9/16 12 point for unit bearing bolts. 98% sure 1 11/16 for the spindle nut. Not sure on calipers but it's nothing special. Loosen spindle nut w/ truck still on ground so wheel won't spin. Have a box of bandaids and a case of beer on hand.

 

What year? 99 calipers have 10mm think, Allen head. You may require metric size to be exact. Napa sells them by application on a card for 16-20 bucks. Others too.

 

It's an 02

 

Then it may have the regular bolts. Just crawl under and look.
Slide rule calipers from Harbor area wondrous tool. They measure real well.

 

I'll jump on this thread and ask my question since its relevant:

Sears & Tractor Supply both have the right size bolt for the spindle nut but it's a 12 point & I'm not so sure how I feel about using a 12 point socket for a nut that torqued down to 175 ft/lbs. Will I be okay spending the $10 at Tractor supply or do I need to wait till Monday and go to the specialty shops and get a hex head socket?

Also, why on earth do places sell a 1&11/16 inch socket with a 3/4 inch drive as a 12 point head? I figure that anything with enough torque to warrant a 3/4 inch drive would automatically exclude a 12 point socket from being used.

 

When I needed one on the road to California I bought it at autozone in the 1/2" drive flavor and worked fine for me.
Unless the truck absolutely needs them done I wouldn't trust those 12 points to take it off, maybe putting it on, but not off.

 

You could put a breaker bar between the wheel studs and put the socket on and loosen it that way, or if you have an impact with enough balls to take it off to which is what I did. Don't forget when putting it all back together to use anti sieze! Won't have to fight so much next time.

9/16" 12 point for the wheel bearing bolts.
1-11/16" for the axle shaft nut

 

My 1" drives are 12 point sockets.

 

I'm gonna wait till I get my hands on the proper socket. A hex head 3/4" drive 1-11/16" socket.

But why are 1" drives made in a 12pt socket? Like honestly, if that much torque is needed isn't it gunna just strip a 12 point? @krs I'm interested to hear what you use those 1" drives on and in what other industries a 1" drive 12pt sockets are for. The only thing I can think of is if space is tight and you need the bigger shaft size that comes with a 12pt, but IF you consider the 3/4" drive or larger THEN isn't the application heavy duty enough where making a slightly larger area for a hex head to go in where it won't matter?

 

Most of the 1" drives that I've used over the years in Oil/Gas Facility construction are 12 point unless they are impact sockets. All of my 3/4" drive are 12 point except for my impact. The 3/4" set goes up to 2" and the 1" drive go up to 3-1/8". For very large piping.

 

The spindle nut socket size for a 2014 Dodge ram 2500 is 1 5/16.

 

Ratchet sockets are 12 point so that you can get the proper handle swing in tight places. You can not break a 12 point that thick by hand if properly fit. If you want 6 point you will find them in black impact sockets. Most of these nuts have a metric equivalent that may be a tighter fit. Parts stores like Napa have the axle nut socket on their tool rack by application and size for about 20 bucks.