Frame Geometry Database
10-05-06 | 06:36 AM
#1
Thread Starter
Senior Member
Joined: Mar 2006
Posts: 159
Likes: 0
Bikes: 1979 Trek 510
Frame Geometry Database
All,
Could you post frame geometry information for your bikes? Links to catalog scans would also be greatly appreciated.
The information I need are:
Manufacturer, Model, Frame Size (seat tube length), Head Angle, Seat Tube Angle, Fork Offset (rake), Chainstay Length.
Information that would be nice to have are:
(Effective) Top Tube Length, Bottom Bracket Drop, Wheelbase.
My strong preferance is for data from 56 or 58 cm frames.
I'm compiling a database (OK, its a spreadsheet) of vintage and current bike geometries. My interest here is a) to archive as many as possible in a central location and b) to look for groupings of tried and true classic designs.
The spreadsheet is available for download here:
https://home.comcast.net/~pinnah/dirt...kes/bikes.html
For those who are interested in such things, I can see several groupings in the geometry data. Arguably there are 2 more that could be called out...
Modern Road Racing Bikes
-----------------------------------
Chainstays approximately 41.0 cm
Head Angle approximately 73.5 degrees
Fork Offset approximately 4.3 cm
Classic Road Racing Bikes
----------------------------------
Chainstays less than 41.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Event/Audux/Century Bikes
----------------------------------
Chainstays approximately 42.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Modern Sport Touring Bikes
-----------------------------------
Chainstays between 43 cm and 44.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Classic Sport Touring Bikes (My Favorite)
-------------------------------------------------
Chainstays between 43 cm and 44.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 5.5 cm
Loaded Touring Bikes
------------------------------
Chainstays greater than 45 cm
Head Angle approximately 72.5 degrees
Fork Offset approximately 5.2 cm
Could you post frame geometry information for your bikes? Links to catalog scans would also be greatly appreciated.
The information I need are:
Manufacturer, Model, Frame Size (seat tube length), Head Angle, Seat Tube Angle, Fork Offset (rake), Chainstay Length.
Information that would be nice to have are:
(Effective) Top Tube Length, Bottom Bracket Drop, Wheelbase.
My strong preferance is for data from 56 or 58 cm frames.
I'm compiling a database (OK, its a spreadsheet) of vintage and current bike geometries. My interest here is a) to archive as many as possible in a central location and b) to look for groupings of tried and true classic designs.
The spreadsheet is available for download here:
https://home.comcast.net/~pinnah/dirt...kes/bikes.html
For those who are interested in such things, I can see several groupings in the geometry data. Arguably there are 2 more that could be called out...
Modern Road Racing Bikes
-----------------------------------
Chainstays approximately 41.0 cm
Head Angle approximately 73.5 degrees
Fork Offset approximately 4.3 cm
Classic Road Racing Bikes
----------------------------------
Chainstays less than 41.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Event/Audux/Century Bikes
----------------------------------
Chainstays approximately 42.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Modern Sport Touring Bikes
-----------------------------------
Chainstays between 43 cm and 44.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 4.5 cm
Classic Sport Touring Bikes (My Favorite)
-------------------------------------------------
Chainstays between 43 cm and 44.5 cm
Head Angle approximately 73.0 degrees
Fork Offset approximately 5.5 cm
Loaded Touring Bikes
------------------------------
Chainstays greater than 45 cm
Head Angle approximately 72.5 degrees
Fork Offset approximately 5.2 cm
10-05-06 | 08:32 AM
#2
feros ferio
Joined: Jul 2000
Posts: 22,397
Likes: 1,864
From: www.ci.encinitas.ca.us
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
How old is "classic" on your chart? My ca. 1960 Capo frames are 72 degrees parallel, as is the 1970 UO-8.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
10-05-06 | 09:32 AM
#3
Thread Starter
Senior Member
Joined: Mar 2006
Posts: 159
Likes: 0
Bikes: 1979 Trek 510
The oldest data I have is from the 50s (mercian) but realistically the data stops in the 70s. Finding frame info before that is very hard.
Would love to add your frame data. But, really need fork offset (rake) and chainstay lengths
Would love to add your frame data. But, really need fork offset (rake) and chainstay lengths
