Volvo V70 XC70 III owners manual page 251

text version of content this owner's manual page from owners manual to the vehicle Volvo V70 XC70, year of production 2007:

06 Maintenance and specifications Wheels and tires Uniform Tire Quality Grading may have poor traction performance. The trac-WARNING ALL PASSENGER VEHICLE TIRES MUSTtion grade assigned to this tire is based onThe temperature grade for this tire is estab- CONFORM TO FEDERAL SAFETY braking (straight-ahead) traction tests and islished for a tire that is properly inflated and REQUIREMENTS IN ADDITION TO THESEnot a measure of cornering (turning) traction.not overloaded. Excessive speed, under- GRADES inflation, or excessive loading, either sepa- Quality grades can be found, where appli-WARNING rately or in combination, can cause heat cable, on the tire sidewall between the treadThe traction grade assigned to this tire isbuildup and tire failure. shoulder and maximum section width. Forbased on braking (straight-ahead) traction example: tests and is not a measure of corneringSnow chains, snow tires, studded tires (turning) traction. Treadwear 200 Traction AA Temperature A Snow chains TREADWEAR TEMPERATURE Snow chains can be used on your Volvo with The treadwear grade is a comparative ratingThe temperature grades are AA (the highest),the following restrictions: based on the wear rate of the tire when testedA, B, and C, representing the tire's resistance• Snow chains should be installed on front under controlled conditions on a specified gov-to the generation of heat and its ability to dis-wheels only. Use only Volvo approved ernment test course. For example, a tire gra-sipate heat when tested under controlled con-snow chains. ded 150 would wear one and one half (1 1/2)ditions on a specified indoor laboratory test• If accessory, aftermarket or "custom" tires times as well on the government course as awheel. Sustained high temperature can causeand wheels are installed and are of a size tire graded 100. The relative performance ofthe material of the tire to degenerate anddifferent than the original tires and wheels, tires depends upon the actual conditions ofreduce tire life, and excessive temperature can 06 their use, however, and many depart signifi-lead to sudden tire failure. The grade C corre-chains in some cases CANNOT be used. cantly from the norm due to variation in drivingsponds to a minimum level of performance thatSufficient clearances between chains and habits, maintenance practices and differencesall passenger vehicle tires must meet under thebrakes, suspension and body components Federal Motor Safety Standard No. 109.must be maintained. in road characteristics and climate. • Some strap-on type chains will interfere Grades B and A represent higher levels of per-with brake components and therefore TRACTION formance on the laboratory test wheel than theCANNOT be used. The traction grades, from highest to lowest, areminimum required by law. AA, A, B, and C, as measured under controlled • All Wheel Drive models: Snow chains conditions on specified government test sur- should only be installed on the front faces of asphalt and concrete. A tire marked C wheels. 251

owners manual Volvo V70 XC70

owners manual Volvo V70 XC70 - year of production: 2007 - Volvo V70 XC70 III owners manual EN