Surfskate

To adjust how a truck turns, you need to find your skateboard's kingpin. Tightening the kingpin with a T-tool will make your skateboard more rigid. On the other hand, loosening it will make it more manoeuvrable.
But be careful not to overtighten the hanger as this could damage the surrounding bands.
If you loosen the kingpin too much, you may experience wheel bite. This is when the wheel touches the board while turning, causing it to instantly lock up.

As with the trucks, use your T-tool to loosen the nut around the axle (at the end of the truck axle) to free the wheel from its nut. Be careful to only loosen it slightly so that the wheel can turn without coming off the truck.