Now that’s a BIG chainring !
05-13-19, 02:56 PM
#1
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Thread Starter
Now that’s a BIG chainring !
Saw this on eBay earlier ... A TA crankset with 62/42 chainrings...
whoever was using that wasn’t climbing a lot of steep grades of he was super man .
whoever was using that wasn’t climbing a lot of steep grades of he was super man .
05-13-19, 03:01 PM
#2
Senior Member
Could be it's going on a small-wheeled bike. My 20" recumbent has 39/60 rings on it, and that barely gives a 100" top gear (60x11).
SP
SP
05-13-19, 03:50 PM
#3
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Visitors to Mike Barry's "Bicycle Specialties" shop in Toronto (home of Mariposa Bicycles) would find a TA chainring on display with (if I recall correctly) 130 teeth? As used in a world record attempt.
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
05-13-19, 04:41 PM
#5
Senior Member
i met a dude in SF who was rocking a 60+ chainring. He had some theories around it and the fallacy of high cadences, and I guess he had the legs for it, since he used it in these parts! He stated his love of blazing by people just slowly cranking and seeing their shocked faces (how much anyone actually noticed.... who knows.. but if it helps him ride faster...)
of course, now everyone would just think he was on an electric bike.
of course, now everyone would just think he was on an electric bike.
05-13-19, 04:59 PM
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Visitors to Mike Barry's "Bicycle Specialties" shop in Toronto (home of Mariposa Bicycles) would find a TA chainring on display with (if I recall correctly) 130 teeth? As used in a world record attempt.
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
05-13-19, 05:08 PM
#7
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05-13-19, 05:12 PM
#8
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No, that's a "stayer" or motorpace bike, standard configuration for stability at very high speed. This bike was ridden at 130+ mph in an aerodynamic shroud behind a car.
Mark Petry
Bainbridge Island, WA USA
Mark Petry
Bainbridge Island, WA USA
05-13-19, 05:13 PM
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05-13-19, 05:15 PM
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05-13-19, 06:27 PM
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When living in Clearwater Florida in the 1970's I built a couple single speed bikes to try and ride up US 19 from Clearwater to Manatee springs about 110 miles. I did it a couple of times using very big gears around 58-66 tooth. It is very hard to get going buy once above 20 mph it is easy to keep it up around 30 mph untill the wind comes up. Any head wind and it became almost impossible to make any headway. It is a flat no elevation change. The only hill was the bridge over the Florida Canal near the Florida Power Nuclear station.
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05-13-19, 06:45 PM
#12
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I bought a couple boxes of bike parts a while back. This "ring" was in it. When I first saw it, I thought, wow thats a serious ring; turns out its for a motorcycle.
05-13-19, 08:20 PM
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A world record in... driveway edging? 
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05-13-19, 09:36 PM
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05-14-19, 01:37 AM
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made in New Zealand !
05-14-19, 01:50 AM
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Mine's bigger.
05-14-19, 02:44 AM
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Rode stoker on a tandem with 60x13 gearing BITD. We could spin it out on long downhill runs.
Singles would draft us until we hit a hill then they'd drop us. We'd reel them in on the downside. It was fun looking over my shoulder watching them trying to jump on our wheel.
verktyg
Singles would draft us until we hit a hill then they'd drop us. We'd reel them in on the downside. It was fun looking over my shoulder watching them trying to jump on our wheel.
verktyg
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05-14-19, 08:08 AM
#18
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The Sieger came with an aftermarket 6-bolt 58T outer ring on the old standard 3-piece Simplex 3-to-6-bolt adapters. I kept the 45T inner, but changed to a 49T outer.
I suppose if you limit yourself to a 14T high gear cog, then 58/14 = 112 gear-inches is not all that high by modern 53/11 standards, which I never could understand. For me, a top gear in the mid-90s, such as 49/14 = 94.5 or 50/14 = 46/13 = 96 is plenty, and this lets me have a decently low (lower-to-mid 40s) bottom gear without any serious ratiometric gaps on the way down, even on a 2x6 setup.
I suppose if you limit yourself to a 14T high gear cog, then 58/14 = 112 gear-inches is not all that high by modern 53/11 standards, which I never could understand. For me, a top gear in the mid-90s, such as 49/14 = 94.5 or 50/14 = 46/13 = 96 is plenty, and this lets me have a decently low (lower-to-mid 40s) bottom gear without any serious ratiometric gaps on the way down, even on a 2x6 setup.
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Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
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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
05-14-19, 09:27 AM
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Now I feel foolish agonizing over fitting (and I don't have the choice here of smaller) a 56-ring chainset to my 1987 Mecacycle. I have ridden quite a few 56t rings on classic 1970s British time trial machines and around here, if one picks the route and run carefully, they are astonishingly practical. Although with no front derailleur as was the norm for British tt bikes, not too suitable for street running and traffic signals etc! The key is LONG cranks, too.... 175 or longer. But at speed, it's actually easier pushing a big gear.
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05-14-19, 09:54 AM
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Visitors to Mike Barry's "Bicycle Specialties" shop in Toronto (home of Mariposa Bicycles) would find a TA chainring on display with (if I recall correctly) 130 teeth? As used in a world record attempt.
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
There's a pic of it somewhere. Similar to this one.
Mark Petry
Bainbridge Island, WA USA
Ben
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05-14-19, 10:09 AM
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These go to eleven.
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05-14-19, 09:46 PM
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Alf Letourner and his "Red Devil" Schwinn Paramount:
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05-15-19, 05:53 AM
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drafting speed in now up to 183+ mph by this woman.
https://www.guinnessworldrecords.com...183-mph-541481
I will try for the word slowest one mile this afternoon.
EddyR
https://www.guinnessworldrecords.com...183-mph-541481
I will try for the word slowest one mile this afternoon.
EddyR
Last edited by EddyR; 05-15-19 at 06:21 AM.
