When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
No there not. A wider tire will grab better if the tire design is the same.
The difference is going to be minimal. Most people go for a 315 Sumi which isn't going to get traction at all. A 315 NT-555 won't grip as much as other street 275's. I would rather have a smaller tire with more grip and less weight than the 315 just for looks.