Shimano 1x road clutch derailleur - aprils fools joke Shimano 2x road clutch derailleur - not a joke, real product
Ultegra RX: Medium cage, officially compatible with 11-28 to 11-34 cassette Sram Force 1: Long cage 11-32 to 10-42 / Medium cage 11-26 to 11-36 / Short cage 11-26 to 11-28
\nSo if you really want a clutch derailleur fo a gravel bike what’s wrong with a mtb derailleur? I know you can’t really get the integrated shifters working but 95% if the time it doesn’t even bother me. I used a PAUL
\nadapter to get the trigger shifter up near the stem on my drop bars.
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\nAlso I reasoned that being a gravel/all-road bike that I would be putting it through some rough and dirty conditions regularly.. I figured a mtb derailleur would be more resilient and dependable.
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\nI guess if you’re running 2x then having 2 trigger shiters on the tops of the bars would be unappealing.
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Wolftooth Tanpan allows using mtb rear mechs with integrated shifters. I've got nearly 6000 miles on mine and am very satisfied with it. I'm running and 44x30 crank, 11-40 11 speed with Shimano 105 11-speed brifters.
kklasman wrote:Wolftooth Tanpan allows using mtb rear mechs with integrated shifters. I've got nearly 6000 miles on mine and am very satisfied with it. I'm running and 44x30 crank, 11-40 11 speed with Shimano 105 11-speed brifters.
Which rear mech are you running? Thanks for the info.
Shimano RD-M8000-GS.
I am outside of the recommended limits, and shifting the chaingring isn't perfect all the time, but it gets me the gear ratios I want so I'm satisfied. I probably should play with the clutch tension to see if that helps...I run it with the clutch off, as it's too stiff with it on.
I can agree with many comments under this article about remote clutch switcher like mechanical and electronic switches (di2 Float iCD) for mtb suspension
I am new to the clutch derailleur thing, so I apologize in advance for remedial questions, but I am interested in learning.
So, I don't really understand. In a race like Paris-Roubaix, is the clutch engaged for the whole race, or do you manually adjust it for the cobbled sections? Switch at half? I would think the loss of drive train efficacy will kill any gains. Seems like pros are all about efficiency, larger jockey wheels, ceramic bearings, etc... Dropped chains seem relatively rare. I raced a Ultegra equipped bike for cyclocross and don't think I dropped the chain once. Sure, there is some bouncing and chain slap, but oh well.
I like this as a possible replacement to my eTap wifli : https://bike.shimano.com/en-US/product/component/ultegra-r8050-di2/RD-R8050-GS.html What isn't specified is the total capacity of the new clutch derailleur. For example, my current eTap set up for gravel is a 46/36 CX 2x chainring and an 11-36 cassette. This setup requires a rear der with (46-36)+(36-11)= 10+25= 35 teeth. This exceeds the spec. on the wifli rear der. I make work by using a longer chain to accommodate the 46/36 front/rear combination; and adjusting the b-screw for adequate pulley clearance. But, the extra chain slack when running higher gears, does effect the shifting of the system. It works, but there is a noticeable delay in the shifting. What I really want to run for gravel is a 46/30 chainring set, with an 11-32, or even an 11-36. To do this the rear der. needs a minimum capacity 37 teeth for the 11-32, or for the 11-36 cassette, a capacity of 41 teeth. Does anyone know the maximum capacity of the new Ultegra medium cage "Shadow" der?
@bobknh The current gen Ultegra mid-cage rear derailleur has a total capacity of 39T. I'd expect this one to be able to be the same. Even the short-cage derailleur has 35T capacity.
@alembical They said the clutch in this derailleur costs 1W. I don't know how much a flailing chain costs but wouldn't be surprised if it's as much or more.
bobknh wrote: I like this as a possible replacement to my eTap wifli : https://bike.shimano.com/en-US/product/component/ultegra-r8050-di2/RD-R8050-GS.html What isn't specified is the total capacity of the new clutch derailleur. For example, my current eTap set up for gravel is a 46/36 CX 2x chainring and an 11-36 cassette. This setup requires a rear der with (46-36)+(36-11)= 10+25= 35 teeth. This exceeds the spec. on the wifli rear der. I make work by using a longer chain to accommodate the 46/36 front/rear combination; and adjusting the b-screw for adequate pulley clearance. But, the extra chain slack when running higher gears, does effect the shifting of the system. It works, but there is a noticeable delay in the shifting. What I really want to run for gravel is a 46/30 chainring set, with an 11-32, or even an 11-36. To do this the rear der. needs a minimum capacity 37 teeth for the 11-32, or for the 11-36 cassette, a capacity of 41 teeth. Does anyone know the maximum capacity of the new Ultegra medium cage "Shadow" der?
I dug a little deeper on the Shimano web site. Although the exact capacity of the medium cage version isn't stated, the medium cage der. can run an 11-34 cassette, with a 16T chain ring difference. This means that the rear der. capacity is at least 39T. I also learned that the rear der. has an off/on switch which allows you to reduce or increase the spring tension depending on the gear set you are using --- lower tension for easier shifting with less demanding gear sets for normal pavement; higher tension for more demanding gearing for unpaved riding. Very nice! For me, the 11-34, with 46/30 chainrings would be nearly perfect for the kind of riding I do. Now, I'm waiting for Shimano to come out with a 46/30 road/gravel Hollow Tech crankset to complete my fantasy Di2 gear set!
