I have several questions about proper fit and sizing for custom vintage bike frames...
As we are all aware, custom vintage racing bike frames were often fitted to the specific dimensions and needs of the customer through a series of body measurements and formula calculations. This custom sizing affects the tubing lengths and angles and selection of bike components for an optimum fit (ie stem length, handlebar width, seatpost height, positioning of the seat, etc). "Production" vintage framesets were often available only by seat tube height and only with "standard" component sets. Selection of vintage frames was often guided by an inseam measurement and how "comfortable" the customer felt riding the bike a short distance..
I have heard some people say that use of standard body measurements and frame sizing formulas can arrive a scientific "optimum" fit, while others say that it is more of a learned art than a science. Yet others say that custom frame angles are marketing hype and "standard" frame dimensions based on seat tube length should fit most rider needs.
My questions are:
1.) what were/are considered "standard" vintage road and track steel frameset dimensions and angles based on the seat tube length?
2.) I wonder which bike frame builders took the time to really customize frame dimensions for specific customers and how can you which manuf/model is has custom dimensions? For example, how can tell say a custom MASI or Marinoni Team frame from a standard factory model based solely on the frame construction?
3.) Are there any recommended websites that follow commonly accepted standards of applying body measurements to custom frame sizes and angles?
The only website for online custom fit frame formulas that I have noticed is at the following URL: <http://www.airborne.net/eready/janette/store/sizing_step1.asp>.
Comments from some of the framebuilders on the list would be appreciated...
Regards, Steve Neago
Cincinnati, OH