Going to 15" tires and wheels from the stock 14" tires and wheels raised the exposed plumbing on our 23D about 1.2" which is a big help for getting in and out of fuel stations without dragging damage.
I had to buy a sleeping bag, a trouble light and a 5 watt light bulb from the local Walmart the first night at our summer camp ground in the mountains as the temps were going into the mid 20s. Wrapping the exposed plumbing with a small light bulb inside kept it from freezing and breaking.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels