hub piolt wheels vs bud

[robertglines1]

are they interchangeable....how can you visibly tell difference....figured I might as well play the dumb card twice in a row..Bob

[Sean]

are they interchangeable

No.

how can you visibly tell difference

Stud-piloted or "Budd" wheels have chamfered lug holes.  Hub-piloted wheels have straight-bored lug holes.

-Sean
http://OurOdyssey.BlogSpot.com

[wildbob24]

Bob,

The lug holes in the hub-pilot wheels will also be noticeably smaller than the stud-pilot wheels.

Bob

[Sean]

The lug holes in the hub-pilot wheels will also be noticeably smaller than the stud-pilot wheels.

That depends on the wheel and the application.

For example, aluminum wheels made by Accuride and Alcoa for hub pilot retrofit applications, where the studs will not be replaced, actually have over-sized lug holes to accommodate sleeve nuts, and these holes will be larger than the stud pilot holes.  However, the holes will still be straight-sided.

-Sean
http://OurOdyssey.BlogSpot.com

[robertglines1]

must be bud...8 3/4 inch id on center hole and tapered holes for lug nuts..this was a salvage shell so I don't know what was original...nuts are tapered also and uses the two piece system on duals..what threw me off was the front and tag have a shoulder for the wheel to rest on..their hole are tapered not straight..this is a 1998 prevost XLE...my manual shows no difference from the wheels I have on the 1989 prevost....Am I rite with this conclusion?  Bob

[Sean]

You can't just go from the model year.  Most buses were available either way -- it was the customer/operator's choice whether to have the coach equipped with hub or stud pilot wheels.

Many stud-pilot hubs also have a shoulder for the wheel center hole.

-Sean
http://OurOdyssey.BlogSpot.com

[robertglines1]

From manual  stud pilot wheels have right thread on right side and left thread on left side....hub pilot wheels have right hand all way around...source prevost manual...I don't know if this is universal or not..also 2 piece fastening system on rear instead of only 1 nut for both wheels..sorry didn't find till this am...Bob

[TomC]

Stud piloted wheels have two nuts per hole-an inner stud and an outer nut.  Also- they are right handed and left handed depending on which side of the bus you are (usually the right with the right).  The main reason hub piloted wheels were brought out was eliminating 1/2 of the nuts, since they only require one nut per hole.  And- they are all right handed so only one kind of nut needs to be in inventory.  Typically, the vast majority of new heavy duty vehicles are now using hub piloted wheels.  The one big minus to hub piloted wheels-if they get bent, or are very hot and warped, they can be just about impossible to get off (stud piloted don't have that problem).  Stud piloted wheels can have the inner nut freeze up.  But a good wheel man should have the special wrench for that.   Good Luck, TomC