Hub rotor bolt circle

Hoghead

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570
I am working on a brake design and would appreciate the Bolt size and bolt circle for the front rotor where it bolts to the hub
It needs to be accurate as I plan to drill a rotor

My car and I are thousands of miles apart right now so cannot measure it myself
 

Theorangetiger

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CAT Member
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332
The original bolt pattern is a 4 1/4" diameter circle. I believe the lugs are 7/16" but can't measure one right now.
 

Hoghead

Gold forum user
Messages
570
That sounds like the wheel studs. I am looking for the measurement that holds the rotor to the hub
Is it the same?
 

Theorangetiger

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CAT Member
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332
I get what you are asking for now but unfortunately can't supply the specs you need. If you're really in a bind I can pop mine off and get the dimensions.
 

66TigerMK1A

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Messages
1,129
Bolt centers are 85 mm as close as I can figure...

Bolts are 3/8" and holes are slightly bigger @ .38"

Center hole is 66.5 mm with a small chamfer on the hub side
 
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