i'm no expert, but from my experience a slightly taller sidewall gives you more traction off the line because the tire has some give to it. Drag racing is a perfect example. They use massive sidewalls on the rear. Check out a video of a drag car in slow motion and you can see how much the rear tire gives in relation to the rim. I went from 18s to 19s and a smaller sidewall and noticed this. I compensated by going with a stickier tire. A slightly taller sidewall will also offer a bit of give in cornering which helps those that are less experienced in reading the car's attitude through a corner. I'm sure there are some physics at play as well, but I'm not educated to that extent to comment. Look at F1 cars. They have a pretty substantial sidewall and small diameter rim. There's a lot of weight saving in that setup, less rotational mass and the tires have enough give through the corners to absorb any small imperfections in the road. Keep in mind F1 tires are highly reinforced in the sidewall to sustain the performance levels that are on demand for a 2 hr race at pretty insane speeds.prsrcokr said:I've noticed a couple of local hot shoes use setups like this (FWD's that I've noticed)
Would an advantage be seen using a slightly taller rear tire of the same dia.?