Viewing 40 posts - 1 through 40 (of 71 total)
  • A close look at Classified Powershift. Two-by is back!
  • chipps
    Full Member

    The Classified Powershift system revolves around a two-speed hub, made in Belgium, that is electronically shifted by a remote shifter.

    By chipps

    Get the full story here:

    https://singletrackworld.com/wp-content/uploads/2023/04/classified-powershift-review/

    2
    robertajobb
    Full Member

    Why ? Maybe because 1x really is The Emperor’s New Clothes after all 🤔

    Anyway, I’m looking forward to getting one of these on my old Stumpy so I’ve got 54 gears to choose from 😁

    Kuco
    Full Member

    Hardly new, GCN did a video review of this about 2 years ago. Though I’ve not heard much about it since.

    1
    thols2
    Full Member

    The Classified Powershift system will be around €2699 for all that

    5lab
    Full Member

    Hardly new,

    It’s new for mountain bikes.

    I wonder if a better setup would be something like a 8 speed wide ratio cassette (11-50 or something) then use the power shift to do the small gears in-between? It would avoid lots of overlapping gears that wY

    martymac
    Full Member

    There seems to be an extra digit on that price, 2699 aint gonna be a big seller tbh, regardless of how good it is.
    I do think the idea has merit tho

    1
    chrestomanci
    Full Member

    It is basically a hub gear that you can mount a cassette on.

    Sturmey Archer have done that for years, and at a 10th of the price.

    Sturmey Archer CS-RK3 3Spd F30 Cassette Hub

    I dare say it is a fair bit heaver, you will need a cable shifter, and it is bolt through rather than quick release, but for £120 vs €2700 I will forgive some shortcomings. It even has 6 bolt disc brake mounts!

    ayjaydoubleyou
    Full Member

    It’s still a 12 speed cassette
    So you will still need a long cage, heavy, 12 speed mtb mech attached to the rear of the bike which negates most of the benefits.

    squirrelking
    Free Member

    Can someone explain to the hard of thinking amongst us how this is in any way better than either a front mech or a Hammerschmidt?


    @kuco

    He looks absolutely delighted with it 🤣

    5lab
    Full Member

    2700 EUR is for the full setup with a carbon rear wheel and cassette. From memory it’s not too far off other top end bike part pricing (xx1 axs etc)

    stevious
    Full Member

    Cost aside, I can see a use for it on road where having close gear ratios is the main reason why 1x hasn’t taken off.

    Struggling to think of a use case at all for MTB. Does anyone really need close ratios on their MTB?

    Edit: thinking about it, this would rule on a gravel bike.

    matt_outandabout
    Full Member

    I think it could also be great on a more touring orientated road bike.

    tomhoward
    Full Member

    Seen a few of them fitted to mega money road and gravel bikes, that look ace with a single front ring, that’s the main market for these I think, they’re just dipping a toe into MTB to see if there’s any takers. Not sure there will be.

    5
    boblo
    Free Member

    2x is back you say? For some of us, it never went away. Still riding several 2x 11 speed road/gravel bikes and several 3x 9 speed touring and MTB bikes.

    It only went away in the blink of a Marketeers eye…

    1
    ooOOoo
    Free Member

    it can make a recordable time difference to a tight singletrack loop

    But all the cool kids said 1x was better?

    squirrelking
    Free Member

    Does anyone really need close ratios on their MTB?

    Downhill riders…

    …yeah, exactly.

    tthew
    Full Member

    It’d be better if they could integrate it with Di2 and AXS to make proper sequential gear selection, for right nice bikes. Too expensive for 99% of us, even the 2by or hub gear gang.

    tomhoward
    Full Member

    It’d be better if they could integrate it with Di2 and AXS to make proper sequential gear selection,

    I *think* that is being worked on, with AXS anyway.

    ampthill
    Full Member

    The problem hear, other silly costs, is it looks like it doesn’t support a 10 tooth sprocket

    The idea that a very expensive hub and 11-42 cassette is 530% gearing only 10% more than 1×12

    The ratios are of course closer. But a 38-10 would do the same thing but you’d get a derailleur that was bit further off the ground and a bit lighter

    sillyoldman
    Full Member

    One of their focuses is efficiency, so they actively avoid 10T sprockets.

    ampthill
    Full Member

    One of their focuses is efficiency, so they actively avoid 10T sprockets

    I kind of get that. But I think off road that might be missing the point. In MTB races Drive Train damage is common and no one is spending very long at that end of the block.

    Onzadog
    Free Member

    One of their focuses is efficiency, so they actively avoid 10T sprockets.

    But use a planetary gear system.

    sillyoldman
    Full Member

    Yes – with less efficiency loss than any other. That’s partly why it’s only 2 speed.

    Efficiency is one of its benefits. You can spend more time in the best chainline area of the cassette by using the hub shift – better chainline is more efficient – esp when using the bigger ring sizes that the system encourages.
    Might struggle in MTB market as efficiency isn’t a prime consideration for many – lots of 28x 10-50/1/2 drivetrains in use.

    The other issue in MTBs is compatibility with a big enough chainring to reap the benefits. 38/40T would be useful, but few frames have clearance for that these days.

    Not an issue on road/gravel.

    squirrelking
    Free Member

    Efficiency is one of its benefits. You can spend more time in the best chainline area of the cassette by using the hub shift – better chainline is more efficient – esp when using the bigger ring sizes that the system encourages.

    You do know you can do that across an entire cassette using multiple rings up front?

    tomhoward
    Full Member

    You do know you can do that across an entire cassette using multiple rings up front?

    Some frames won’t accept a front mech nowadays.

    1
    Northwind
    Full Member

    sillyoldman
    Full Member

    Efficiency is one of its benefits. You can spend more time in the best chainline area of the cassette by using the hub shift – better chainline is more efficient – esp when using the bigger ring sizes that the system encourages.

    I bet you three scottish pounds that any chainline efficiency gains are more than outweighed by the planetary. Yes it’s more efficient than most, but drivechain losses are titchy.

    crazy-legs
    Full Member

    I bet you three scottish pounds that any chainline efficiency gains are more than outweighed by the planetary. Yes it’s more efficient than most, but drivechain losses are titchy.

    I’m not sure that it is planetary. No idea how they’re doing it but all the reviews I’ve seen (including this one by Chipps) suggests that there’s no discernible drag in the lower ratios which sounds rather unlike a planetary.

    Classified have been quite tight lipped about the actual workings of the hub.

    thols2
    Full Member

    I’m not sure that it is planetary.

    tagnut69
    Free Member

    Hambini had a look at this a few weeks back

    mick_r
    Full Member

    3
    tomhoward
    Full Member

    Hambini had a look at this a few weeks back

    and? Not that I could give less of a **** what he thinks.

    1
    nickc
    Full Member

    It only went away in the blink of a Marketeers eye…

    Aye, every single development in anything that one doesn’t like, is always ‘just’ marketing.

    Hambini had a look at this a few weeks back

    Does anyone actually give a single shit about what that idiot clappers on about?

    sillyoldman
    Full Member

    I bet you three scottish pounds that any chainline efficiency gains are more than outweighed by the planetary. Yes it’s more efficient than most, but drivechain losses are titchy.

    There’s no discernible drag at all. They claim that the reduction gear has less efficiency loss than using the inner ring that the hub mimics on a 2x system.

    convert
    Full Member

    I wonder if a better setup would be something like a 8 speed wide ratio cassette (11-50 or something) then use the power shift to do the small gears in-between? It would avoid lots of overlapping gears that wY

    I like that. With the internal gear shift being so fast I think that could work really well.

    I built a recumbent up with the sturmey 2 speed setup a few years ago to get over some terrible chainline issues whilst keeping the jumps manageable (recumbents need an extraordinary gear range to work well on the flat and get up hills).

    On MTB I can see it might be a thing for xc bikes. 1X definitely freed up suspension design so I guess this could give you a tighter cassette and still have access to some lower gears. Gravel too I guess for those with super deep pockets.

    4
    crazy-legs
    Full Member

    Hambini had a look at this a few weeks back

    I forced myself to sit through that one because of interest in the product itself and after the sexist misogynist egomaniac had drivelled on for a while he finally admitted never seen one, never used one and was getting all his info off their website then leaping to his own conclusions about how it worked in order to give it a “Hambini Roasting”.
    The guy is a complete 🔔🔚

    tomhoward
    Full Member

    I forced myself to sit through that one

    Not all heroes wear capes.

    legometeorology
    Free Member

    I’m excited to make a dinglespeed XC/monstercross bike with one of these, as they are also bringing out a hub shell with a short, shimano-splined freehub fitting (see page 10)

    I’m kind of blanking out the price though. Not sure I can stomach it if it’s more expensive than a Rohloff

    thols2
    Full Member

    Hambini had a look at this a few weeks back

    and?

    And it’s a planetary gear hub.

    There’s no discernible drag at all. They claim that the reduction gear has less efficiency loss than using the inner ring that the hub mimics on a 2x system.

    “They” being the people trying to sell it? On a 2x system, you should only be using the inner ring on the largest 3 or 4 cogs so chainline isn’t an issue. I would be very surprised if a smaller chainring alone made enough of a difference to make it less efficient than a planetary gear system.

    boblo
    Free Member

    It only went away in the blink of a Marketeers eye…

    Aye, every single development in anything that one doesn’t like, is always ‘just’ marketing.

    Charming.

    We’ll see. Give it 10 years and see if you can still get their proprietary (very expensive) cassettes. See how well it worked out for Hope?

    mert
    Free Member

    On a 2x system, you should only be using the inner ring on the largest 3 or 4 cogs so chainline isn’t an issue. I would be very surprised if a smaller chainring alone made enough of a difference to make it less efficient than a planetary gear system.

    Whut? Why?

    What’s wrong with your bike that means you can only use 3 or 4 largest sprockets?

    Or is this one of those “everyone knows” that is so popular amongst those who don’t know?

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