16" 8 bolt Split Rims for 1.5 ton Australian Chevrolet Trucks

[Hanno Spoelstra]

Originally Posted by Bob Carriere

Regarding the 6 stud wheels used by the HUP and now I learn also by the Dodge axles of RHD drive Canadian made trucks.

Dodge T-212 8-cwt truck only. The MCP 15-cwt’s have the same 8-bolt WD split rim as CMP 15-cwt trucks.

here are some slight differences wed have observed..... the six stud wheels MUST have a different taper than a regular CMP 8 bolts version......as the 900x16 tires do slip down easier than the 5 degree C15a rims.

The six stud wheels/rims I have seen all have the Kelsey-Hayes stamping which includes the date of manufacturing.

It also seems from comparing GM parts listing that the early first 200 Lynx Mk I also shared the six stud brake drum on the front axle.

Comments????

The six-stud CMP wheel was used on 8-cwt trucks. It doesn’t have a different bead taper, it simply has a smaller diameter as explained in Mike’s thread here:
http://www.mapleleafup.net/forums/showthread.php?t=1594

HTH,
Hanno

[Grant Bowker]

Hanno,
I haven't measured the two types of Canadian 16" rims to confirm actual size and shape but what you are saying ("The six-stud CMP wheel was used on 8-cwt trucks. It doesn’t have a different bead taper, it simply has a smaller diameter") is in conflict with the AEDB design record that states the rim for use with 9.25-16 tires has a 5 degree rim base taper and the rim for use with 9.00-16 and 10.50-16 tires has a 1-1/2 degree taper. The AEDB record doesn't give a diameter at the bead seat other than the nominal 16".

Mike's measurements (taken from tires) show both a smaller diameter and a greater taper (assuming the tire wall was of similar thickness at the bead seat) for tires intended for use with the "American" rim.

[Tony Smith]

Originally Posted by Hanno Spoelstra

The six-stud CMP wheel ....... doesn’t have a different bead taper, it simply has a smaller diameter ...[/url]

It actually HAS BOTH.

[Hanno Spoelstra]

Originally Posted by Grant Bowker

I haven't measured the two types of Canadian 16" rims to confirm actual size and shape but what you are saying ("The six-stud CMP wheel was used on 8-cwt trucks. It doesn’t have a different bead taper, it simply has a smaller diameter") is in conflict with the AEDB design record that states the rim for use with 9.25-16 tires has a 5 degree rim base taper and the rim for use with 9.00-16 and 10.50-16 tires has a 1-1/2 degree taper. The AEDB record doesn't give a diameter at the bead seat other than the nominal 16".

Grant, thanks for correcting me in that the rim base taper differs between the 6-stud and 8-stud WD split rim. Good to see you quoting the AEDB Design Record, it is those primary sources which we need to refer to more often.

I made that remark as most people think only the rim base taper is different, which isn't true - see Tony's remark below. A 3.5 degree difference in rim base taper would go unnoticed when fitting a tyre. A larger rim diameter does.

Originally Posted by Tony Smith

It actually HAS BOTH.

Thanks for clearing that up, Tony.

Hanno