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If the tire were to be used on the rear of the car, the worst that would happen is the ABS light would come on (and possibly the low tire indicator, if so equipped). If it were on the front end (since the Passat is a front wheel drive vehicle), you run the risk of damaging the transaxle (the differential in the transaxle to be specific).
Tyre diameter is just like gear ratio. Big diameter is like a tall diff which makes takeoff slower, makes the engine last longer and to a certain extent increases fuel economy. Small diameter has the opposite effect. Experiments with tyre diameter are a cheap way to anticipate performance with a changed diff ratio.
Usually you'll find that you can change the aspect ratio if changing the width too. For example, 235/50R18 is nearly the same as 195/60R18 when considering the tire diameter. Similarly, 215/55R18 might be fine too. When doing this change, you need to be certain that the rim can accommodate the tire width.
The reason, of course, is that there is a limited amount of space between a car's suspension and body to fit rubber and wheel. There's also a lower limit on tire aspect ratio. If you're starting with a 205/35/15 tire, going up to 215/35/17 tire is larger, but you can't go wider from that point without going to aspect ratios that don't exist.
The tire is 205 mm wide; Second number: aspect ratio. The sidewall height of the tire is 0.45 times the section width; Third number: rim size in inches. The tire fits a 17" wheel. Tire diameter is (roughly) given by the wheel rim size plus two times the sidewall height. In the case of our 205/45-R17 tire, the diameter is roughly 616mm.
European metric, also called metric, is similar. No letter "P" is used as a prefix. The three-digit number at the beginning indicates cross section in millimeters. If the aspect ratio is lower than 82, the aspect ratio number will follow the section width number. If not, then no aspect ratio number will appear. So it will have an 82% aspect ratio.
Wheel size isn't determinative. Instead, it's the size (diameter and therefore circumference) of the tire that affects the car's gearing. Because tires can have different aspect ratios, same-size wheels with different aspect ratio tires will result in changed gearing. The overall tire diameter is what matters. –
Tire is the rubber Wheel / rim is the metal Some people call rim plus tire a wheel . Break down size 195/65 R15 195 is the width 65 is ratio of height / width R is radial 15 is the rim size . In a passenger car if the number of holes is the same then rims are typically compatible. Yes you can get some strange offset and width.
A tire's sidewall height - the distance from the wheel rim to to pavement surface - usually reduces as the wheel size increases, in order to maintain the tires' original circumference, and therefore, the accuracy of the car's speedometer. If 225/55-19 and 255/65-17 tires are about the same diameter, the tires will necessarily have a shorter ...
To change to a differant size, say my cars tyres which are 205/55 16, the maths are : Multiply the tyre’s width by the aspect ratio to get aspect height (205 x 0.55 = 112.75), Convert into inches (112.75 / 25.4 = 4.44), Double the aspect height (4.44 x 2 = 8.88), Add to the inside diameter of the tyre (8.88 + 16 = 24.88). 24.88 is the overall ...