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I've only just seen that fascinating ad and description of the Dunlop range of tubs.
It may not be immediately obvious, but I'm pretty certain it is pre-war.
I say this for two reasons:
Some of the tread patterns shown are different from the post war versions - the no. 2 is shown as having a plain tread, whereas the no 2's shown in the thread above are ribbed, which is how I remember them ( even I don't remember seeing the pre-war version). There are some other differences, for example the no. 3 I remember was more like a smaller version of the no. 5.
The prices: I'm sure these are pre-war prices.
There was something like a 300% inflation between the 1930's and the '50's.
So, pre-war, Cycling (the magazine) cost 2d. (i.e. £1 would buy you 120 copies!, in the '50's it was 6d), a reasonably good wage would have been £5 per week, a gallon of petrol (4.5 litres) about 7p. and a suburban three bed house (London) about £500. You can make your own estimates of the rate between the 1930's and the 2020's, but it's got to be at least 100 fold*, and more like 200 - excluding real property, obvs.
I think this will give some idea of just how expensive Dunlop tubs were, and why people would ride out to races carrying their racing wheels on sprint carriers - the tyres were far too precious to use for anything except actual racing.
- I mean you need to multiply by 100 (or 200) - I don't mean 100% which is only multiplying by 2.
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@Jonny69 Nice links there, that Dagworth and District Gentlemen's Cycling Society page is great! Agree your conclusion regarding 1” being common width back then. Makes me think I should try 25mm.
Wow, those Dunlop tubs!
Memory is a bit hazy, but there are two types of Fiamme rim. There's a lower profile type which has a more rounded top and it was intended for track-only bikes i.e. without brakes. If you look in the old catalogues you can see the difference. I don't think you can use brakes with those because the rim isn't deep enough to accommodate a brake block on the side of it. I have a feeling your new ones might be those.
Re. buying tubs, I had a similar situation. I came to the conclusion that the common size back then was 1", not as skinny as 21/22/23mm like they are these days. I went for Challenge Vulcano in 25mm and there's also the Challenge Strada Bianca tan wall in 30mm which has the same ribbed tread pattern as those Dunlops (edit: though I just checked and it doesn't seem to have the ribs any more). That was a few years ago I bought those, mind, and the trend with tyres has gone a bit wider so you might find more 25-28mm tubs these days.
Check out these:
https://www.flickr.com/photos/23666168@N04/16565483866/
http://www.users.globalnet.co.uk/~pattle/ddgcs/tyres2.htm