Drill bit size

[69veedub]

My only problem now is trying to find some blank rear drums for a '73 1303. I was gonna try to use the old rotors and drums, but I can't seem to find a spot where the 108mm 5 bolt pattern ( I accidentally got the wrong bolt pattern on ebay) doesn't colide with the stock 130mm 4 bolt pattern.

[69veedub]

I guess I dont need to buy new rotors and drums, it turns out my tuner lugs are 12 x 1.5 mm. So it turns out i have enough clearance to drill a 5 hole bolt pattern in my existing brakes. So now I have to figure out what drill bit is needed for the 12 x 1.5 mm press in studs.

[Tedzbug]

also.......... offset every other hole pattern, you need full coverage over the brake pad area

[Tim]

According to product detail shown on Aircooled.net, drill out the lug holes to 9/16" and then drill to 37/64"

http://www.aircooled.net/new-bin/vie...09200686883098

[Mikey]

Originally Posted by Tim

According to product detail shown on Aircooled.net, drill out the lug holes to 9/16" and then drill to 37/64"

http://www.aircooled.net/new-bin/vie...09200686883098

That's for the 14mm studs they're selling, not for 12mm he's asking about.