91RS said:
Discount Tire has 14 tires in the stock size for a Denali:
Tire Products By Vehicle - Discount Tire . You're best bet is to stay with that size. The only other option for you is a 255/55/18 which has plenty of choices, but the price is about the same and is 1.7" shorter in overall diameter (which will put your speedometer reading 1.8% too fast). Not to mention it will probably look goofy.
Thanks for your efforts. I know I can find several brands of tires in my original size 245-60-18, however who ever replaced the OEM tires before I bought it (2008) put a new set of Michelin Cross Terrains in a 275-55-18 on, as replacements. I really like the look of the tires, the ride, the handling. The only thing about them is they are so old date wise. I may have to replace them before the tread wears out because the sidewalls are beginning to check. If I was running these tires in the southern USA they would have been gone a long time ago. Heat and this old a tire don't mix well from what I have read. I believe the recommendation is 6 years old max. Mine were turning 7 when installed new.
I have searched and the only tires I can find in a 275-55-18 are Khumo ECSTA STX and Michelin Latitude Touring TR. I am not fussy about the Khumo's and I haven't read a lot of good about this model of Michelin's. Other folks have said Tirerack has Michelin Cross Terrains but I can't find any in the 275-55-18 size, lots of 17" for you guys.
The 18" 275-55's are the ones I am looking for but I don't think they make them anymore. I suspect that the guy who put them on my truck got nearly the last set since the date stamps on the 4 tires was from 2001.
I have noticed another post asking about Coopers. I like Coopers, have had great luck with them, and would buy them again. In fact if I can't find something I like I will go with Cooper Discoverer CTS's, 245-60-18's.