BYOT: Build Your Own Triple
09-14-13, 11:16 AM
#1
Shifting is fun!
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BYOT: Build Your Own Triple
I picked up two bikes today, and both were equipped with what looks like a home-built triple crank set. Anyone seen that before? Experience with it?
09-14-13, 12:26 PM
#2
feros ferio
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That should work, as long as the inner ring is properly centered on the spindle. The only homebrew triples I have ever done used long stack bolts and spacers, which restricted me to the same BCD for all three rings. I was fond of a third-step variation on half-step, such as: 49-46-43/13-16-19-23-26, which gave me 14 usable ratios with an incredibly smooth ratiometric progression.
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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
09-14-13, 12:53 PM
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That should work, as long as the inner ring is properly centered on the spindle. The only homebrew triples I have ever done used long stack bolts and spacers, which restricted me to the same BCD for all three rings. I was fond of a third-step variation on half-step, such as: 49-46-43/13-16-19-23-26, which gave me 14 usable ratios with an incredibly smooth ratiometric progression.
Nifty idea!
09-14-13, 04:25 PM
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I've been meaning to do this for a year now, but haven't yet acquired the proper bolts to affix the little chainwheel, hoping to do a little slicker installation than the ones pictured. Also I have been way too distracted by all the cheap vintage triples I've been picking up from fellow forumites in the FS section.
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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●
09-14-13, 06:26 PM
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Thrifty Bill
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I've posted this one before, but it brings a smile to my face everytime I see the old pics.
Forget a triple, build a QUAD!
My favorite as found modification. Notice the homemade pant/leg guard.
Somewhat incredibly, I still have that crankset, minus the fourth ring, on the bike.
TB
Forget a triple, build a QUAD!
My favorite as found modification. Notice the homemade pant/leg guard.
Somewhat incredibly, I still have that crankset, minus the fourth ring, on the bike.
TB
09-14-13, 07:35 PM
#6
feros ferio
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I am impressed. The only place I had previously seen a quad was on a hand cycle. Finding a long enough crank spindle must have been a challenge.
__________________
"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
09-14-13, 08:12 PM
#7
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Mountain tamer quads were available during the late '80s and early '90s for mountain bikes. Tripilizer chainrings can still be found kicking around. Still, it's kind of interesting to see the home-brewed ones and the garage engineering that made it all possible, so thanks for sharing those pics. 
09-15-13, 12:27 AM
#8
Shifting is fun!
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I like the minimal design of the pant guard. Must have been an engineer who made that.
09-16-13, 12:41 AM
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Seeing those Suginos makes me sad. I love those cranks. Too bad those bolts are probably eating away at the spider's finish.
09-16-13, 01:03 AM
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I have seen several Sugino's with the long stack bolts and spacer type triples. Sugino actually sold a few touring cranks in the 80's that where made this way stock.
09-16-13, 03:23 AM
#12
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Interesting mod, both from the same seller.
And you know you have to treat the crew to a beer when you hit the magic 100 bikes mark before the end of the year, right
?
And you know you have to treat the crew to a beer when you hit the magic 100 bikes mark before the end of the year, right
?
09-16-13, 10:07 AM
#13
feros ferio
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) for awhile, but I didn't like the big gaps on top. Arguably the best way to play to triple-stack game is with a 110mm BCD, something like a 48-45-34/13-15-17-19-21-24. (Been there ... done that on the PKN-10 with a Sugino mountain crank, but since this particular spider already had 110/86 dual BCDs, I used a more conventional 86mm 34T on the inside.)
__________________
"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
09-16-13, 02:50 PM
#14
Shifting is fun!
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09-16-13, 03:29 PM
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feros ferio
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Mountain tamer quads were available during the late '80s and early '90s for mountain bikes. Tripilizer chainrings can still be found kicking around. Still, it's kind of interesting to see the home-brewed ones and the garage engineering that made it all possible, so thanks for sharing those pics.
__________________
"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
09-17-13, 04:46 AM
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Freewheel Medic
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Me too, or at least the FD part!
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Enjoying the GA coast all year long!
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Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
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