"Williams the conquerors of transmission troubles" (long running strap line to advertisements, a pun on William the Conqueror) B 5 pin BCSA type rings D for tandem as prefix of double chainring as suffix e.g. with the sword trademark in the middle and/or stamped Williams (on cranks). Well into the 60’s Williams continued to offered cranks with the original square bolt fitting.Hence, the cranks and cassette bodies are the same, but 11 speed requires new chainrings, sprockets, chain, front and rear gears and Ergopower levers.The chain is narrower and MUST be joined with the UT-CT300 chaintool.Track/pista frames are not included in this registry. A TIPO RONDINE decal may or may not appear on some older Olmo bikes, and refers to the Agrati AM lugs, with 'rondine' meaning 'swallow.' Some older Olmos have the ornate Agrati lugs which Emilio Bozzi sold as Brianza sportiva lugs; the accompanying Agrati rear dropouts are stamped with a scalloped back. Campagnolo crank arms have a date code starting in 1973, consisting of a diamond (1970's) or circle (1980's) with a number in the center denoting the last digit of the year of manufacture, and then in 1985-9 with square and number in the center: 11 = 1985, 21 = 1986, 31 = 1987, 41 = 1988, 51 = 1989 plus some other examples. after the year of an Olmo in this registry designates uncertainty about its year or range of years.Absence of a question mark means there is some certainty about a bike's year or a range of years, established by parts dating, provenance, etc., or by preceding or following dated bikes. Olmo Rondine David Rapley/Racing Bicycles: 100 years of Steel, pp 100-101. Cranks in three options: square, half-round and fluted. Fluted cranks top quality forged right crank one piece. Pre-war special flush fitting cotterpins and dureel fixed sprockets Cranks made in non-gearcase clearance (NGCC) also made in gearcase clearance (GCG) Until 1954 all Williams cranks used the screw square bolt method of attachment (also used by BSA).
The new Centaur 11, Potenza H11 and Chorus, Record and Super Record HO mechanical and HO EPS groupsets have some important differences and specific areas of compatibility that bicycle assemblers and early after-market adopters need to be aware of, which we have not yet had opportunity to transmit to smaller OEMs or CODE dealers / Pro Shops.
Google Books Swallow rondine lugs with seat lug side slot; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends BRAZE-ONS: top tube brake cable ORIGINAL PARTS: 4 speed Campagnolo Cambio Corsa; Campagnolo hubs; Nisi 36 hole rims; Magistroni Senior five pin crankset with 48t chainring; Olmo headset; Brooks B17 saddle; Balilla brakes; Silver blue paint DECALS: decal remnant on top of seat tube; otherwise, none DATING: book author says bike is 1948, from an Olmo team mechanic Serial Number 889 1946-1951? bg.legendary.bikes/e Bay: Seller does not say it is an Olmo in the listing and description; says it has Olmo stickers (bike may not be an Olmo?
); does not have swallow rondine lugs; chrome forks; Campagnolo Cambio Corsa dropouts and fork ends DECALS: head tube and seat tube decals are Olmo 'Lazy L' star logo.
Q: What is the compatibility between 10speed and 11speed?
A: When Campagnolo started down the path of developing 11 speed, they looked at virtually every part of the transmission and redesigned it to cope with the extra demands of 11 speed.