What threading is this Bottom Bracket?
03-02-17 | 12:51 AM
#2
Senior Member
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From: NE Florida
Bikes: '84 Lotus Supreme, '85 Club Fuji, '86 Schwinn Peloton, '87 DS Ironman Expert, '87 Maruishi Professional, '88 Takara
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"If there hadn't been women we'd still be squatting in a cave eating raw meat, because we made civilization in order to impress our girl friends. And they tolerated it and let us go ahead and play with our toys." Orson Welles
"If there hadn't been women we'd still be squatting in a cave eating raw meat, because we made civilization in order to impress our girl friends. And they tolerated it and let us go ahead and play with our toys." Orson Welles
03-02-17 | 08:25 AM
#3
Old fart
Joined: Nov 2004
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From: Appleton WI
Bikes: Several, mostly not name brands.
Metric thread. There's no clear picture of the markings on your fixed cup, so I can't distinguish between "French" and "Swiss."
French, if the fixed cup is right-hand thread. Swiss, if the fixed cup is left-hand thread.
French, if the fixed cup is right-hand thread. Swiss, if the fixed cup is left-hand thread.
03-02-17 | 09:02 AM
#4
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It's French threading. Shimano didn't catalogue Swiss fixed cups in 1984. 35 x P1 is the standard Japanese marking for French thread. Japanese manufactured Swiss fixed cups, when you can find them, are typically marked 35 x P1 S1.
Last edited by T-Mar; 03-02-17 at 09:10 AM. Reason: added image
03-02-17 | 10:07 AM
#5
feros ferio
Joined: Jul 2000
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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;
Thanks, as always, T-Mar. I have never seen a Japanese manufactured Swiss fixed cup -- I always wondered whether they ever existed.
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"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
03-02-17 | 10:46 AM
#6
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From: Baltimore MD
Bikes: '72 Motobecane Grand Record, '72 Gitane tandem, '72 Raleigh Super Course, '73 Raleigh Gran Sport, '73 Colnago Super, '76 Fiorelli Coppi, '78 Raleigh SBDU Team Pro, '78 Trek 930, '81 Holdsworth Special 650B, '86 Masi GC, ’94 Bridgestone RB-T
Strange coincidence - I just yesterday tried to pull the fixed cup on a 1980 Motobecane Grand Touring. It is indeed a Japanese Swiss-threaded BB. I will check the markings tonight. I know it says 35xP1, but I don't remember seeing the S1 marking.
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02-06-22 | 07:50 PM
#8
Thrifty Bill
Joined: Jan 2008
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From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Waking this thread up briefly to add some pictures of Tange bottom bracket cups, Swiss threaded. As mentioned earlier by T-Mar, they have the 35xP1 threading marked, a shared size between French and Swiss bottom brackets.
These have the "SI" marking, and sure enough the drive side was Swiss threaded.
Came off a 1976 Motobecane, Nomade Sprint. Motobecanes are my go to choice for French and Swiss sized parts. SR forged french stem, Motobecane french headset, Suntour barcon shifters (not stock on the Nomade Sprint but a pleasant surprise), and a nice V GT Luxe rear derailleur. Meanwhile, their french competitors were using plastic derailleurs and shift levers, death stems, and more.
IME, when it comes to Swiss bottom brackets, while many of the french bike makers did a short splash with them, Motobecane LOVED them. I've found them on Motobecanes from 1976 to 1982.
Note the "SI" marking is much smaller lettering than the rest of the markings.
Both fixed cup and adjustable cup have the "S1" marking, along with 35 x P1.
These have the "SI" marking, and sure enough the drive side was Swiss threaded.
Came off a 1976 Motobecane, Nomade Sprint. Motobecanes are my go to choice for French and Swiss sized parts. SR forged french stem, Motobecane french headset, Suntour barcon shifters (not stock on the Nomade Sprint but a pleasant surprise), and a nice V GT Luxe rear derailleur. Meanwhile, their french competitors were using plastic derailleurs and shift levers, death stems, and more.
IME, when it comes to Swiss bottom brackets, while many of the french bike makers did a short splash with them, Motobecane LOVED them. I've found them on Motobecanes from 1976 to 1982.
Note the "SI" marking is much smaller lettering than the rest of the markings.
Both fixed cup and adjustable cup have the "S1" marking, along with 35 x P1.
Last edited by wrk101; 02-07-22 at 09:26 AM.
02-06-22 | 08:07 PM
#9
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From: Toledo Ohio
Bikes: 1964 Huffy Sportsman, 1972 Fuji Newest, 1973 Schwinn Super Sport (3), 1982 Trek 412, 1983 Trek 700, 1989 Miyata 1000LT, 1991 Bianchi Boardwalk, plus others
76 moto
My stationary bike setup is a 76 moto super mirage that came with the Tange Swiss thread. My first with this. The s was very small on the markings. Mine was trashed, but luckily my co-op had exactly 1 set.
Last edited by sd5782; 02-06-22 at 08:11 PM.
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