most modern bikes are made with oval aluminum tubes,


aluminum isnt as flexy as steel is, if your aluminum tubes flex, you're in some deep trouble.
plus the oval shape helps stop flexing (which could destroy your bike)

where as steel flexes quite easily and can endure the stresses of bicycle riding. so the tubes are circular, which allows it to flex more than oval aluminum tubes.


nothing will ever match the ride of a steel bike.

I love steel bikes because they flex.