The time has come for new tyres. 110/90 x 18 on WM3 rear rim is 10 years old and near legal limit, 90/90 x 19 on WM2 front rim has plenty of tread left but is pushing 20 years old. It is probable that the inner tubes are at least as old so time for some new ones. These are Avon Roadriders and while I would happily replace like-for-like, that isn't an option at present until they come back into production, if ever.
I have spent the afternoon doing an audit of options which I have uploaded (hopefully it remains readable) for the benefit of anyone else in the same position. I have no connection with the named supplier, they were just a convenient constant for my availability search.
A question on widths and profiles - the 110/90 x 18 on WM3 clears OK on my 850 Mk1. The obvious non-metric 4.00 width tyre available from some suppliers is OK on a WM3 rim but I don't know how wide these tyres would be compared with the 110/90. 4" is several mm narrower than 110mm but it is a rare day that you will measure an actual tyre width and find it is the same as the nominal size. Does anyone have any experience of the 4.00" fit? And what sort of tyre height to expect?
Suggestions/advice/recommendations welcome!
Mark
tyre sizes
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https://www.avontyres.com/en-gb/tyres/roadrider-mkii
shows all the dimensions of Roadrider 2's. I realise that there is a shortage right now, but don't other manufacturers provide this information? I have googled for dimensions of tyres in the past and sometimes found that tyre distributors list the relevant data.