need bolt pattern and size for spare tire/wheel

[djohn]

Going to junk yard for a spare wheel & tire.  Anybody know what fits a 48 B1C?

 

[Los_Control]

B1C has a 5 on 5  bolt pattern. Lot of older larger gm cars had this pattern, pretty sure my 1991 chevy truck has the same, I have not pulled the wheels to verify though.

1955 Packard also had this same bolt pattern, in case you see one of them at the junk yard.

 

You might want to check the bolt pattern on existing wheels. My 1949 B1C had the front hubs or axles changed, and now has the same bolt pattern as a B1B 5 on 4.5"

 

To measure the wheel it is much easier to have the wheel off and face side down.

Measure a bolt hole from the far left side of the hole, across the center hole to the middle of the next lug bolt hole.

Yours should measure exactly 5"

While a B1B would measure 4.5"

A typical chevelle or camaro mid sized chevy would be 4.75"

 

The 5 on 5 bolt pattern you need would be a large GM like a 70's Buick Riveira or a Lasabre, really not that common today in a local pick a part.

I think my 91 chevy truck is the same, but it has aluminum wheels like most other cars you will find in a junk yard today.

Maybe others have more ideas on wheels that would fit. Your 3/4 ton B1C has oddball wheel size. A B1B with 4.5" bolt pattern will accept wheels from a jeep, ford explorer, ranger, rambler, mustang ... very common.

 

[Plymouthy Adams]

Dodge also had a number of vehicles with 5 x 5 wheels in alloy and steel.....modern 5 x 5 are plentiful across Mopar line up but offsets will come into play....offset may be an issue eve with wheels in the early 80's   the trend to positive off set actually started mid-late 50's  has been on the rise ever since. 

[Jomani]

Does the angle of the lug nut come into play when using newer wheels? I remember someone telling me a long time ago that older vehicles used a different angle where the lug nut seats against the wheel. I don’t know it that applies to Dodge...

[Plymouthy Adams]

60 degree usually only that later alloy uses a bulge style nut that displaces the torque across more surface for better securement....steel wheels and their small patch is basically unchanged....