[Piwoslaw]

For the 3rd year in a row I'm promising myself to replace Svietlana's summer tires. Now that it's getting urgent, I searched for tires with larger diameter than the 195/65R15 she has now, it appears that any tire with profile larger than 65 is only for commercial vehicles (delivery vans). Some of these have parameters not worse than what I'd find on tires for private/passenger vehicles. For example, I found Nokian cLine Van 195/70 R15 104/102 S C, which would give a 3% diameter increase, and it has FE category of C (on a scale of A to G), Rain handling A, and noise 70 dB. I can't find it's max sidewall pressure, but I'm sure it would be more than my current 51 psi.

Ideally, I'd like to find 185/80R15's as this would increase diameter by almost 7%, but the one's I've seen have worse parameters.

But before I search any further, is it safe (and legal) to mount van tires in a passenger car? Are there any potential downsides?