wheel is bolted on and pushing it tight
is this dodgy
#2
Not entirely sane
![Default](https://passionford.com/forum/images/icons/icon1.gif)
Normal clearance hole for a metric thread is 0.5 mm, so for M12 it would be 12.5 mm. As long as the centre hole in the disc is a good fit on the hub spigot then it shouldn't cause an issue if the stud holes are a little large. The disc may slip round a little until the studs contact the sides of the holes but the disc will still be concentric to the hub.
Thread
Thread Starter
Forum
Replies
Last Post
track.focus'd
Restorations, Rebuilds & Projects.
26
12-08-2015 05:53 PM
Jack and the Beanstalk
Ford Sierra/Sapphire/RS500 Cosworth
2
09-08-2015 07:03 PM