I don’t think the cambium would be a good idea for the strida due to the riding position on the strida is more upright than forward angled which one of those seats like the b17 is designed for. The best seats are the wider ones with springs like the B67 which would offset alot of the shock and vibrations going up your spine on rough roads. I myself use a specialized expedition with metal springs and wide and was able to do a 60km ride with it feeling no pain at all.