light shaking between 40-50 usually refers to bad balancing of the front wheels.
To add: is there a lot of balancing 'lead' on the wheels atm? This would indicate the wheels were 'off' either due to not being entirely straight or due to the bore process having been done incorrectly.
If there is little lead on the wheels then I would guess it needs better balancing.
Is the hub on the car too big? Then the wheel would never fit...
If the hole in the wheel is too big get plastic filler rings
Last edited by Reuvers; 01-16-2013 at 12:59 AM.
Reason: more info