I written to Ryde company, see if they want to send me a new rim
Nothing ventured, nothing gained, and it can't hurt to try. That said, it is possible Ryde may claim the cracks are evidence of past overpressure and so deny the claim. If this happens, you are at a dead end with them.
Otherwise, it maybe repairable with a aluminum welding ?
Rims are extrusions and solution heat-treated (grain structure normalizing as they are formed, then cool as they are wrapped in a hoop after emerging from the die).While it is possible to TiG-weld the seam (crack), it would be hard to control for localized heat distortion and very difficult to grind the resulting bead flat within the confines of the rim well.
If you have a TiG welder and want to do it as a hobby, fine. However, for the cost and effort required, I think it would be better to replace the rims with something else and call it a day.
All the best,
Dan.