I just tried a gimbal on a bicycle.
Gimbal : Vimble C (attached to the bike stem using a ski scratch fastener)
Smartphone : Wiko P4200AN (similar to Lenny 3)
Bicycle : metrovelo.
The sequence ended up when my smartphone collapsed and only the back part remained in the gimbal holder 
But the sequence is promising. You can see in road turns that pictures are still well horizontal.