Rotor Aldhu

Discuss light weight issues concerning road bikes & parts.

Moderator: robbosmans

bikeboy1tr
Posts: 993
Joined: Thu Mar 21, 2013 3:19 am
Location: Southern Ontario Canada

by bikeboy1tr

wickedstealthy wrote:
Fri Nov 26, 2021 11:07 am
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 😁
Thanks for the reply and wow thats a light setup. I did have a change of mind with the Rotor as I wasnt too sure about the chainline on Campy Record and was told it would be better to go with the Campy P2M NGeco which I did and weighed it once I received it. With no rings it came out to 0.638kg and thats with the BB bearings mounted on the Campy crank spindle. The chainrings come in at 0.157kg (52/36) including chainring fasteners so a good bit chunkier than this chainset you are showing here.
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wickedstealthy
Posts: 59
Joined: Sat Jan 02, 2021 3:16 pm

by wickedstealthy

bikeboy1tr wrote:
Fri Nov 26, 2021 10:53 pm
Thanks for the reply and wow thats a light setup. I did have a change of mind with the Rotor as I wasnt too sure about the chainline on Campy Record and was told it would be better to go with the Campy P2M NGeco which I did and weighed it once I received it. With no rings it came out to 0.638kg and thats with the BB bearings mounted on the Campy crank spindle. The chainrings come in at 0.157kg (52/36) including chainring fasteners so a good bit chunkier than this chainset you are showing here.
I ordered both and will have somewhere next week the aero rings and regular ones. A few grams here and there I don't care. I just wanted to see how it looked 😁
I will go with rotor and power2max. Seeing the gplama video made my decision easy. It seems ones again that the Shimano pwm is finicky. And given that but my p2m meters always work, don't have to care about calibration and run always consistent was a no brained. And now that weight compared to the dura ace crank pfff
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ipenguinking
Posts: 652
Joined: Sun Jan 09, 2005 5:14 pm
Location: Sunny So Cal

by ipenguinking

wickedstealthy wrote:
Fri Nov 26, 2021 11:07 am
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 😁
This is one good looking combo and I might end up with same PM setup on my new bike. Does anyone know which bottom bracket(s) would work with this PM? I'm planning to have my new titanium bike built with T47 bottom bracket.

wickedstealthy
Posts: 59
Joined: Sat Jan 02, 2021 3:16 pm

by wickedstealthy

ipenguinking wrote:
Sun Nov 28, 2021 3:42 am

This is one good looking combo and I might end up with same PM setup on my new bike. Does anyone know which bottom bracket(s) would work with this PM? I'm planning to have my new titanium bike built with T47 bottom bracket.
It's a rotor 30mm aldhu. Quick search T47 rotor gives you plenty of bb 😁
I will get a T45 CS bb as I need to fit this on. Colnago

Will do some additional weighing this week when I get the real 52/36 aero rings and the regular ones. But I'm sold whatever the outcome.

ipenguinking
Posts: 652
Joined: Sun Jan 09, 2005 5:14 pm
Location: Sunny So Cal

by ipenguinking

Should I go with standard road or offset road axle? Crank is a P2M Aldhu Carbon 30mm. Standard road frame w T47 68mm bb she'll, DA9200 disc drivetrain

Etienne
Posts: 360
Joined: Tue Aug 23, 2005 11:41 am
Location: France

by Etienne

ipenguinking wrote:
Fri Dec 10, 2021 4:27 pm
Should I go with standard road or offset road axle?
For a road bike, even with disc brakes, the standard axle is better suited.

The offset axle I have on my gravel bike needs a GRX front derailleur, and is only useful for better tire clearance.

tman
Posts: 2
Joined: Sun Dec 20, 2020 10:02 am

by tman

I currently own a Pyramid Cycling Design 1x 110BCD x 4 chainring with an Ultegra crankarm. I want to switch to a shorter crank length and decided to get a Rotor crank arm. Would the Rotor DM Spider 4-arm 110 BCD spider fit this chainring?

wickedstealthy
Posts: 59
Joined: Sat Jan 02, 2021 3:16 pm

by wickedstealthy

tman wrote:
Sat Jan 22, 2022 2:17 pm
I currently own a Pyramid Cycling Design 1x 110BCD x 4 chainring with an Ultegra crankarm. I want to switch to a shorter crank length and decided to get a Rotor crank arm. Would the Rotor DM Spider 4-arm 110 BCD spider fit this chainring?
Why do you stick to those chainrings ? If I look at them they seem to be quite closed (no real mounting tabs) around the center and will likely intervene with the preformed arms of the spider which are there to perfectly fit the rotor rings with tabs. Still the aero rotor rings have proper tabs to mount on the spider.
I would say no from the pictures. Why not save you the hassle and just buy the rotor aero rings to fit then.
If you mount a powermeter spider like power2max they will likely fit as they have no preformed arms to fit the rings to. But thats another story :mrgreen:

Karvalo
Posts: 2139
Joined: Fri Aug 10, 2018 6:40 pm

by Karvalo

wickedstealthy wrote:
Tue Jan 25, 2022 3:56 pm
tman wrote:
Sat Jan 22, 2022 2:17 pm
I currently own a Pyramid Cycling Design 1x 110BCD x 4 chainring with an Ultegra crankarm. I want to switch to a shorter crank length and decided to get a Rotor crank arm. Would the Rotor DM Spider 4-arm 110 BCD spider fit this chainring?
Why do you stick to those chainrings ?
Pyramid 1x rings are most popular (AFAIK) in the UK TT scene with people running massive tooth counts. So if I had to guess I'd say he's probably using a bigger chainring than Rotor make.

wickedstealthy
Posts: 59
Joined: Sat Jan 02, 2021 3:16 pm

by wickedstealthy

Karvalo wrote:
Tue Jan 25, 2022 5:26 pm
wickedstealthy wrote:
Tue Jan 25, 2022 3:56 pm
tman wrote:
Sat Jan 22, 2022 2:17 pm
I currently own a Pyramid Cycling Design 1x 110BCD x 4 chainring with an Ultegra crankarm. I want to switch to a shorter crank length and decided to get a Rotor crank arm. Would the Rotor DM Spider 4-arm 110 BCD spider fit this chainring?
Yeah was thinking the same ;) But that limits its possibilities for a spider

Why do you stick to those chainrings ?
Pyramid 1x rings are most popular (AFAIK) in the UK TT scene with people running massive tooth counts. So if I had to guess I'd say he's probably using a bigger chainring than Rotor make.

tman
Posts: 2
Joined: Sun Dec 20, 2020 10:02 am

by tman

wickedstealthy wrote:
Tue Jan 25, 2022 3:56 pm
tman wrote:
Sat Jan 22, 2022 2:17 pm
I currently own a Pyramid Cycling Design 1x 110BCD x 4 chainring with an Ultegra crankarm. I want to switch to a shorter crank length and decided to get a Rotor crank arm. Would the Rotor DM Spider 4-arm 110 BCD spider fit this chainring?
Why do you stick to those chainrings ? If I look at them they seem to be quite closed (no real mounting tabs) around the center and will likely intervene with the preformed arms of the spider which are there to perfectly fit the rotor rings with tabs. Still the aero rotor rings have proper tabs to mount on the spider.
I would say no from the pictures. Why not save you the hassle and just buy the rotor aero rings to fit then.
If you mount a powermeter spider like power2max they will likely fit as they have no preformed arms to fit the rings to. But thats another story :mrgreen:
Yeah, that's what I ended going with. I now use it with an aero spider and the 1x aero 54t chainring.

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