How does the Jeep handle with the RTT on there? And how big a hit on economy did you take? I recently put a rack with a basket (just a simple Yakima deal) and it killed economy and in high winds forced me to downshift a bunch. It made me VERY glad I didn't get a rack and instead went the camper route, but sometimes it is fun to think about the original plan.
The little rack costs me around 2 mpg and the afore mentioned drivability concerns. The camper costs me 3-5 mpg (depending on having the bike and a full water load as well as the whole family in the Jeep) but is INFINITELY more comfy and with the brake controller, minimal drivability impact (aside from going a bit slower). Since it takes minutes to hook up the camper and go, and with a rack, I'll always have the hit on economy, I just can't see it as worthwhile. Plus, our camper was only about $2k more than a Gobi and a RTT.
I know it's there but it doesn't really affect the Jeep. I have had the Jeep pretty far off camber without issue... I'm aware of it, but a bit more caution when off-road and it seems to be a non issue where I go.
In the case of my Jeep, a Rubicon with 4.10 gears and a manual transmission, I had no real change in my fuel economy with the roof rack and tent. 16mpg mixed driving all day everyday, nearly 18 on a long flat stretch at 65mph.
I really only lost mpg when I upgraded to 33s, maybe a half to one gallon or so
In high winds though, I've been in third/fourth gear or so barely able to go 45/50 when in a headwind. Crosswinds I've driven straight down the road but with the wheel at like 15 degrees of center.
Honestly though, I've had the same issues without the tent on as well coming through Palm Springs.
I think with my 3.8, and my gearing, I'm spinning so many rpm at freeway speed that the tent has little effect on fuel economy.
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