Most of my bikes are in the 22-23 lb range unless it's my sported-up Legend which is 19.8 lbs. If I am riding for exercise, fun, and challenging myself, it's normally a distance of 20-40 miles and I pretty consistently average 17mph over varied terrain. If headwind isn't hammering me, then 18-20mph cruising speed is doable over distance, and nearer to 30 if I have a decent tailwind. Casual speed is 13-15 mph, and it doesn't really matter the weight of the bike as they're all about the same.