anyone got 12 spd gx eagle on their emtb ?

[nobbyq]

or is the 11 spd 11-42t the norm and enough ?

 

[highpeakrider]

I had eagle on my whyte 130, got 10 speed on the ebike, I dont think you need the gearing or high cost rear mech of eagle.

 

[dirt huffer]

I shied away from 12 speed due to the cassette replacement cost.

11-42t should be *enough* for people but if you have the money, the added gear of 12 speed is just a bonus. Oh and 12 speed oil slick chains and cassettes look p.i.m.p.

 

[DrChris]

I've currently got 12sp Eagle (NX) but will definitely be dropping back to 10sp with 42t. The main reason for me is the long length of the derailleur cage of the Eagle getting snagged all the time. A medium cage GX derailleur (with roller clutch) should help with that.

 

[StevenM]

Yes

11-50 / 12 speed on the Giant Trance E+1

 

[valium64]

With the eMTB I normally use reduced assistances when possible and keep an agile pedaling very similar if not equal to when I use the MTB, my Sam2 had an XT 11v with 11-46 that I replaced because of problems with a group Sunrace 12v 11-50 and I must say that in ECO above the 20% gradient you still climb agile even with a reduce ECO at a similar speed of a standard MTB.

 

[steve_sordy]

I loved my Eagle 12-speed on my Whyte T130C RS clockwork bike, but I'm not sure I'd opt for it on an emtb. Firstly, the pedal assist on the emtb makes the wide range gearing redundant. Secondly, the narrow gaps between the gears makes accurate set up critical for smooth shifting. I didn't notice this requirement with an 11-speed clockwork bike or my emtb.

 

[Ivan]

Unless you need the the 500% range or the 50t cog, then I would avoid going 12sp on your emtb.


12sp has some negatives:
Extra unsprung weight due to the big cassettes
Expensive components
Weaker chains
Tuning tolerances are smaller.

I have 12sp eagle on my Trek Remedy, and like it, but I don't think I would want it on my eMTB.

 

[steve_sordy]

?

please clarify what you mean. as far as I know, youre using the same hub and same chainring as in an analog bike. you set the a and b limit screws, then tweak the barrell adjuster on the shifter. how exactly is this setup more critical for smooth shifting?

sounds like a made up problem.

It is nothing to do with analogue vs ebike. If you are squeezing more and more gears into the same space, then the shifting has to be progressively more accurate unless you go for wider and wider hubs. The systems tolerance for error is reduced and you start getting sundry shifting problems that are not fixed by the usual trail side methods. All I can do is to point to my own experience. I rode bikes for years and years and never needed a mech hanger alignment by me or the bike shop (not that they ever told me anyway). Unless something actually broke, I was always able to sort out any shifting problems, by the trail side if necessary with what I carried in my pack. When I got a bike with 12-speed, I had to have the mech hanger aligned twice by the bike shop within a few months. Then I bought my own alignment tool and had to do it twice more in the next year.

I would happily have 12-speed again on an analogue bike as I like it. It gives me a wide range with good steps and the shifting is nice and clean. I am prepared (and now able) to deal with any alignment requirements, but I do not believe that I would ever need 12-speed on an emtb. (I hope that I never have to eat my words on that, as it will mean I have some serious problems).

 

[Al Boneta]

I have setup bikes for customer’s bikes with Eagle.
This was against my advice, but riders who are more hung up on status and ego like to spend money.
On the upside I have sold one guy 3 XX1 Eagle cassettes and 8 chains in 5 months.
If you can’t climb a hill with an 10-42 and a motor... well
I run a 9-speed on my Kenevo and just got 12-speed AXS for my Stumpy EVO so I can do barspins.
My 9-speed Box cassette is geared so low that I never use the three lowest gears, but they are coming out with 11-42

 

[iXi]

I currently have an NX system, once the cassette dies I'll look to changing over to something cheaper. What is a good recommendation for all round dollars to quality

 

[Ivan]

12sp tolerances are smaller than 11sp due to the fact that more gears have been squeezed into what is near enough the same space, and it is easier for small changes to cable tension to cause it to drift out of tune. B screw setup is also more important on the bigger cassettes. The same is true for 11sp when compared to 10sp (and so on). This is is widely reported and matches my experience going form 8sp-9sp-10sp-11sp-12sp.

Its not something people are going to cry about, but it is certainly not a positive of the system. Would it put me off buying 12sp on a normal mtb? No because I value the wide range more than the negatives, but on a motor assisted bike I don't think the range is necessary.

 

[steve_sordy]

any derrailler you smash against against a mountainside or log, is going to require calibration no matter how many speeds it has.

sounds to me like you were repeatedly smashing your derrailers in your local trails.


if this was such a big issue, everyone with 12 speed would be crying about it everywhere but this is not the case.

happy trails my dude.

I agree with your first sentence, difficult to disagree really.
It is the second sentence that I disagree with. If the mech was receiving a knock hard enough to bend the hanger, then there would have been some sign of it on the mech. However I accept that it is possible that a nudge against a rotten log might knock it off course without leaving a mark. But where I ride and how I ride hasn't changed much in recent years, if anything I have been getting less adventurous in recent years. So why was I having more problems with 12-speed shifting that required the mech hanger to be re-aligned than I ever did with 9, 10, or 11-speed? I repeat my proposal that it is to do with the increased precision that the 12-speed set up requires for trouble-free shifting. Slight misalignment that would not cause a problem with lower speed gears appears to do so with 12-speed. Unless they bring out even wider hubs, I doubt that the industry will go above 12-speed for derailleur gears.

Oh and I haven't been crying about it anywhere, not even on here. I said in my first post (#9) that I loved the 12-speed on my clockwork bike. I gave two reasons why I would not fit it on a emtb. I only mentioned the mech hanger realignment (#13) when you asked me to expand upon my statement about the need for extra precision and you said it was a made up problem.

 

[steve_sordy]

we're talking about turning a barrell adjuster with your finger. its the same as in any other bike, electric or not, 9, 10, 11 or 12 speed.

Yes, I get the theory. I know what to do, been doing it for years. But when that doesn't give you satisfactory shifting when on the trail, nor anything else either - what do you do? The answer was to use a mech hanger alignment tool. I had never needed an alignment before, ever. Changing the cables, tensioning them properly, turning the barrel adjuster and occasionally the limit screws or the B screw all did the trick. Not with the 12-speed, it needed the mech arm aligning for that final bit of adjustment that made all the difference.

You disliked the chain rubbing on the chain catcher to the extent that you got rid of your 12-speed set up.
I dislike shifting that isn't spot on and refused to put up with it. I found out what the problem was with my 12-speed and fixed it. Not all shifting problems can be fixed with just the barrel adjuster.

I was surprised to find that alignment tools are readily available for sale, so I guess that there must be a demand for them. Who would have thought?

 

[steve_sordy]

Sound move!