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Posted: Thu Jan 01, 1970 1:00 am
by Willie
Lo, I am in contact with a chap called
Reinhard who wanted to know which Minors
used the 3inch and 3 1/2 inch rims. Since i
have always known Minor wheels as 4J and
4 1/2J I told him they were not standard.
Now that I have measured my wheels I find that they ARE 4 inches across edge to edge
but only 3 inches inner wall to inner wall.
I always understood that the 'J' measurement
is from INNER wall to INNER wall of the rim
(i.e. where the tyre sidewalls touch). this
would make the MInor wheels 3J and 3 1/2J
Am I wrong???
Willie

Posted: Thu Jan 01, 1970 1:00 am
by ianselva
Iwould agree with you that the measurement is across the inner edges of the rim.
3" or 3 1/2 " would seem right for a Morry as the 59 mini came on 3 1/2J as standard , and 4 1/2J was only used on Cooper S.

Posted: Thu Jan 01, 1970 1:00 am
by les
I have always understood that 4 1/2 inch wheels were fitted to late commercials.

les

Posted: Thu Jan 01, 1970 1:00 am
by Willie
Correct. The 4 1/2 inch wheels were only fitted to the 8 cwt vans. from 1968.earlier van wheels are NOT wider than the
cars. the 4 1/2 inch measurement is across
the rim edge to edge. I believe this is NOT
the correct"J" measurement.
Willie

Posted: Thu Jan 01, 1970 1:00 am
by olly
From what I understand, saloons had 3J, 4cwt vans 3.5J, 6cwt vans 4J and 8cwt vans 4.5J (sought after by many!)
The measurement is from inside to inside.

Posted: Thu Jan 01, 1970 1:00 am
by Willie
Ummm, This gets more confusing, it seems to me that the wheels are wrongly called 4 1/2J
(late vans 1968 onwards....8 hundredweight)
when the 4 1/2 measurement is outer edge to
outer edge. This is not a correct "J" measurement. I also think that van wheels are the same as the cars until the advent of
the 8cwt van?? The 1098cc cars and vans had 5-20X14 tyres but I don't think the wheels
were any wider.
Willie.