The RockyMounts MonoRail Solo 1 Bike Platform Rack - 1-1/4" and 2" Hitches - Wheel Mount # RKY10007 that you mentioned has a shank rise of about 4-3/4". This is a fairly similar amount of shank rise compared to the other 1-bike carriers that are available for your 40lb electric bike.
If you think this will be an issue for you then I highly recommend looking into the Yakima OnRamp Bike Rack for 2 Electric Bikes - 2" Hitches # Y36FR instead of the RockyMounts. While this is more bike rack... view full answer...
The Replacement Shroud for Dometic Duo-Therm RV Air Conditioner part # DMC69FR measures approximately 34-1/2" long x 30" wide x 10-3/4" tall. view full answer...
This is a great question and one that can cause some confusion. SumoSprings capacity is determined by how much weight it takes to compress the spring down to 50% of its original body height, so a spring like the # SSF-106-40 will compress down to half of it's unweighted height with 500-lbs of pressure. The # SSF-106-47 is going to be a stronger spring with it's 1000-lbs capacity. Keep in mind, these aren't designed to upgrade the GVWR, but they're designed to help cushion the load that... view full answer...