...I think they make better bikes for climbing mountains.
The Indians also take the poor little fragile REs into the Himalayas, which by last reckoning a might bit hilly.
The original poster wanted to know if it was safe to ride home from the dealer on I-40, (70 mph speed limit), climb Old Fort Mountain (always semi's overheated climbing that hill, 7% grade for 5 miles) with his wife on back (400 lbs total) with a new, not broken in bike. I offered him my trailer.A broken in bike can handle the mountains. This was a recipe for disaster.