Chainrings for a climbing clyde
#26
Senior Member
In the distant past, like 4 years ago, your only options for wide-range gearing from Shimano were an 11-27 or 12-27 cassette combined with either a 53/39 or 50/34 crank. People who wanted to climb often chose the knee-friendly 50/34 and 11-27 giving a gear range from 34.0 to 122.7 gear-inches. The 53/39 + 11-27 gives you a range of 39.0 to 130.1 gear inches, BTW.
Then somebody at Shimano ran the numbers and figured out that if you combined a 52/36 crank with an 11-28 cassette you'd end up with almost the same gearing as a compact: 34.7 to 127.6 gear-inches. As you can see, the 52/36 is a nice compromise between the 50/34 and 53/39: you still have the same low gearing for climbing, but a bit more top-end for hammering along the flats in a pace-line. Plus, your buddies who haven't run a gear calculator will still think you're a stud since you've got a 52-tooth chainring
#27
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Interesting. I'm sticking a set of praxis rings on my want list. Probably 50/34, since I don't want to replace those and the cassette JUST yet.
#28
SuperGimp
It really depends on how fast you're going and what cadence you choose to maintain. 16 mph or so is the cutoff for me (I think, I don't really have a cutoff but unless it's hilly or windy, I'm on the 50 ring for the most part) Slower than that and you can get along just fine in the 34 ring.
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It really depends on how fast you're going and what cadence you choose to maintain. 16 mph or so is the cutoff for me (I think, I don't really have a cutoff but unless it's hilly or windy, I'm on the 50 ring for the most part) Slower than that and you can get along just fine in the 34 ring.
#30
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I ride a 48-34 with a 12-28. It is plenty except fr some short steep off road. 230 lbs and a built up older steel frame. It's sweet and I can climb anything on road I've run into. I'm in the 48 on everything but hills on road. Stay in the 34 off road.
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#31
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Yeah. 50-34 with good rings (Praxis) might be the way I go. It's not terribly expensive, and I am running into both the top of my gearing (albeit on longer, if shallow, downhills) and the bottom (though I still CAN make it up the hills I've ridden, but those don't go much over 9%, and not for very long).