I have 275-60-15's on 10" wide wheels on my pickup and they look kinda small. If you mount them on an 8 or 8.5 rim the sidewalls start to bulge out a lot more and they look a lot better.

My brother has a set of 275's on 7" wide buick rallye wheels. Looks awesome, but the tire wears poorly since the rim is really too narrow for that wide of a tire.

I need new tires for my truck and would like something wider than the 275's. The only thing available is the 295-50's and they are a lot shorter which is going to raise my cruising rpm up and kill some mpg in the process.