REAR SUSPENSION TUNING, THE LO-TEC WAY By John R Davies (Cheers)        The worst feature of the Triumph swing axle and variants is the astounding amount of positive camber that can occur. Positive camber means that the top of the wheel is further from the car's centre line than the bottom. When you are going round corners, positive camber is BAD!         In a corner, the only thing that stops you flying sideways off the road is the grip of the tyres. For maximum grip, as much