Oh, by the way:

The terrain in my area is quite rolling with few, if any, "true" flat areas.

I also carry, most rides (except rides purely for sport), some load.

If it's a "cargo run", it can be 40-50 lbs. or more; with the trailer, 70-100+ (estimated--I know
the load's heavy!! )

Maybe that's REALLY why I'm "slow"!!