Factor Ostro
Moderator: robbosmans
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- Posts: 45
- Joined: Sat Dec 26, 2020 7:44 pm
That's probably the most beautiful spindle powermeter combo I have seen! Too bad Elilee cranks are not available in 175.
Speaking of cranks. I seem to overlook something - please help me understand: Why don't people just stick with a Dura Ace crankset? Is it not stiff enough? Too mundane?
Can't possibly be the weight?
Let's say I want a (double sided) Powermeter.
11 speed Dura Ace with double sided 4iiii crank based PM is around 640g (in 175mm).
Rotor with P2M: 661g
- Rotor Carbon Cranks (175mm): 260g
- Rotor 30mm Road Axle: 96g
- P2M NG Eco Spider: 155g
- DA Chainrings (50/34): 142g
- Chainring bolts: 8g
SRAM Red DUB cranks & Quarq DFour PM: 656g
- Cranks & Axle (175mm): 340g
- Quarq DFour Spider: 166g
- DA Chainrings (50/34): 142g
- Chainring bolts: 8g
Speaking of cranks. I seem to overlook something - please help me understand: Why don't people just stick with a Dura Ace crankset? Is it not stiff enough? Too mundane?
Can't possibly be the weight?
Let's say I want a (double sided) Powermeter.
11 speed Dura Ace with double sided 4iiii crank based PM is around 640g (in 175mm).
Rotor with P2M: 661g
- Rotor Carbon Cranks (175mm): 260g
- Rotor 30mm Road Axle: 96g
- P2M NG Eco Spider: 155g
- DA Chainrings (50/34): 142g
- Chainring bolts: 8g
SRAM Red DUB cranks & Quarq DFour PM: 656g
- Cranks & Axle (175mm): 340g
- Quarq DFour Spider: 166g
- DA Chainrings (50/34): 142g
- Chainring bolts: 8g
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- Posts: 50
- Joined: Thu Sep 22, 2022 11:49 pm
For me it came down to accuracy, availability and price.
Switch DFour to Sigeyi Axo 4-110 for Sram 8-bolt crank to save 60 grams.hansotto089 wrote: ↑Wed Jan 11, 2023 3:31 amSRAM Red DUB cranks & Quarq DFour PM: 656g
- Cranks & Axle (175mm): 340g
- Quarq DFour Spider: 166g
- DA Chainrings (50/34): 142g
- Chainring bolts: 8g
https://www.sigeyishop.com/product/axo- ... interface/
Sram DZero weight about the same as Sigeyi. But Sram intentionally make DFour very heavy for whatever reason (punish you for cheating for Shimano Chainring?). Meanwhile Sigeyi Axo 4-110 and 5-110 weight about the same (around 105g).
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- Posts: 1266
- Joined: Fri Feb 22, 2013 5:09 am
Also swap the Rotor to a Sigeyi AXO for a 50g savings.
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- Posts: 45
- Joined: Sat Dec 26, 2020 7:44 pm
You mean swapping the P2M?
Just had to give this another thumbs up - that's an incredible looking Ostro & unique to boot. Love seeing those EXS bars. Wonder how the drop compares to the Black Inc bars.
Just ride ..
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- Posts: 616
- Joined: Sun Feb 28, 2021 3:39 pm
I believe Sigeyi spiders are lighter than P2M SL
The reach and drop of exs aerover are 70 and 125 respectively.
sworks sl8 rtp 56 5.77kg
factor ostro vam 56 6.15kg
specialized allez sprint 2023 7.13kg
retired:
Lapierre aircode 2017
specialized sl7 56 6.75kg
factor ostro vam 56 6.15kg
specialized allez sprint 2023 7.13kg
retired:
Lapierre aircode 2017
specialized sl7 56 6.75kg
Maybe that is helpful. Rotor ALDHu with Sigeyi PMStiffWeenies wrote: ↑Wed Jan 11, 2023 5:53 pmI believe Sigeyi spiders are lighter than P2M SL
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- Posts: 45
- Joined: Sat Dec 26, 2020 7:44 pm
Thanks! Looks amazing. Why did you go for the Rotor chain rings instead of DA? Weight/stiffness or consistent looks?flmo wrote: ↑Thu Jan 12, 2023 10:18 amMaybe that is helpful. Rotor ALDHu with Sigeyi PMStiffWeenies wrote: ↑Wed Jan 11, 2023 5:53 pmI believe Sigeyi spiders are lighter than P2M SL
maybe it's AXS chainring..hansotto089 wrote: ↑Sat Jan 14, 2023 5:17 amThanks! Looks amazing. Why did you go for the Rotor chain rings instead of DA? Weight/stiffness or consistent looks?flmo wrote: ↑Thu Jan 12, 2023 10:18 amMaybe that is helpful. Rotor ALDHu with Sigeyi PM
2024 BMC TeamMachine R
2018 BMC TImeMachine Road
2002 Moots Compact-SL
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault
2018 BMC TImeMachine Road
2002 Moots Compact-SL
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault
I chose them for weight and looks. Don't like the look of Shimano cranksets, that much. Could have gone lighter with the non-aero version, but I think the overall appearnce of the crankset outweighs the burdon of the few additional grams.
This will be combined with an Ultegra 12 speed and DA cassete. Altough not officially marketed as a 12 speed chainring, Rotor confirmed (via Facebook), that it should work without an issue, up to 54. Premier Tech team also used the same combo last year.
This will be combined with an Ultegra 12 speed and DA cassete. Altough not officially marketed as a 12 speed chainring, Rotor confirmed (via Facebook), that it should work without an issue, up to 54. Premier Tech team also used the same combo last year.
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