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No, not used them and they are claimed to be a non expedition rim as stated but actual build/skill of builder will dictate how much of a safe load, I've ridden open pros with 32 spokes with over 180kg on board (excl bike weight)
Carbide rims are different to ceramic and my experience of a set of Matrix 700C was positive, I've no reason to think the Rigida ones would be much if any difference performance wise.Here's some chat about carbide rims https://yacf.co.uk/forum/index.php?topic=5394.0 similar to one of the posters I've used std ceramic pads (WTB and kool stop) so you're not limited to the Swiss stop blue as SJS recommend but I know some people like to stick exactly to the letter/manufacturers spec.
I've always liked Rigida's anyway and never had a bad rim from them.
HTH -
Haven’t used CSS rims myself but my colleague has and I’ve worked on his bike.
He uses the recommended pads but they’d been round the world (literally, he did a commonwealth tour thing) and they looked brand new.
In comparison I’ve had CD and ceramic Mavics and it’s definitely a case of when, not if, the coating will come off. Ceramic might be a couple years down the line, CD might be a couple weeks depending what conditions you ride in.
Thanks Mr_Bump, must admit I'd never heard of the Rigida Grizzly CSS before, do you have any experience with them?