Erm.. they're not 'fragile' and the performance gains over a 30yo steel track bike are huge.. over a new alu or good steel bike, less so but noticeable.
I road a 50 year old steel road/path frame (complete with clearence for mudguards and pump pegs !) with airlite hubs and fiamme/mavic sprint rims during track league this year. Didn't notice any difference between it and a modern aluminuim track frame, and I don't think I'd notice the difference between it and a Carbon frame.
I'm sure Chris Hoy would flex my poor frame into oblivion, but for a 4th cat chipper like myself there's isn't much of a difference between frames.
I road a 50 year old steel road/path frame (complete with clearence for mudguards and pump pegs !) with airlite hubs and fiamme/mavic sprint rims during track league this year. Didn't notice any difference between it and a modern aluminuim track frame, and I don't think I'd notice the difference between it and a Carbon frame.
I'm sure Chris Hoy would flex my poor frame into oblivion, but for a 4th cat chipper like myself there's isn't much of a difference between frames.