Rotor Aldhu

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Dwayne
Posts: 46
Joined: Mon Feb 17, 2020 9:00 am

by Dwayne

13,300 km on my NGeco P2M Edition set of Rotor cranks. Only problem I had was the left crank coming loose twice. Put a bit of loctite on the bolt, and it's been fine since, but I think I'd prefer a pinch-bolt setup like Shimano has. The lockring with the tiny 2mm allen screw is a bit fiddly, too. Aside from those little things, no problems (78-80kg and 335 FTP, just for data point sakes, so I do put a decent load on the stuff).

fizzaz
Posts: 274
Joined: Wed Nov 07, 2018 5:02 pm

by fizzaz

yinya wrote:
Sat Apr 17, 2021 6:27 am
You guys removed the plastic film from the Aldhu carbon cranks, right? It was a little more sticky than usual, so I became in doubt if it was intended to be left on?


Sent from my iPhone using Tapatalk
This was supposed to be left on.

by Weenie


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moonoi
Posts: 663
Joined: Sat Nov 21, 2015 3:04 pm
Location: Earth

by moonoi

tleo wrote:I've got about 8000km on my 24mm NGeco/Aldhu road cranks and no issues. But I can generate only about 700 Watts in a sprint on a good day. I don't recall seeing any failures like this on any of the forums I visit so hopefully this is a one off failure.
According to the P2M I was only putting out 360w when it failed! I believe it is a one of failure, since both Rotor and P2M told me they’ve never seen a failure like this before.

Very happy with how responsive they’ve been regarding this, just have to wait for the replacement to arrive and hopefully never see this issue again.

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LouisN
Posts: 3508
Joined: Mon Feb 19, 2007 3:44 am
Location: Canada

by LouisN

I'm trying to find wich chainrings combo are lighter and what are the weight differences between the following:
1)The 52/36 direct mount combo, or 2) the Rotor spider + both 52 and 36T chainrings + bolts.
Anybody had those combos weighed ?

:beerchug:

Louis :)

Konstantin
Posts: 5
Joined: Tue Apr 06, 2021 3:50 pm

by Konstantin

nottyfruit wrote:
Tue Jun 30, 2020 12:50 pm
Hi Lewolive,
i'm a bit confused, you have the Rotor Aldhu 3d+ crankset with axle weighed in at 564g, every other website that i looked at have the crankset listed as more than 630g depending on crank arm length and spidering combo.
How did you get your's to be so light? Curious because i'm considering buying 165mm and 46/30 combination. Would you happen to have that weigt with PF30a axle? Intend to use it for the Cannondale Supersix Evo.
Thanks for your help.
Hey nottyfruit,
Did you find out what the actual weight of the Rotor Aldhu 30 alloy crank (165 or 170mm) with 46/30 chainrings is? I am currently in the market for a new crank and wondering why rotor cranks are advertised with a substantially higher weight (~630g) compared to what was weighed in this thread initially (~564g). If the Rotor Aldhu 30 would actually be around 560g it would beat my current FSA SL-K (~ 650g with spacers) by far in terms of weight.

If anyone else has input on this please let me know (even a rough estimate would be helpful; e.g. weight with other chainrings etc).

jch3n
Posts: 197
Joined: Fri Jul 22, 2016 8:34 pm

by jch3n

@Konstantin, here ya go. Hopefully this is helpful for other folks too. I believe page 2 of this thread also mentions that the OP's weight is incorrect.

Aldhu 170mm arms: 346g
30mm Road Axle (standard offset): 96g
46/30 Direct Mount chainrings: 166g
Full crankset: 610g

Vegast 170mm arms: 386g
50/34 Direct Mount chainrings: 171g
Attachments
road_axle.JPG
aldhu_4630.JPG
chainring_4630.JPG
aldhu_arms.JPG
vegast_arms.JPG
chainring_5034.JPG

Konstantin
Posts: 5
Joined: Tue Apr 06, 2021 3:50 pm

by Konstantin

jch3n wrote:
Fri Apr 30, 2021 4:22 am
@Konstantin, here ya go. Hopefully this is helpful for other folks too. I believe page 2 of this thread also mentions that the OP's weight is incorrect.

Aldhu 170mm arms: 346g
30mm Road Axle (standard offset): 96g
46/30 Direct Mount chainrings: 166g
Full crankset: 610g

Vegast 170mm arms: 386g
50/34 Direct Mount chainrings: 171g
Thank you very much! Very helpful.

WorkonSunday
Posts: 540
Joined: Tue Jan 16, 2018 4:39 pm

by WorkonSunday

Hi all, just want to add more data to this thread. seems like a good place for alot of people using it as reference:

my Aldhu 30mm std road axle:
Image

one piece 50/34 chainring:
Image

some Kapic Carbon (MTB version of Aldhu Carbon. slightly heavier but quite abit cheaper. these are 165mm version and without the crank protector rubber shoes:
Image

4 bolt 110mmBCD spider (this spider has groove that only fit Rotor's own chainring and does not work with shimano chainrings)
Image

For those who is interested in AXS, 48/35 Q rings:
Image

A bit heavier than one-piece chainring:
Image
Some say pour 10ml water out of your bottle to save that last bit of the weight. Sorry, i go one step further, i tend to the rider off my bikes. :thumbup:
n+1...14 last time i checked, but i lost count :mrgreen:

AZR3
Posts: 997
Joined: Wed Sep 12, 2012 9:00 pm
Location: Az USA

by AZR3

Not sure if this has been asked but what is the Q factor using the Kapic Cabon arms and road axle?

WorkonSunday
Posts: 540
Joined: Tue Jan 16, 2018 4:39 pm

by WorkonSunday

AZR3 wrote:
Thu Sep 16, 2021 5:53 pm
Not sure if this has been asked but what is the Q factor using the Kapic Cabon arms and road axle?
i will try to do a photo tonight.
Some say pour 10ml water out of your bottle to save that last bit of the weight. Sorry, i go one step further, i tend to the rider off my bikes. :thumbup:
n+1...14 last time i checked, but i lost count :mrgreen:

bikeboy1tr
Posts: 1394
Joined: Thu Mar 21, 2013 3:19 am
Location: Southern Ontario Canada

by bikeboy1tr

LouisN wrote:
Tue Apr 20, 2021 12:24 am
I'm trying to find wich chainrings combo are lighter and what are the weight differences between the following:
1)The 52/36 direct mount combo, or 2) the Rotor spider + both 52 and 36T chainrings + bolts.
Anybody had those combos weighed ?

:beerchug:

Louis :)
Did anyone come up with an answer to this question by LouisN as I am looking into purchasing a Rotor Inspider ALDHU Carbon with this combo myself.
viewtopic.php?f=10&t=154188
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wickedstealthy
Posts: 423
Joined: Sat Jan 02, 2021 3:16 pm

by wickedstealthy

bikeboy1tr wrote:
Thu Nov 18, 2021 1:55 am
LouisN wrote:
Tue Apr 20, 2021 12:24 am
I'm trying to find wich chainrings combo are lighter and what are the weight differences between the following:
1)The 52/36 direct mount combo, or 2) the Rotor spider + both 52 and 36T chainrings + bolts.
Anybody had those combos weighed ?

:beerchug:

Louis :)
Did anyone come up with an answer to this question by LouisN as I am looking into purchasing a Rotor Inspider ALDHU Carbon with this combo myself.
Maybe an option for you. Rotor aldhu 30 + power2max 4sl and carbon arms

I will go down this route as they look awesome

Included a picture of a ngeco 4s and 4sl power2max (ng is 7-8gr lighter) and the 48t aero rings. I think if you go with the regular rotor rings and ng you are close to 600-610gr

I have ordered both and will get both rings aero and non aero and will see what looks the nicest for me 😂

But likely it will be ng with aero 52/36t and pw2m 4sl 👍

Power2max was really helpful to quickly assemble something and do the weights and take pictures. Customer service 😁
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lewolive
Posts: 160
Joined: Tue Dec 04, 2012 4:10 pm
Location: Gien, France
Contact:

by lewolive

bikeboy1tr wrote:
Thu Nov 18, 2021 1:55 am
LouisN wrote:
Tue Apr 20, 2021 12:24 am
I'm trying to find wich chainrings combo are lighter and what are the weight differences between the following:
1)The 52/36 direct mount combo, or 2) the Rotor spider + both 52 and 36T chainrings + bolts.
Anybody had those combos weighed ?

:beerchug:

Louis :)
Did anyone come up with an answer to this question by LouisN as I am looking into purchasing a Rotor Inspider ALDHU Carbon with this combo myself.
Here are some weights that I have verified on recent productions:

-Spider 4 arms: 49g
-4 bolts: 8g
-52Qrings aero: 142g or not aero: 120g
-36Qrings : 35g
-Total: 212g (not aero) or 234g (aero)

Spidering 52/36: 193g


For me the aero version is far above the 2 other options, but it's not sensitive below 300W
Trying to save 30-40g in a major part involved in power transfer is a calculation that must be done for strong or heavy riders.

For my own bike, I chose Aldhu Carbon that has a great stiffness and impressive drop in weight. On chainrings I ride 53/39 Qarbon with Inspider.
However, my FTP is 340-350W and I would have a different mount if my FTP would be 250W.
At lower intensity I think that Rotor not aero chainrings are a good combo.

Karvalo
Posts: 3425
Joined: Fri Aug 10, 2018 6:40 pm

by Karvalo

lewolive wrote:
Fri Nov 26, 2021 3:57 pm
For me the aero version is far above the 2 other options, but it's not sensitive below 300W
Eh? How on earth would you figure that? 300 watts for you or 300 watts for everyone?

I think the women's hour record was set with a lower ave power than 300, and aero was pretty damn sensitive for that.

by Weenie


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lewolive
Posts: 160
Joined: Tue Dec 04, 2012 4:10 pm
Location: Gien, France
Contact:

by lewolive

Karvalo wrote:
Fri Nov 26, 2021 4:25 pm
lewolive wrote:
Fri Nov 26, 2021 3:57 pm
For me the aero version is far above the 2 other options, but it's not sensitive below 300W
Eh? How on earth would you figure that? 300 watts for you or 300 watts for everyone?

I think the women's hour record was set with a lower ave power than 300, and aero was pretty damn sensitive for that.
There is a big difference between a linear effort on track and an effort in a peloton. On track you have let's say 300W AVG=310W NP
On road you can have easily 300W AVG = 360W NP.

So, I mean that you need to know how long you spend above 300W. You may have 250W NP and spend a significant time above 300W !

On Rotor chainrings, I just wanted to say that stiffness is already quite good with the not aero version.

You're right when you say that aero is important, even with a low power you can ride at high speeds and in this case, aero chainrings are a part of the solution.

I ride pretty hard roads at moderate speeds and the stiffness of the aero Rotor chainring is much appareciated !

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