Old saying "Speed costs money. How fast can you afford to go?"
Hmm..48v 20ah is 960wh...so 48 to 96 miles? Seems a bit unbelievable, but I can hope it's true!
That's like my battery, 48V 19.8Ah. Limited experience so far but my bike is a 1000W mid drive, heavy, 70lbs, I am 150lbs, and I'm running 4.5" tires at 4 psi on snow and 10 psi on hard trails. When temp is single digits to around 20F and I ride moderate hills on snow at 10ish MPH at PAS 1 or 2, I get an easy 2 hours or 20 plus miles. I did a couple long bike path rides at PAS 1 and 2 with temps in the high 30's F going 15 plus MPH and got over 50 miles with 30% charge left. I ordered a set of 27.5" wheels with 2.3" tires that I can run over 60 PSI and expect those to bump up my milage considerably. So 96 miles on a charge is not too farfetched I bet.