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What size Big Ring on your double?

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

What size Big Ring on your double?

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Old 02-06-14 | 11:13 AM
  #51  
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I am not concerned about how to swap chainrings
But can I just purchase a 36 ring alone for $X instead of the whole crankset and swapping out what I want to then figure out what to do with the rest?
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Old 02-06-14 | 11:58 AM
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Originally Posted by furiousferret
50/34 and 11-25 Perfect range for the mountains and flats.
Preach on brother! Best gear range IMO. Love the single and max double-tooth spacing on the cogs. 11,12,13,14,15,16,17,19,21,23,25. Mmmmmmmmmmmmmmm yummy......
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Old 02-06-14 | 12:36 PM
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Originally Posted by lennyparis
I am not concerned about how to swap chainrings
But can I just purchase a 36 ring alone for $X instead of the whole crankset and swapping out what I want to then figure out what to do with the rest?
If your crankset is 110mm BCD, then yes. If it's 130mm, then no; 38t is the smallest possible size chainring for 130mm bcd.

Note that if you want to go with a single chain ring, you'll need single stack bolts.
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Old 02-06-14 | 01:04 PM
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Just went to Shimano website only sell Ultegra 6800 as a complete crankset
Nothing for sale for just a single chainring
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Old 02-06-14 | 01:19 PM
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Single ring cranksets: https://www.universalcycles.com/shopp...?category=3981

Including Shimano Alfine, if you want to keep your existing BB, but you'd be limited to 39t.
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Old 02-06-14 | 04:50 PM
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Originally Posted by lennyparis
Just went to Shimano website only sell Ultegra 6800 as a complete crankset
Nothing for sale for just a single chainring
I use this SRAM one without any problems on my 5700 crank
https://www.amazon.com/Truvativ-Force-Rival-110mm-Chainring/dp/B004YWGV76/
Shimano 36T Ultegra level
https://www.amazon.com/Shimano-CX70-10-Speed-Compact-Chainring/dp/B007NA7Z9O/
Edit: missed the 6800 crank

Last edited by redlude97; 02-06-14 at 05:20 PM.
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Old 02-06-14 | 05:07 PM
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Originally Posted by lennyparis
Just went to Shimano website only sell Ultegra 6800 as a complete crankset
Nothing for sale for just a single chainring
6800 and 9000 are going to be one of the few exceptions to what most every one is accustomed to. With those to groups Shimano has once again pulled one of their proprietary moves and gone to a unique 4 point mounting systems instead of using one of the industry standards. Subsequently, to the best of my knowledge, you can't get rings "yet" from aftermarket sources. I'm sure this will change. Furthermore, while Shimano's new mounting sytem allows the use of everything from 34/50 to 42/54+ on one crank, they (shimano) are only selling rings in matched pairs. Apparently they've designed each set to work together for best results and subsequenlty claim that mixing and matching would result in recuded shifting performance. I'm completely unaware of how much shaping or sculpting of the inner rings they've performed. It seems hard to believe it would be much, except in the case of triples.

Anyhow, for now, if running 6800 or 9000 you're stuck with buying pairs of rings from Shimano in 50-34T/52-36T/52-38T/53-39T/54-42T/55-42T and 46/36T. Mix and match at your own risk.
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Old 02-06-14 | 05:36 PM
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50/34 as well, with 11-26 on the back
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Old 02-06-14 | 05:45 PM
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Originally Posted by dvdslw
Praxis doesn't offer a 50T in a 130 bcd but shimano does.
As does FSA and likely others as well.
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Old 02-06-14 | 09:16 PM
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Originally Posted by bigfred
6800 and 9000 are going to be one of the few exceptions to what most every one is accustomed to. With those to groups Shimano has once again pulled one of their proprietary moves and gone to a unique 4 point mounting systems instead of using one of the industry standards. Subsequently, to the best of my knowledge, you can't get rings "yet" from aftermarket sources. I'm sure this will change. Furthermore, while Shimano's new mounting sytem allows the use of everything from 34/50 to 42/54+ on one crank, they (shimano) are only selling rings in matched pairs. Apparently they've designed each set to work together for best results and subsequenlty claim that mixing and matching would result in recuded shifting performance. I'm completely unaware of how much shaping or sculpting of the inner rings they've performed. It seems hard to believe it would be much, except in the case of triples.

Anyhow, for now, if running 6800 or 9000 you're stuck with buying pairs of rings from Shimano in 50-34T/52-36T/52-38T/53-39T/54-42T/55-42T and 46/36T. Mix and match at your own risk.
Rotor QXL is available.

Edit: And regular Q-rings.

https://www.cart32hostingred.com/cgi-...atid=262868100

Last edited by Bah Humbug; 02-06-14 at 09:23 PM.
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Old 02-06-14 | 09:21 PM
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Originally Posted by Bah Humbug
Rotor QXL is available.
There you go, if ovoids float your boat. It looks like only in a 38/53 so far. But, it won't take long for the other aftermarket manufacturers to produce more options.
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Old 02-06-14 | 09:27 PM
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Originally Posted by bigfred
There you go, if ovoids float your boat. It looks like only in a 38/53 so far. But, it won't take long for the other aftermarket manufacturers to produce more options.
Right, I certainly know ovals aren't for everyone (I love them), but I was excited when I saw it on the Rotor site because it means, as you said, that others will be along, and I love the idea of not needing to choose a BCD to commit to.
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Old 02-07-14 | 10:10 AM
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Currently, road doubles on the chainsets (53/39's) and 14-28 on the freewheels. The granny gear is like Jezebel on a couple of the hills in our hilly area.

Would a compact 50/34 and 11-28 7sp help with the steeper hills? I want to get away from the mashing and run a higher cadence to help with endurance factor.
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Old 02-07-14 | 03:23 PM
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50/34, 11-25 10 speed on one bike,

50/34, 11-25 11 speed on the other. <------Best all-around combo I can possibly think of. Makes the 11 speed money worth it right there.
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Old 02-07-14 | 03:28 PM
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Originally Posted by OldsCOOL
Currently, road doubles on the chainsets (53/39's) and 14-28 on the freewheels. The granny gear is like Jezebel on a couple of the hills in our hilly area.

Would a compact 50/34 and 11-28 7sp help with the steeper hills? I want to get away from the mashing and run a higher cadence to help with endurance factor.
34/28 is 8.5 mph pedaling at 90 RPM. Can you sustain 8-9 mph on the hills you ride?
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Old 02-07-14 | 03:37 PM
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Originally Posted by kv501
34/28 is 8.5 mph pedaling at 90 RPM. Can you sustain 8-9 mph on the hills you ride?
Perfect! The road double 14-28 had me mashing a tough less than 60 rpm (as a guess) and with the extra anaerobic/slow-twitch in full effect I'd get pretty worn at the top. I'm training hard these hills but wouldnt mind a bit more cadence to ease the knees. Thanx!
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Old 02-07-14 | 07:37 PM
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2 road bikes with a 53 Dura-Ace
1 road bike with a compact 50 Ultegra
1 TT bike with a 55 VisionTech carbon
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