Wow, a 20 degree incline is really steep.
Our 10% grade test hill is a 200ft long incline that rises 20ft. That’s a little less than a 6 degree incline.
There is no single motor scooter that’s going to climb a 20 degree hill. You’re going to need at least a light-heavyweight scooter like a 60V Vsett10+ Kaabo Wolf Warrior X, Dualtron Victor etc, but even then, I’m not 100% sure they’re make it.
72V heavyweights like the Wolf King GT, NAMI, Storm, etc for sure will make it up a 20degree incline.
Here’s a clip of me flying up a 31.5% hill at >20 mph on a NAMI BURN-e
-Paul from ESG