Originally Posted by
The Golden Boy
You're not saving 5 pounds on a steel frame. A decent steel frame is around 6 pounds. If you've got a stock build on that Trek 400, you can save a lot on your build.
This: It is impossible to save 5 pounds on a steel bike by changing to a lighter frame. Don't forget as well that the wider the tire the more it weighs unless you can find very lightweight wide tires. Steel bikes that weigh under 20 pounds have to use the lightest weight components possible