Hello everyone,
Came across this thread due to exactly the same problem on my Strida SX. Actually it developed on both SX’s I’ve had - I sold the first one to a friend and he discovered the rear wheel movement afterwards.
I haven’t disassembled my SX yet, but I expect the damage to be quite serious - the sideways movement of the wheel is ca. 1 cm, although it’s not present all the time.
Blackstridaaustria - would you be so kind and post (or re-post) the pictures and specs of the repair kit you developed? I would be very grateful indeed!
All the best,
Maciej