Hey guys, I've been doing quite a lot of reasearch over the past week trying to configure what I would like on my Tundra. I am about to purchase one this next week. I have decided to go with the 305 tires on a Limited Tundra.
My ?, and it probably will seem like a stupid one

If you purchase the 20 inch wheels and want to change the tires they normally come with for the 305s do the dealers usually give you a break in the price in exhange for the 305s or do they just add it on and make the purchaser sell the tires later. I guess anything is negotiable but I was curious if this was a routine thing before I started to seriously negotiate with the dealership.
Thanks