Originally Posted by Iride01

Some of the old steel frame bikes are as light as many of the aluminum and less expensive CF bikes that many ride. And old steel bikes can still give you the same position on the bike. So depending on what your old steel bike is will make a difference.

A 30 to 46 pound bike will still let you go fast. But not for as long. Especially if in rolling terrain or hillier. If you are going to do long group rides, you would do well to keep your bike light. 21 - 23 lbs is reasonable even for many of the lightweight steel bike of the past. Even 18 lbs for some. But many of those had rider weight limits and were said to be too flexy. 18 -19 lbs isn't unreasonable for a really good aluminum bike or a good CF bike. And you can get lighter still.

Just keep in mind that more weight takes more power to accelerate or to climb. And the effect is cumulative over the time of the ride. Power is energy. You only have so much to give to any particular ride.