49/45 crankset
02-27-21, 11:58 AM
#1
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49/45 crankset
I have a 52/45 Stronglight 93 but unfortunately 4 or 5 teeth of the 52 met the asphalt at some point in their life and shortened them anywhere from 20 to 50% of their original height. It seemed to work fine but I dont really feel good about having a damaged chainring like that.
I have a 49T outer chainring to put on but I'm wondering if anyone has run a similar combo of 49/45 chainrings and how they felt about it. Seems like a three fifth step crankset instead of the half step.
I have a 49T outer chainring to put on but I'm wondering if anyone has run a similar combo of 49/45 chainrings and how they felt about it. Seems like a three fifth step crankset instead of the half step.
Last edited by Narhay; 02-27-21 at 12:01 PM.
02-27-21, 12:13 PM
#2
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A 49 outer is quite nice, as long as top speed is not an issue. I like it. Combines nicely with a 14-28 FW. But with a smaller inner, like a 36, such as on this bike:
There's a 37T available for the Stronglight 93. I'd get that.
There's a 37T available for the Stronglight 93. I'd get that.
02-27-21, 03:12 PM
#3
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I've been running 48/40 with 14-24 for the last year or so and really like it. I'm able to use big ring/small cog combinations more often and I have more options in the midrange too. I don't find myself spun out on a descent often enough to mind the reduced top end.
Last edited by Fahrenheit531; 02-27-21 at 03:15 PM.
02-27-21, 04:37 PM
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Looking at the gear calculators is fun. You will then have a better idea.
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02-27-21, 06:51 PM
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I run a 48-42-28 triple on one of my bikes.
02-27-21, 10:40 PM
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They work rather nicely.
With a 13-28 7 speed it gives a nice half-step from 105 to 48 GI.
I have a 3x10 with a 49x46x34 and it works well as a half step +.with a 11x36 cassette.
here it shows as a 50 but is now a 49 and looks similar
I had to trim the inner side of the FD to fit over the 46, modern 3 speed Front derailleurs are too thick in height.
I have also used a 48x45 with a 2x9 12-36 cassette on my Zunow
With a 13-28 7 speed it gives a nice half-step from 105 to 48 GI.
I have a 3x10 with a 49x46x34 and it works well as a half step +.with a 11x36 cassette.
here it shows as a 50 but is now a 49 and looks similar
I had to trim the inner side of the FD to fit over the 46, modern 3 speed Front derailleurs are too thick in height.
I have also used a 48x45 with a 2x9 12-36 cassette on my Zunow
02-28-21, 03:23 PM
#7
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Absolutely positively yes!
I have run 50-47 / 14-16-18-20-23 -- near-perfect half-step for flat rides. I swapped in a 42 for a nice 1.5-step for hill work. It works even better with a 6-speed 14-16-18-20-23-26, which is what I currently have on the Bianchi.
I am strongly considering 49-45 / 14-17-20-24-28 for the "mostly original" Sieger, which is keeping its original Agrati cottered steel crankset and Simplex 3-to-6 bolt 3-piece adapter, which has a lower limit of 45T. If I can't get the Campag. Gran Sport to clear 28T, I am inclined to go 49-46 / 14-16-18-20-23-26 if the GS will handle 6 speeds, or maybe 49-45 / 14-17-20-24-26, since I don't do large-large crosschaining anyway.
The Peugeot has 45-42 / 13-15-17-20-23-26.
The Capo Modell Campagnolo has 46-38 / 13-15-17-19-22-25, which makes a nice 1.5-step with about the same 96-inch top gear as 50/14.
I have run 50-47 / 14-16-18-20-23 -- near-perfect half-step for flat rides. I swapped in a 42 for a nice 1.5-step for hill work. It works even better with a 6-speed 14-16-18-20-23-26, which is what I currently have on the Bianchi.
I am strongly considering 49-45 / 14-17-20-24-28 for the "mostly original" Sieger, which is keeping its original Agrati cottered steel crankset and Simplex 3-to-6 bolt 3-piece adapter, which has a lower limit of 45T. If I can't get the Campag. Gran Sport to clear 28T, I am inclined to go 49-46 / 14-16-18-20-23-26 if the GS will handle 6 speeds, or maybe 49-45 / 14-17-20-24-26, since I don't do large-large crosschaining anyway.
The Peugeot has 45-42 / 13-15-17-20-23-26.
The Capo Modell Campagnolo has 46-38 / 13-15-17-19-22-25, which makes a nice 1.5-step with about the same 96-inch top gear as 50/14.
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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
02-28-21, 07:12 PM
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49-45 will shift fast and sure. Play with the calculater and then go to IRD and make up a FW.
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