Downloads in Excel & PDF
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EXCEL DOWNLOADS
Of course you need a spreadsheet program like MS Excel to use the Excel app's; you can choose the free OpenOffice, or browser based like Google Spreadsheets (also for Adroid) , and through the Apple iTunes store, the MS Office app for iPads and iPhones.For PDF's you can use Adobe Reader, but there are many free readers around.
Gearcharts-metric : is a calculation of the development, the distance covered by one crank rotation, with all possible gearing systems.
Gearratioenglish : is an old way to express the gearratio in inches, for all hubs, brackets and all possible gearing systems.
FitbikeApp : is a bike-fitting program to compare the sizes of body and bike, and to calculate a good seating position.
PDF DOWNLOADS
SALES CATALOGS OF RETAILERS FROM 1900 TILL 1990
They show what bikeparts were available in that era.
Here are a lot of old catalogs from retailers offering their goodies, way back since the early 20th century. They are from many countries and written in many languages. These catalogs can be fairly large, that is why I reduced some, by leaving out less interesting pages; these files are labelled Select. After 1960 most of these firms were active in the racing bike scene. Till the seventies we see mostly drawings, then the pictures take over.
Engllsh Italian French German
French (English firm) Italian English (Canada) French
German German English Swedish
. English Italian English English
Italian English English English
English English German American
American American English Dutch
PDF catalogs Shimano (english)
MORE...
PDF 's of books before 1900 can be found on this page
They paint a clear picture of the technical developments between 1870 and 1900.
Other sites with lots of info on the W.W.W.
Gary Burgess: aluminium bikeparts from ‘50s- ‘80s (1 file) ; Accles & Pollock English Chromium - Molybdene steel tubes from ‘1900s-’50s (just adverts)
Halford 1955 catalogue (1 file) ; Maillard around 1980: (1 file) ;
Raleigh: (dozens) ; and more , Raleigh + SBDU (hundreds) ; Sturmey Archer 1903- 1990 (hundreds) ; very nice is the 1957 Master-catalogue
An American framebuilder who gathered lots of info Bike Pictures on bulgier.net (hundreds).
Bobby Sapovits collected these: https://www.equusbicycle.com/bike/index.html
Deraileurs, hundreds of them : disraeligears
Mainly English bikes and parts: Catalogues & Manuals - Three Speed Hub
Great knowledge trove: https://www.retrobike.co.uk/
Bikes from nothern Italy https://www.frameteller.it/cataloghi/
Emilio Bozzi owned the brands Legnano, Wolsit, Frejus