265's are baby tires. they came stock on my truck and it just looked silly to have those tires. 285's are definitely the way to go. it didnt effect my 1/4 mile time, but i would care more about how my truck looks than how it performs in the 1/4 mile. its not like you race every second you drive. however, even when your truck is sitting or being seen on the road, people are saying "that looks cool, those tires fit nicely" or "those are tiny tires on that big truck." 90% of people dont care about 1/4 mile