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told you so
I don't think this has already been posted in here but this is some pretty cool tech: https://en.nicolai-bicycles.com/custom-bike-gt1-eboxx-3x3-miracle-topaz/
Personally I'm pretty excited about gearbox and belt drives rather than expensive new chains and derailleurs.
I looked it up. That hub weighs 2kilos! (4 1/2 pounds.) Holy unsprung weight Batman!
48% heavier than a Transmission setup using my napkin math. Would you really notice on an ebike though? If you go through a cassette per year with a transmission setup you would potentially be saving quite a few bucks annually with the no maintenance claim on the 3x3.
If you’re talking about the overall weight of the bike? No.
Unsprung weight on the rear wheel? That’s an extra 2 pounds the rear shock has to contend with…
Perhaps something was introduced in the stealth update that facilitates mineral oil/uses DB8 bladder?
Anyway, can't wait to quote all of the hyperbole back to them from that extremely expensive video about why DOT is best once they come out sporting the superior fluid.
Unsprung. The wheels are unsprung.
You talk what I’m knowin’ about…
(fixed)
Any common sense with that front pulley under BB ,lasting time any bets get smashed and in firing line for water and mud prune be on the way for a Thule car rack too
Which existing lever is this? None I’ve seen
Another photo
I doubt its an inerter, its not connect to the lower legs, so only way it could be if its a oil based j-damper (McLarens code for their original oil based inerter) running of the airpsring shaft somehow, way too complicated.
I think it could be there to monitor the airspring pressures for telemetry (explains why its bolted to air spring side.
Inerters aren't needed on a MTB, its what arms and legs are for.
EXT Aria air shock coming 4 April 2023.
Long time listener, first time caller. Happened to stumble across this (cannot link directly as the posts gets deemed as spam)
weight is said to be 16.35kg
I wonder why they chose the DHF MaxxTerra Exo+ over the much better Assegai MaxxGrip Exo+. Note that the rear tire they chose is a DHR MaxxGrip. I can't imagine the price going significantly higher if they chose the Assegai over the DHF (someone please correct me if I'm wrong).
16.35kg OOTB is pretty good these days for a solid aluminum bruiser bike. A few key upgrades down the line can easily shave this down to about 15kg.
Because the DHF/DHR2 is the best tire combination in the history of 2 wheels.
I will not be convinced of anything otherwise. A 991 911 may be better than a c4 vett in every possible metric, but it’s not a motherfuckin c4 vett.
I was aiming at the tests done last year with the shapely, red caliper with paint splots on it, those were ran with standard Code RSC levers.
Telemetry doesn't explain the rear one though...
really looks like an e-bike…
Looks like a tunable mass damper of sorts.
https://www.youtube.com/watch?v=afa9L2ocZPY
Like that motorcycle tech.
Could it just be a way of measuring travel at the wheel rather than at the shock?
Might be wrong but think that its just a fr 541 wheelset
Seen a number of motogp bikes a few years back with them on the rear swingarm, have also seen them in the rear tail section. Would be interesting to see the test results of each location. My thought is that the inertia damper is to counteract noise when the suspension is in more of an unweighted position
Because when have bike companies ever actually specced tires in a way that makes sense
The front and rear thing are not necessarily the same device. The rear thing looks like a rubber hose or grip zip tied over something to protect it. Might be an accelerometer, quite large for one tho. Could be a wheel speed sensor, or a pressure transducer for brake force? The way it's sticking up so far might be relevant. If its a post mounted to the frame rigidly with an accelerometer at top and bottom and a front triangle mounted one, they could compare the readings to to see how much torsional flex is occurring in the frames rear. To be honest I have no idea if this would work in the real world or if the data would be just too noisy. It'd be comparing only lateral accelerations relative to each other. Vertical displacement is measured by the lvdt on the shock. Tuning flex is a big deal, they have swap out seat stay braces to alter the frames torsional stiffness, but I don't know if they can data log it directly or just go by rider feel. Like isolating torsional flex without using strain gauges and calibrating it to a given frame so x reading from strain gauge equates to y torsional displacement. The accelerometers would be far simpler than strain gauge but less precise, and again might not work at all. And neither method accounts for wheel flex, which is a big part of it.
For the thing on the fork? It's probably not a pressure transducer for the air spring, like shock wiz does. They already have the lvdt (or whatever it is) on the other side of the fork to record the travel more accurately than a shock wiz type device does via gas laws and some calibration. It's got to be something for data logging.
Edit: Actually it'd require a pair of accelerometers on the main frame too to cancel out lean in. Or... you know, they just ziptied some random crap to a bike to keep people guessing.
Spotted this cap on Marmalades bike, any clues? My guess is a bottle cap…
Are we safe to assume this is an aluminum Spartan HP? If so, why the different name?
And why not make it a freeride/park bike with 180ish mm of travel?
motion instruments fork cap for mounting telemetry
https://motioninstruments.com/collections/enduro/products/mips-200-moun…
Ah! Recognized the logo but could´t figure. Thanks!
The two accelerometer idea, the post connecting them would influence the measurement much more than just using a gyroscope (a MEMS device) directly on the frame. And you don't have the issue of measurement synchronisation as well (always a pain when acquiring data off multiple sensors).
But, as you alluded, even a gyro would be influenced by bike lean. And using two gives you the same issue as you have with the accelerometers.
You can easily and precisely measure flex on a fixture. If you use strain gauges all over the frame when doing the measurements, you can also calibrate the strain gauges to certain flex values or to a 3D model. If you have enough of them you can even recreate loadings from the field in your finite element model to see what the external loads are like and use that when developing the next bike.