#91
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Jan Heine on why 48/33 is superior to 48/32: https://janheine.wordpress.com/2019/...-herse-cranks/.
"Why the 15-tooth step between chainrings rather than the more common 16-tooth? To understand why a 48/32 doesn’t work well, let’s look at how ramped-and-pinned chainrings work..."
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It don't mean a thing, if it ain't got that certain je ne sais quoi. --Peter Schickele |
#92
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#93
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#94
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Why would it be more difficult to do 32 rings than 33 rings tho
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#95
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Chisholm's Custom Wheels Qui Si Parla Campagnolo Last edited by oldpotatoe; 04-05-2019 at 07:23 AM. |
#96
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"For this five-bolt crank and its 110mm spider Praxis has come up with a clever fourth way: dispense with the chainring nut and screw the bolt straight into the inner ring. That provides the necessary couple of millimetres of extra space needed for a 32-tooth ring. The hole in the inner ring is very close to the bottom of a trough between teeth, though, so you can’t go smaller with this trick. And you probably can’t just put the Praxis rings on a 110mm five-arm chainset that you happen to have spare. To make room for the chain on the 32-tooth ring, Praxis has machined a shoulder into the arm of the crank; without it, the chain will almost certainly hit the spider arm and skip." |
#97
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I have not read the article about the 33/48 combo. I can say that I have been running 33/46 with an 11-32 cassette for 3 years now and I like it very much.
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please don't take anything I say personally, I am an idiot. |
#98
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Correct me if I am wrong, but I thought there was proven reduced efficiency with smaller rear cogs <13 teeth?
And I agree that the whole Ergo evolution--8 speed forward was brilliant and not "losing their way"--precise, well built, excellent brakes (especially the matched dual pivots)--and the high point was perhaps 2004-2006-ish. Then some craziness ensued--UltraTorque, wait, no Powertorque--oh wait Centaur will be the first, no it's the second, Ultrashift--oh, no dumping on cheap groups, some pretty bad finishing on cheaper groups, too many "standards" and the drying up of even the basic parts. I could still probably source a NOS brake lever blades for Campy Record or Nuovo Record from the '70s/80s--but I can't get the same for Record 10 carbon 10 years later? Couldn't they have made a ****load of generic carbon levers with no group markings? |
#99
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It's just that the ramped version of their 48-tooth outer chainring is designed for pairing with a 33T inner. |
#100
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Chisholm's Custom Wheels Qui Si Parla Campagnolo |
#101
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Fair enough, I didn't read that closely, but the point stands - other manufacturers have figured out how to make the the 48-32 gap shift fine.
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#102
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Other than the fear factor, it's a really nice spread, the 48t is the sweet spot for rolling terrain. Shifts as well as my 11sp Ultegra compact. Shimano CX-70 front derailleur works great for Shimano 11sp and has a sized-down cage for smaller sub-compact rings with no long arm to interfere with large tires. |
#103
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Supposedly Chorus 12 speed will be available early-mid May, according to someone over on the Weight Weenies forum.
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#104
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i want |
#105
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Still under embargo, but the RRP is close to Ultegra RRP from what someone on the internet told another 14yr old
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