tissueboxonwheels;133315 wroteI'm curious. So ozvolvo users use 35psi on their tyres even though the volvo manual says 26/28psi front and rear?
Yep.
For the same reason only a fool would follow the 'recommended' tyre pressures for an '81 Ford Laser (which were 21 PSI highway...)
That reason being : many manufacturers hide the deficiencies of their suspension tuning by recommending tyre pressures which result in giving the illusion of a soft ride. There's heaps of softness and compliance in an under-inflated tyre. Hides a multitude of sins. Until you actually really
drive the thing.
It's a bit like following the factory recommended camber setting on a 240, which was zero to 1 degree
positive camber. And some owners wondered why their 240s felt so bloddy twitchy at speed...
Manufacturers have their own agendas. Like the idiot who did the original HQ Holden suspension spec, and thought plow-ahead understeer was the epitome of "safe handling". A few years later, they put decent sway bars under the same design, called it RTS (radial tuned suspension) and suddenly the handling
was safe.
So some noddy will purposely screw up a good design or a setting to advance such agendas, and tyre pressures are an example of that.
35 PSI cold seems about right to me for a 240 on the street. The tyre isn't going to try to fall off the rim when cornering, nor cause problems under heavy braking.
