CMP Wheels
 

Hi All.

I seem to have a surfeit of 20" CMP Wheels.

The sin of focusing on Gun Tractors and not what it tows.

I am looking to trade down to 16" as spares for the 25 pdr and Limber.

Anyone interested please PM me

I would also appreciate some education on CMP wheels. I have 12x20 on my FGT these are 7.5x20 and I have one with 7.5x20 all seem to be the same rims.

Gina

Gina, According to the MB-C1 and MB-F1 all 20" rims were fitted with 10-50 x20 tyres.

20" CMP rims
 

The 20" CMP rims are all the same size as shown in your photos, I think they are 6.00 at the rim.

Taa ..

My book said the same but every set of rims I have seems to have a different size and 11x20 seems to be popular.

Now to get rid of all the extras

Apparently, 1100-20 replaced 1050-20 during the war, and lasted for a long time afterwards, so that's probably what you want for the gun tractor.

Note this is a different size from 1100R20 (which caught me out, R tyres are on a reduced profile, so have a smaller overall diameter). It could be interesting to see if theres a modern R size that intersects with the old 1100-20 size, maybe around 1400R20.

1100x20 could be either, but seems more likely as 1100-20.

Lauren,Gina, I found a web site that gave sizes, but I didn't save the 1100 x 20 info.
A 7.00 x 20 = 180-100R20
A 7.50 x 20 = 190-100R20
A 8.25 x 20 = 210-100R20