Rotor Aldhu

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kafreeman
Posts: 170
Joined: Thu Jul 23, 2015 8:46 pm

by kafreeman

dcorn wrote:
drexel75 wrote:
Wed Dec 05, 2018 6:52 pm
dcorn wrote:
Wed Dec 05, 2018 6:18 pm
Just to update this thread, the ALDHU crank is now available with a 24mm spindle that is a direct replacement for Shimano cranks, plus Power2Max now makes the NG power meter to replace the Rotor spider.
This was what I was thinking of doing. Power2Max Ngeco for the spider/PM and Rotor ALDHU24 cranks and axle with Rotor rings. Not sure if I fancy Q or not. Would this work? I currently have a Shimano BB92 and Ultegra R8000 crankset.
As far as I know, yes. I have the same BB and just replaced my R8000 crank with the Rotor 3D24 crank and attached P2M NGeco. Mine had Praxis rings, but that doesn't matter either way. The crank was a direct swap, pulled out the Ultegra, slide the Rotor straight in. The 24mm spindle on the ALDHU crank should work the same way. I considered the newer crank, but I didn't want to spend the extra couple hundred bucks to save a few grams of weight.
Newer crank fits the same way according to install directions.

I did the same as you, considered the Aldhu but went with the 3D24, PM was less and the crank was less.

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TobinHatesYou
Posts: 12456
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

dcorn wrote:
Wed Dec 05, 2018 6:18 pm
Just to update this thread, the ALDHU crank is now available with a 24mm spindle that is a direct replacement for Shimano cranks, plus Power2Max now makes the NG power meter to replace the Rotor spider.

Seems kind of pointless. The point of the Aldhu system is direct-mount chainrings to allow fine-turning of your Q-Rings OCP, weight reduction, and the allowance of smaller chainrings for gravel/all-road. Adding a spider and traditional bolt patterns eliminates those benefits.

Karvalo
Posts: 3444
Joined: Fri Aug 10, 2018 6:40 pm

by Karvalo

TobinHatesYou wrote:
Mon Dec 10, 2018 4:12 am
Seems kind of pointless. The point of the Aldhu system is direct-mount chainrings to allow fine-turning of your Q-Rings OCP, weight reduction, and the allowance of smaller chainrings for gravel/all-road. Adding a spider and traditional bolt patterns eliminates those benefits.
An Aldhu compatible spider still fits the micro-OCP adjustment points on the axle so you can fine tune to the same degree, very few people want gravel size chainrings and any PM option adds weight anyway. I do think the one piece DM Aldhu rings are significantly stiffer and better shifting than standard Rotor rings though.

TobinHatesYou
Posts: 12456
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

Karvalo wrote:
Mon Dec 10, 2018 5:39 pm

An Aldhu compatible spider still fits the micro-OCP adjustment points on the axle so you can fine tune to the same degree, very few people want gravel size chainrings and any PM option adds weight anyway. I do think the one piece DM Aldhu rings are significantly stiffer and better shifting than standard Rotor rings though.

Every prior P2M has a spider with a cutout for the crankarm. I can't tell for sure, but they may have changed the shape of the ALDHU model specifically to allow a limited amount of reorientation.

benjieb
Posts: 6
Joined: Mon Nov 19, 2018 5:16 am

by benjieb

Just wanted to comment on the weights of this crankset. I've got a direct mount 52/36 chainring, 170mm cranks and the offset axle and it comes out at 624g, so there's something wrong with either my scales or the OPs.

jeanjacques
Posts: 349
Joined: Thu Apr 14, 2016 11:01 am
Location: France

by jeanjacques

benjieb wrote:
Wed Dec 12, 2018 1:09 am
Just wanted to comment on the weights of this crankset. I've got a direct mount 52/36 chainring, 170mm cranks and the offset axle and it comes out at 624g, so there's something wrong with either my scales or the OPs.
The OP corrected the weight on this forum (638g, 172,5, spidering oval 53/39): http://veloptimal.com/forum/viewtopic.p ... 50#p936562

jeanjacques
Posts: 349
Joined: Thu Apr 14, 2016 11:01 am
Location: France

by jeanjacques

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barrios
Posts: 2
Joined: Wed Dec 12, 2018 7:17 pm

by barrios

jeanjacques wrote:
Wed Dec 12, 2018 11:24 am
The OP corrected the weight on https://bestflexiblesolarpanel.com forum (638g, 172,5, spidering oval 53/39): http://veloptimal.com/forum/viewtopic.p ... 50#p936562
Thanks for the link!
Last edited by barrios on Thu Dec 13, 2018 5:09 pm, edited 1 time in total.

JeffK
Posts: 70
Joined: Sun Aug 03, 2014 5:13 pm

by JeffK

I bought rotor aldhu 52/36 chainrings for my Shimano DA 9100 Stages crank. Will post pics and weights when they come in.
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lewolive
Posts: 160
Joined: Tue Dec 04, 2012 4:10 pm
Location: Gien, France
Contact:

by lewolive

tomtom wrote:
Tue Aug 14, 2018 12:17 pm
30mm in a BB86 frame is always a problem....barings cannot cope with such little room :-(. But the Aldhu looks stunning :D !
Problem is solved this year ! Several Ceramic manufacturers have solved the issue with making thin BB.
Image

At about $200, price remains acceptable, considering that this product will last several seasons for an average 5000-7000 miles per year.
Smoothness is great and maintenance requirements are reduced.

https://www.velo-perso.com/en/bb86-fram ... 20179.html

seaneT1
Posts: 372
Joined: Tue Jun 16, 2015 11:08 am
Location: Thessaloniki, Greece

by seaneT1

Hello! Anyone here knows what is the weight difference between rotor aldhu and shimano durace or sram red full cranksets? Thank you!

jeanjacques
Posts: 349
Joined: Thu Apr 14, 2016 11:01 am
Location: France

by jeanjacques

For Sram Red, depends the models, BB30 will be lighter but Red BB386 (635g 50/34) will be slighly heavier than Rotor Aldhu (610g 50/34 DM).

And I received the Rotor Vegast crankset for a friend, 170mm, 379g. 26g more than Aldhu but 110€ less.

Hexsense
Posts: 3270
Joined: Wed Dec 30, 2015 12:41 am
Location: USA

by Hexsense

For people who will pair crank arm to power meter spider,
Rotor Aldhu arms and spindle +Power2max NG spider (no rings) according to power2max website:
110bcd: 601g, 130bcd: 612g, 4 bolts for Shimano rings: 602g

Quarq Dzero BB30 spindle (actually a bb386) + non hidden bolt Quarq spider (no rings) = 551.9g
So the Aldhu's weight advantage is mostly in the directmount rings?

seaneT1
Posts: 372
Joined: Tue Jun 16, 2015 11:08 am
Location: Thessaloniki, Greece

by seaneT1

So changing from a dura ace 9100 crankset to a rotor aldhu will probably not save me any weight :(

kafreeman
Posts: 170
Joined: Thu Jul 23, 2015 8:46 pm

by kafreeman

Nope.

3d24 +p2max weight came in at 792g with 52/36.

SRAM force + p2max or Quarq crank and meter for the min weight.

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