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

 

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.

 

thats what i was thinking

the centre hole is bang on with hub so no play there

it was just the play on studs,but i assume once braked hard thats it they are not going to move from there

 

If you can find an old 1/2 inch drill that will sort you out at is is 12.7 mM

 

Thing is im useing the bells that have been drilled with 14mm drill
I think it will be okay