53/39 chainrings on 110BCD crank
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53/39 chainrings on 110BCD crank
Hi peeps -
Are there any issues with using 53/39 chainrings on 110BCD cranks? Specifically, a Quarq D-Zero PM, which supposedly does not require factory calibration if you change chainrings. Reliability, stiffness, whatever.
Thanks!
Are there any issues with using 53/39 chainrings on 110BCD cranks? Specifically, a Quarq D-Zero PM, which supposedly does not require factory calibration if you change chainrings. Reliability, stiffness, whatever.
Thanks!
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Yeah, except Shimano uses crazy expensive 3D big rings to get stiffness at 110BCD.
Use something like BBB, and you'll get mad flex.
Use something like BBB, and you'll get mad flex.
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I believe 53/39 chainrings are available in both 130 and 110 BCD. They are not interchangeable
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Yes, the Shimano four-bolt cranks are all 110BCD, so it's doable. Your DZero (there are two of those in my household, so good taste!), however, has a traditional five-bolt pattern. That's still not an issue, but means you can't use Shimano chainrings for 53/39. I use Rotors on mine, though they're 52/36 Rotor has options in 53/39 for 110BCD. A quick search shows that the options for 110x5 53/39 rings are reducing, though - Praxis and Wickwerks used to make them, but now appear not to. Even Rotor seems to only make them in aero form now.
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Until maybe 5 years ago they were 130. But with the burgeoning popularity of compact cranks almost everyone has now changed to 110. Though Campy, as usual, was still a holdout last time I looked.
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In 2015 Campagnolo came out with a new carbon spider for Super Record, Record and Chorus that accept 53x39, 52x36, and 50x34 tooth rings on the same crank arms.
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Yes, the Shimano four-bolt cranks are all 110BCD, so it's doable. Your DZero (there are two of those in my household, so good taste!), however, has a traditional five-bolt pattern. That's still not an issue, but means you can't use Shimano chainrings for 53/39. I use Rotors on mine, though they're 52/36 Rotor has options in 53/39 for 110BCD. A quick search shows that the options for 110x5 53/39 rings are reducing, though - Praxis and Wickwerks used to make them, but now appear not to. Even Rotor seems to only make them in aero form now.
Figures - my last crank purchase was around then (also a Quarq, funnily enough) and it was a pretty clear 130/110 divide.
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I figured there was a reason they went with 130BCD back in the day for the 53/39s. Do you have suggestions for stiff rings? Rotor aero rings arent a bad idea, actually...
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FWIW, Bradley Wiggins used Osymetric chainrings on his TT bike.
Last edited by noodle soup; 01-31-20 at 09:33 AM.
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What's the skinny on oval chainrings? They were quite the rage a while ago - are they still popular? I was rooting through my spare parts bin and have found a pair of unused Rotor Q-Rings, in 130BCD. Wonder if i should try them on my TT bike.
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I'm saying if you use an aftermarket five bolt 53 ring on a 110 crank, you'll probably realise why 130 is a thing. As for four bolt rings, I'd imagine most companies would make at least a half-arsed effort to emulate the lateral stiffness of Shimano rings; IIRC the BBB ones, although of traditional construction, use these big cosmetic blobs on the nuts that would probably offer a reasonable amount of bracing. I think maybe they did something similar for their replacements for the five bolt 3D rings too.
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Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
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I don't know that 53-tooth 110bcd chainrings can really be noticeably worse than 52-tooth 110bcd chainrings, and those are common (and were prior to the new Shimano 4x110bcd).
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I really like Osymetric rings on a TT bike, but I could never get the front shifting to work as well as standard Shimano rings. On a TT bike it's not an issue, but with a 50t ring on my road bike, it wouldn't allow me to cross chain on short climbs.
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I liked Q-rings, but definitely had shifting issues on them (which is probably largely a setup issue). They felt great, though be aware they'll cause issues for many/ most power meters getting an accurate reading. I don't know that 53-tooth 110bcd chainrings can really be noticeably worse than 52-tooth 110bcd chainrings, and those are common (and were prior to the new Shimano 4x110bcd).
And noted re the accuracy issue. Apparently, it is a 3% error on Quarqs. I'll give it a go on the next TT and see how it goes - if the inaccuracy throws off my pacing, then back come the regular rotors.
I have decided, my next TT/tri bike is going to be SRAM 1x with a 48t and a 10t cog at the back. My 70.3 speeds are around 35-36kph, and that would give me sufficient gearing for any course which i would ride on this bike - any steeper, and it is aerobars on my road bike.
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I have decided, my next TT/tri bike is going to be SRAM 1x with a 48t and a 10t cog at the back. My 70.3 speeds are around 35-36kph, and that would give me sufficient gearing for any course which i would ride on this bike - any steeper, and it is aerobars on my road bike.
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Yup. There's a reason the serious ones will use a 55-tooth - not only does using a larger chainring let you use a physically-larger cog with a looser bend in the chain, it also lets you use a cog one more inboard for a straighter chainline. You'd rather use an 11-2X cassette than a 12-2X cassette for a TT, even if you never use the 11-tooth. And it's not just the 'Twitchers - Froome did that as well, at least some years.
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Even during a TT, at 39-40kph, a 12-13t should be sufficient.
Anyway, this is just early thinking right now... the simplicity appeals to me, and when i get closer to a purchase, i'll probably try to figure out the gearing and see if it makes sense, or even if it is worth losing the flexibility of having a small chainring.
Yup. There's a reason the serious ones will use a 55-tooth - not only does using a larger chainring let you use a physically-larger cog with a looser bend in the chain, it also lets you use a cog one more inboard for a straighter chainline. You'd rather use an 11-2X cassette than a 12-2X cassette for a TT, even if you never use the 11-tooth. And it's not just the 'Twitchers - Froome did that as well, at least some years.
Last edited by guadzilla; 01-19-20 at 10:32 AM.
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Man, that's a level of OCD that i havent descended to. I am not convinced that ceramic bearings, OS RD pulleys, etc make a difference. Besides, I only wish I could be hammering a 48/10. Even during a TT, at 39-40kph, a 12-13t should be sufficient. As for climbs, if I can spin out a 48/10 on a descent, I'd rather push harder on the climbs and use the descent to recover (that's more efficient for overall speed).
Anyway, this is just early thinking right now...
.
Anyway, this is just early thinking right now...
.
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