Sorry I don't have a link. The test was in Tour 12/2020 on page 54SCJKJ wrote: ↑Fri Apr 09, 2021 4:41 pmDo you have a link? Somehow I can't find this.Cycomanic wrote: ↑Mon Mar 29, 2021 5:33 pmTour magazin tested the efficiency of the classified and unfortunately it does not look that great. They found 93.5% efficiency in the easiest gear. Compared to ekar that was 2.5% to 4% less efficient (dependent on gear). So if your riding up a mountain at FTP of let's say 300 W and your friend is riding ekar next to you they only have to push 287W. Compared to a 2x12 that difference will be even bigger because it's even more efficient.
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Classified hub - Is this the new big thing?
Moderator: robbosmans
4-5W at 40 km/h is completely unrealistic. The FD is in nearly completely disturbed air and therefore changes at that position will hardly make any difference. Even for the the flush skewers gains on the order of Watts is dreamland territory and a skewer at the front wheel sits in much more undisturbed air than the FD. The thing about aero gains is that if it sits in distburbed air and does not somehow prevent reattachment of the airflow (which the FD clearly doesn't) it will hardly have any influence on the aerodynamics.aeroisnteverything wrote: ↑Thu Apr 08, 2021 11:27 amThe gain is hard to measure because it depends on the frame, yaw angle, etc. A frame with an uncovered FD mount migh give very little gain,while a frame designed for 1x from the get go should show a pretty decent one. In any case, the gain is there - hard to see how it couldn't be! People have measured that flush skewers save a handful of watts, so I'd say around 4-5w at 40kph for a frame sans FD is in the realm of reasonable.Lina wrote: ↑Thu Apr 08, 2021 10:55 amIs there going to even be a real aero gain from no FD since the efficiency losses only happen on the small chainring ratio. And when you're on the small chainring you aren't going that fast.tjvirden wrote: ↑Thu Apr 08, 2021 10:22 amWould you care to put a number on the "aero gain" from no FD?aeroisnteverything wrote: ↑Thu Apr 08, 2021 9:27 am4 percentage points isn't great. But I still don't get the comparison. Are they comparing Ekar to Classified in it's low gear config? That's not quite right since most of the time, you'd be riding in the equivailent of a big ring, with zero losses - a configuration where Classified should be more efficient than Ekar.
The real apples-to-apples needs to be a comparison vs the standard Dura Ace or Ultegra 2x11 set up accross the cassette range with a compact or semi-compact crank. I think it's fair to say that if Classified looses 4% to the small ring of a 2x setup, then they have work to do. If it's more like 2-2.5% loss or less vs small ring, then that may be entirely tolerable and might be largely offset by the aero gain from loosing the FD.
I don't get the last comment though. The aero gain is going to be there for all ratios, since the FD is gone permanently. The additional drivetrain loss is only there for the time that you are in the "small ring" on classified system. So if you are only riding in "big ring" or are in the big ring 90% of the time, then the classified system should be a definite net positive. If you are climbing a lot, then this is a lot less clear.
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2015 Pinarello F8: 13.13lbs/5.915kg(w/Roval 64's). Sold.
2016 Rca: 11.07lbs/5.048kg.
2015 Rca. 11.15 lbs(w/Roval CLX 32's)
2015 Rca/NOS(sold).
2018 S-Works SL6 Ultralight 12.03lbs(w/Roval CLX 50's)
2016 Rca: 11.07lbs/5.048kg.
2015 Rca. 11.15 lbs(w/Roval CLX 32's)
2015 Rca/NOS(sold).
2018 S-Works SL6 Ultralight 12.03lbs(w/Roval CLX 50's)
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3T should have loved this for the original Strada. I would seriously like to try it. The thing that would worry me is that the company is new aka small, if shit goes down, well you get it!
Bikes:
Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
The U.K. rep came in to the shop a few weeks back and his bike had it on.
The shifting is immediate and doesn't feel that draggy. It does freewheel a little less well. There is definitely more weight towards the back of the bike but apparently not much more than the chainring/front mech. The cassette shifted well enough that I didn't think about it until now I'm reflecting.
We are trying to get a demo wheelset to sell them from. I'm not sure I'd use it but it's definitely intresting technology.
The shifting is immediate and doesn't feel that draggy. It does freewheel a little less well. There is definitely more weight towards the back of the bike but apparently not much more than the chainring/front mech. The cassette shifted well enough that I didn't think about it until now I'm reflecting.
We are trying to get a demo wheelset to sell them from. I'm not sure I'd use it but it's definitely intresting technology.
If SRAM acquire them we’re sorted.
No idea how much funding these guys have but doubt it’s enough to iterate this to where it needs to be for road race. And even if they do, they’re not integrated. Just sell to SRAM and pat yourselves on the back. After a few years they might have it optimised and we all win.
The alternative is this becomes decently adopted mid level recreational/touring/commuter tech.
No idea how much funding these guys have but doubt it’s enough to iterate this to where it needs to be for road race. And even if they do, they’re not integrated. Just sell to SRAM and pat yourselves on the back. After a few years they might have it optimised and we all win.
The alternative is this becomes decently adopted mid level recreational/touring/commuter tech.
it's a little more then a FD+chainring. The penalty is about 350g . I'd still do it on the gravel rig.Dat wrote: ↑Fri Mar 18, 2022 9:58 amThe U.K. rep came in to the shop a few weeks back and his bike had it on.
The shifting is immediate and doesn't feel that draggy. It does freewheel a little less well. There is definitely more weight towards the back of the bike but apparently not much more than the chainring/front mech. The cassette shifted well enough that I didn't think about it until now I'm reflecting.
We are trying to get a demo wheelset to sell them from. I'm not sure I'd use it but it's definitely intresting technology.
2024 BMC TeamMachine R Building
2018 BMC TImeMachine Road
2002 Moots Compact-SL- getting aero look makeover
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault - completed project, full Xplr package
2018 BMC TImeMachine Road
2002 Moots Compact-SL- getting aero look makeover
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault - completed project, full Xplr package
I wonder if anyone's tested the cassette on all three.
Unless it's somehow really really cleverly machined I'd expect the reality to be more like "our cassettes are compatible with any 12s groupset, so expect shifting to be somewhat bad to terrible no matter which one you have".
Giant Propel Advanced SL Red Etap 11s Easton EC90 wheels CeramicSpeed BB Zipp SL70 bars 6.5kg
Vitus ZX1 CRS Campy Chorus 12s Bora WTO 45 disk brake wheels Zipp SL70 bars 7.5kg
Vitus ZX1 CRS Campy Chorus 12s Bora WTO 45 disk brake wheels Zipp SL70 bars 7.5kg
SL8 build with Craft CS5060 Wheels in progress
Personally I think a larger small - big difference is really where the benefits of this will lie. While the ratio is ~0.7, essentially mimicking a conventional 2x front setup, it doesn't really solve a problem for me. But change that ratio and all of a sudden you have no overlap, 22 discrete gears. Or where you would normally have a 1x large range cassette, on a gravel bike for example, you can now get the same absolute range but with much closer jumps and double the gears in between. Plus there probably wont be the same weight penalty if you're ditching a heavy 11-42 cassette for this system.
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