[arcosine]

I put 205/70R15 tires on my Saturn, stock was 175/70R14 or 185/65R15. 11% larger diameter. Biggest thing is the brake pedal force, with 600 lbs loaded in the car there is not enough braking to stop when someone cuts in front and stops. For tire weight, yes it makes a difference on bumps. A lot more drag when driving trough water on the pavement too. I added wheel spacers to reduce the scrub radius, with out them the car didn't track as straight. The big tires have a lot more grip on hard cornering and I added a rear anti-sway bar. I didn't notice and increase in coasting distance from the 165/80R15 tires. The big tires are terrible in the snow and slush on the highway. Ice packs in around the wheel well, breaks off and rubs on the tire, not enough clearance.