long wheel studs

[bsimon]

I need longer wheel studs for my '94 Caterham. Does anyone have the dimensions for the knurl required? I know they are approximately .500" in diameter. I looked at the ARP catalog and it seems the only choices are Honda .485" and Miata .507".

 

 

 

Part numbers would be helpfull.

 

 

 

TIA

 

 

 

-Bob

[yellowss7]

I don't know about a 94, but on a 2001 with the dedion rear, M12 x 1.5 by 40mm long is what the boys on BlatChat confirm.

 

 

 

Tom

[bsimon]

What's the knurl diameter?

 

 

 

-Bob

 

 

[yellowss7]

M12 is the size of the stud,1.5 is the thread pitch. Don't know what a Knurl diameter is. yellowss72007-04-18 08:58:53

[scannon]

Take one of yours to a NAPA store, they have a catalog of replacement studs that shows the sizes including knurl size along with pictures. They should be able to match you up with something.

 

 

 

I managed to get some longer ones for my Miata which turned out to be from an MPV minivan.

 

 

 

Skip

[bsimon]

I finally found long wheel studs that fit Caterham hubs perfectly.

 

For the record;

 

The standard studs supplied by Caterham are 36mm long. Measuring over the splines reveals they are .509 (12.95mm) in diameter.

 

I pulled various studs from the Dorman parts bins at the local CarQuest. Regardless of what the Dorman catalog says, the diameters are rather ambiguous. Only by actual measuring did I find the correct fit.

 

The original Caterham studs are Dorman 610-294, cataloged at 12.95(.509in) diameter x 36mm long. To get 42mm studs, ask for Dorman 610-340. They are listed at 13.08mm diameter x 42mm long. In reality they are exactly .509 (12.95mm) diameter. they press in with just the right amount of force. The 42mm length meets the stud length requirements of most sanctioning bodies with all but the very thickest alloy wheel centers.

 

The shoulder on the 610-340 is short enough to allow mounting alloy wheels without worrying about shouldering the thread on the nuts. If you mount steel wheels or use counter bored pickup truck style lug nuts you may want to check and make sure the wheel nuts are actually tightening with out hitting the shoulders. Also make sure you are not bottoming the threads if you insist on using bling type closed end lug nuts.

 

Checker and Autozone carry Dorman products, however they may have to order enough of them from the warehouse if you need a full complement of studs.

 

If you have the upgraded machined alloy sealed bearing hubs and stub axles, you may want to double check this data. I've only evaluated these studs for use with standard steel or cast alloy Caterham front hubs with the 4 x 108 PCD.