ChiDiver - Since the 275's are actually smaller in diameter, wouldn't the gear ratio go the other way, to 3:79 from 3:55. Not trying to be picky, I'm just making sure I understand.
Interesting tidbit. The 265's turn 657 rotations per mile, and the 275's turn 694 rotations per mile. So the 265's should get better mileage on the highway. But the 275's would offer better pickup, I think.
So anyway, back to the looks. I've just seen some trucks with some really dinky tires, they just don't look right.
As far as looks I like the wider 275/60/17(30") but my truck has a 2" rear drop that decreases the wheel well. In my opinion the wider ones look better, but that's just that, my opinion. Your's is the one that ultimately matters the most.
Whenever you go to a nonstock tire size there is going to be a speedo difference. A true 60 mph will indicate ~ 3.5 mph off if you go from one of those tire sizes to the other.
If you go to the larger diameter from the smaller then your speedo will read ~56.5 mph at a true 60 mph.
If you go to the smaller diameter from the larger then your speedo will read ~ 63.5 mph at a true 60 mph.
Rule of thumb: smaller diameter tires=feels like lower gears
Larger diameter tires=feels like taller gears.
As soon as you put larger diameter tires on your truck, your first impression will be lack of power because you were used to the smaller tires. When I had my Dodge Ram, I went from 245's to 265's and there was a big difference in the perceived feel of power.
As a side note: I had someone tell me one time that the computer can be reprogrammed for the new tire size so the speedometer reads correctly. I don't know if that is true, but it would sure make things a bit easier. Years ago, all we had to do is replace the little gear at the end of the speedo cable where it attached to the drivetrain with a different ratio gear so the speedometer would read correctly. That's a heck of a lot cheaper than swapping out the ring and pinion just because you bought tires one size larger. THAT really has never made any sense to me at all. Sheesh, change something else or just leave it.
I did this exact switch to my 99 Sport and lost a good 2mpg as a result! I tto thought the increased tire height would equate to a higher rear gear, and thus improve my mileage on the highway. It didn't! I would stick with the 275/60-17's if I were you, or go to the 275/65/17's, which is what I should have done. Unfortunately, the tires I wanted (Bridgestone Revos) only came in 265/70-17, and the loss of power was also noticable. Switching to a 3.73 gear would probably counter the change in tire height, but that's another added expense! I just hope the choices is better amoung the 275/60-17 tires when it comes time to purchase my next set!
My Truck: 03 Explorer Limited 4X4, 4.0L V6, Tow Package, and all the other goodies they pack into a Limited!
Former Truck: 99 White F-150 XLT SC Sport, 4.6L, Auto, Captain Chairs, Class III Towing Package, 3.55 LS, Sliding Rear Window, 4X2, CD, Century Fiberglass Cover, K&N Filter, Line-X Spray on Bed Liner, Gibson Side Swept Cat Back System, Superchips Flip Chip, and the Original F150online Decal...
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