Chiadog wrote:I'll make the case for 15's for ME in MY situation. YMMV.
1. 15's of the same overall diameter as stock 16's have a significantly "deeper" sidewall. I am expecting a less harsh ride from 15's.
2. My favorite Hankook Optimo 727 tires in 15" are $30 cheaper than 16"s per TIRE! I'll save $120.00 on a set of tires. I'm talking 195-65-15 vs 205-55-16.
3.Traction in snow! The footprint or size of the contact patch of stock 16's is too large for a car the mass of the Vibe (in snow). The smaller contact patch of the 15's should allow the Vibe to have traction in snow as good as my (185-65-14) Saturn SL1, which is awesome with the Hankook's.
Hopefully, I'll find some 15's so I can put my ideas to the test! And let you all know how it works, of coarse.
1. With experience going from 15's to 17's, the ride difference isn't really significant. I'd say you feel more steering weight with the larger diameter rims, and of course body roll. I could turn the wheel 15 degrees (roughly) in either direction back and forth while going straight on a highway and get just body roll due to the larger sidewall. That said, the 17's I have in particular have a mushy sidewall, so saying there's a difference means something.
2. Yeah... that will happen. Buying new tires for my 17's in a few years is going to be expensive, and not just because I'm going to go for the best!
3. I've conquered mountains with my 15" snow tires (not really, but I swear by them), but when I had my all-season 16's deep stuff never gave me too much trouble. The fact that they were all-seasons makes more of a difference than width. In theory it makes a difference, but in practice you lose literally a centimeter of tire width. 195/65/15 suit the Corolla better than the Vibe. On the Vibe, a heavier vehicle, they look more like pizza cutters. Also, the car will tend to follow highway grooves a lot more with the thinner tire, and the taller sidewall makes it easier for the tread to move before the car does.
If you find some pre-mounted snow tires on Craigslist that fit you might be better off doing that than buying rims and adding tires later, regardless of rim size. Also, I don't use hub-centric spacers on my winter wheels and I have no problems.