i have a pair of the old css Open Pros and I can confirm they last for ever, and brake really well, and the black coating doesn't wear off. they're fantastic, but they don't make them anymore. I understand that these https://www.sjscycles.co.uk/rims-tape/32-rigida-grizzly-700c-622-touring-rim-with-css-side-wall-black/ are the same coating, but i've never used them so can't confirm. These are the ones I have
The rim wall is slightly grainy in texture - that's the coating. these are the newer ones, that wear off
i have a pair of the old css Open Pros and I can confirm they last for ever, and brake really well, and the black coating doesn't wear off. they're fantastic, but they don't make them anymore. I understand that these https://www.sjscycles.co.uk/rims-tape/32-rigida-grizzly-700c-622-touring-rim-with-css-side-wall-black/ are the same coating, but i've never used them so can't confirm. These are the ones I have
The rim wall is slightly grainy in texture - that's the coating. these are the newer ones, that wear off