Volvo 2006 C70 - Manual (Page 117)

Tire inflation pressure tables
Tire pressures recommended by Volvo for your vehicle. Refer to the tire inflation placard for information specific to
the tires installed on your vehicle at the factory.
Optional tire pressure. These inflation pressures may only be used when the vehicle is not fully loaded.
Load ratings
The load ratings in the tables above translate as follows:
91 = 1365 lbs (615 kg), 93 = 1433 lbs (650 kg), 99 = 1709 lbs (755 kg)
Speed ratings
The speed ratings in the tables translate as follows:
M = 81 mph (130 km/h), V= 149 mph (240 km/h), W= 168 mph (270 km/h)
See also
page 131 for an explanation of the designations on the sidewall of the tire.
pg. 131 Wheels and tires
Tire designations