Wheels vibrates too much on some surfaces

I live in Barcelona and most of the sidewalks have a type of mosaic designed not to slip. I have the Evolve GTX Bamboo series street wheels (Evolve 97mm) When I pass at moderate speed (6-12 mi/h) on the sidewalk in an area of vibrating tiles, the wheels vibrate a lot and move sideways. It's really dangerous and I feel really insecure.
Someone else happens? Is it a problem with the wheels? or with the trucks?

 

i'm a bamboo gt user, i'm also having a a same issue, and having a weird vibration and rattling sound.. i've already tighten all bolts..

 

Hmmmm sounds like a problem with the street surface.