When GM first introduced the Hybrid Tahoe, weight was an issue to get the final MPG's they wanted. The stance is lower than a traditional Tahoe, the front fascia is more "closed off" with deleted tow rings, the rear lift gate has less inner sheet metal, and yes....NO SPARE. Comes with a pair of gloves and a can of Fix A Flat. I'm one of those Jeep owners the OP mentioned with the large tires. I run 17 in wheels because I need alot of sidewall for off-roading. You can't run a smaller spare on a JK Wrangler (07 to present) due to the ESP. The smaller spare will be turning faster than the other 3 tires so it will "think" the vehicle is skidding. This will cause the ESP to apply brake pressure to that wheel. You can manually turn the system off but a smaller spare is not reccomended. BTW. When I bought my GMC 4500 flatbed w 19.5 wheels, I was surprised when it did not come with a spare or a can of Fix A Flat. LOL.