Syntace, Liteville and Canyon are together launching a concept they call KIS (Keep It Stable), which uses a spring to "stabilise" the bike's steering by applying a carefully designed force which acts to pull the front wheel towards the straight-ahead position. This is designed to counter a force called wheel flop, which acts to pull the steering away from centre. We've all experienced this on a slack bike at low speeds, where the handlebars feel like they're steering on their own accord away from straight ahead, leading to wandering steering. The system is also claimed to make the steering less twitchy, more weighted and more predictable.
How does it work?One thing to make clear is that this is not a steering damper. Those have been tried before and seem to be mostly not appropriate for MTBs, where speeds are slow and rapid changes in direction are required. This is a steering spring, which exerts a torque on the steering assembly (the front wheel, fork and cockpit) which depends on the
steering angle - the angle of the front wheel from the straight-ahead position. The further the steering assembly is turned away from straight ahead, the higher the spring force (torque) is acting to pull it back towards the centre.
It does this with a pair of small springs anchored in the top tube, which connect to the fork steerer via a pair of kevlar bands connected to a cam wheel clamped to the steerer tube. As the bars are turned to one side, the springs are stretched, creating a force in the opposite direction. The geometry of the kevlar bands and the cam are designed to give the torque curve below, where the restoring torque increases quickly as the steering angle moves away from straight ahead towards about 15 degrees, then increases more gradually to make it easier to negotiate tight turns without feeling restricted.
This torque is designed to counteract the force created by a phenomenon called
wheel flop. If you stand your bike upright with the steering off-centre, the handlebars will naturally turn away from straight ahead, towards a steering angle of 90 degrees. This is because, as the steering angle increases, the bike frame (and with it the rider) drops towards the ground - by over 10 mm in the case of a slack bike.
To picture this, imagine a bike with a 0-degree head angle (a horizontal fork). Now as you turn the handlebars away from straight ahead towards 90 degrees, the head tube would drop towards the ground by the radius of the wheel. With a vertical head angle, the head tube wouldn't drop at all. So the slacker the bike's head angle, the more the head tube will dip as the bike steers.
This drop in head tube height creates a force which acts to pull the steering away from straight ahead. This is a destabilising force because (within the range of normal steering angles) the further the steering moves away from straight ahead the more force acts to pull it even further away.
The KIS system is designed to compensate for this, making the steering assembly more stable and less prone to pulling to one side.
At the risk of complicating things too much, we also have to talk about
trail. This is the distance by which the tire's contact patch sits (or "trails") behind the steering axis (the line about which the steering assembly rotates as you steer).
Just like a trailer being towed behind a car, the contact patch is effectively towed behind the steering axis, which causes it to naturally fall into line behind it. This creates a self-centring force which counteracts the wheel flop force, and overcomes it at higher speeds. This is why the seeing on slack bikes feels stable at high speeds but unstable "wandering" at low speeds. The effect of the KIS system is to provide an additional centring force which operates at all speeds, making the steering less unstable at low speeds and even more stable at high speeds.
The wheel flop force is dependent on the amount of weight on the front wheel, so the system offers an adjustment mechanism to tailor the amount of counter-force it provides to suit rider weight and personal preference. This is done with a slider which changes the preload on the springs.
In terms of practicalities, Canyon's system weighs a claimed 110 g, and Liteville's a little less. It requires no maintenance and uses a regular fork which can be removed or replaced by undoing the bolt on the cam, which in Canyon's case is accessed via a port on the left side of the frame. At the front of the head tube is a stop screw which prevents the cam ring from turning past 90 degrees. If the handlebars are forced beyond this angle (in a crash, for example) the cam ring will slip on the steerer. When this happens the system needs to be re-set (like straightening a stem) or else the mechanism will pull the steering towards one side.
For now, Canyon are launching just one model with the KIS system, the Spectral CF 8. Canyon say they chose this model because it's their best-selling bike, and they wanted it to be available to the largest number of buyers. The system has been tested on downhill bikes, and even saw action at the Fort William World Cup under Mark Wallace, though only in practice. Canyon say they plan to "roll out K.I.S. across many other models in the future." Liteville have one ebike with KIS integrated: the 301 CE EMTB.
Pricing for the standard Spectral CF 8 is £4599 (4599 EUR) and the K.I.S. equipped bike is £4999 (4999 EUR). It's due to land in the USA in Spring 2023. You can't retrofit KIS to another bike but the system can be removed and blanking plates will be available next year.
Ride ImpressionsI was able to try out the system with a day of uplift-assisted riding on the Canyon Spectral, followed by a ride on the Liteville 301 eMTB the following day.
The first thing I did was carve some turns in the parking lot. Though it feels odd at first, it's very easy to adapt to the system in this case. But riding with no hands on the bars is very difficult. Normally when you lean to the left without touching the bar, the steering assembly turns to the left due to a combination of its own weight, wheel flop and gyroscopic forces, and this steering causes the wheels to move back under the rider's centre of gravity, correcting the lean and keeping you upright. But with KIS, the steering stays closer to straight ahead, so the bike is prone to falling over (known as capsizing). So while the
steering may be more stable in terms of self-centring, this doesn't necessarily make the bike more stable in the sense of remaining upright.
But what about on the trail?
Again, it's easy to adapt to the system on the whole, but there were times when something felt a little odd. I found myself running wide in turns at times, especially with the system's tension turned to the max. It's not that I couldn't turn the steering to the angle I needed to make the turn (the force is quite modest), but the subtle counter-steering needed to initiate a turn required some recalibration. In order to turn left, you first have to steer to the right (counter-steer) so the bike becomes unbalanced and leans to the left; only then can you steer the bike to the left without falling over. I think with KIS engaged (especially on the max setting), I wasn't counter-steering enough and so not leaning enough, so I had to brake in the turn or adjust my steering mid-turn to get around.
Of course, this is something you get used to the more you ride it, but when I switched back and forth between the system's maximum, middle and minimum torque settings on the Spectral, I consistently preferred the minimum setting. I found it easier to make tight corners and stay balanced. Even on high-speed rocky straights, where I expected the bike to feel more surefooted and easier to handle with KIS, I sometimes found my weight in the wrong place and felt slightly less balanced with the maximum preload. I think the constant micro-corrections needed to maintain balance were muted, making it slightly harder to feel poised on top of the balance point.
Similarly, on the LIteville eMTB, I rode some awkward turns and narrow bench-cut trails and felt less able to correct and stay perfectly balanced with the system on when compared to off (the Liteville demonstrator could be switched completely off). When I came to some exposed switchbacks towards the end of the ride I kept the system switched off because that felt safer to me.
Don't get me wrong, the downsides are subtle and easy to overcome with practice. There are some upsides too in that the steering feels more weighted and settled, especially on low-speed uphill switchbacks where there is less wheel flop, but I noticed the downsides more than the upsides. Jo said it takes a long time to fully get used to the system and I'm sure with more time on it I'd adapt to the different forces required at the handlebar to ride smoothly. But the dilemma with testing any new technology is that once you get used to it, you've become unfamiliar with riding anything else. For example, I once cycle-toured for a week on a road bike with heavy panniers; when I took them off, I remember the bike feeling horribly twitchy for the first minute or so. That doesn't mean the handling with paniers was better, just that I preferred what I had become used to.
And while the system reduces the rider input required in some situations, like tight, slow switchbacks, it takes more effort to stay balanced at speed or throw the bike into tight turns. I'm sure that if I'd ridden with KIS for a long time (months or years), a bike without it would feel weird. But it's not clear to me that the system is making the bike easier to handle, as opposed to just different.
Fabien Barel described the system tying the front and rear of the bike together, making it easier to correct front-wheel drifts. He might have a point, and it will be interesting to see if any Canyon athletes use it for racing next season. But from my (brief) time on the KIS system, the benefit is hard to discern.
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Me neither, but I guess I find the term Wheel Flop funny and am hoping to hear some rich dude on a Megatower say it soon.
The parallel 'logic' here would be putting a handle on a skateboard for people who can't take the time to learn how to do the activity without having their hand held or actually investing their energy to learn a skill intuitively, sans instant gratification.
f*ck off already, cunce.
More like K.I.S.S, am I right?
"putting a handle on a skateboard for people who can't take the time to learn how to do the activity"
Congrats you just invented the razor scooter.
Basically just puts these brands on my "do not buy" list.
Just poking for fun
We all ride relatively slack bikes up hills, and around switchbacks, you experience everytime, you’re just not recognizing it.
Can be helpful, I sometimes use that wheel flop to “climb” way way around a tight switchback by cranking on the bars while pedaling
Long and short, it’s a feature available on a bike, not mandatory for you, myself or anyone else to purchase. Doesn’t seem like a feature I need or want, but I’m not making the choices for everyone.
Speed adaptive steering damper, that might be interesting. Loved the steering damper on my dirt bike, not on my mtb
My father is a Stanford Grad with a masters in Engineering. He’s academically brilliant, but I have seen him try assemble a small pre made doll house for my daughter, it’s no different than asking my dog do try and do it.
TOM CRUISE OF ALL PEOPLE KNOWS THAT THIS SYSTEM IS NOT NEEDED AT ALL....
And why? Because of Top Gun (well...the F16). Modern fighter jet are MADE to be unstable; they literally cannot fly in a stable mode without deliberate input from computer systems. The idea is simple. An unstable plane is a manoeuvrable plane. You can flick it to the right and it just goes...WHAM...because it is ready to fall in any direction and the pilot's and computer's input just exploits that 'flop' and over it goes, immediately. I have always considered wheel flop to be exactly this.The bikes now - with a 63 static angle like the COTIC BfE Max - just instantly turn to the left or right with a relaxation of control and an input to the side you wish to turn to. They are like an F16. And this explains the review experience above. You don't have to fight the tendency of the bike to go straight, since it inherently wants to turn. When turning, you are more giving an input to stop the inherent turn than force the bike to turn. Wheel flop is therefore an ASSET for a responsive, manouverable and ultimately safer bike.
Some here have said that this is a solution to a problem which does not exist. I would go further. It actually takes out a considerable advantage of current low, low and slack bikes. It is REGRESSIVE.
After all, Brandon S and Brett R have hardly wandered around saying '...I feel my bikes oversteer all the time, I mean they are really holding us back....' far from it, the performance envelope has just expanded in a mind-blowing way as bike geometry has developed in the last 10 years.
That bike had these springs on it. I dunno. It also had some of the least comfortable cornering characteristics (that it shared with another heavy ass cargo ebike a friend had) --it would understeer at speed, like you could feel the front tire pushing away from you. Sounds like the Canyon in this article on trail...not into it, don't want it.
Maybe if I didn't already have decades of (shittily) turning bikes in my past, maybe this'd be for me. But man, I know wheel flop: it happens when I'm pedaling a DH bike over to Crank it Up and them. It means I'm going too slow. Gimme all the flop you got there, it's well worth the tradeoff for being able to ram into rocks like a dipshit later on. When your bike is choppered out you can go faster.
I can totally see it on the cargo ebike, but why are these weirdos putting it on a ripping trail bike? What're these Canyoneers even doing? What's next? You gonna let MoiMoi go oh wait
I'm imagining those springs banging around in the top tube all day too...reminds me of those butterfly exercise things we had in the basement--five springs lined up like guitar strings? Nobody ever used them, but everyone got pinched in the springs. They had that sound. That sound lives inside these bikes.
But yeah put them on the cargo bike sure that's fine, that bike rode so weird already, it's not gonna hurt...
love you MoiMoi
Riese and Muller Delite/Homage are full suspension E-SUV's with steep head angles that handle great as city/trekking bikes...because that's what they are... need more of those bikes and less of this trash on actual mountainbikes
www.bikemag.com/blog/hopey_steering_damper_review
AM I that old???
And why are we bringing Tom Cruise into this?
I can see that it may suit some riders for adaptability purposes, but not one for me.
www.hopey.org/product-info.php
but yeah it's totally terrible on grampa's full suspension comfort cruiser that occasionally *might* go down a fireroad which he bought mostly to keep the potholes from hurting his back on neighborhood streets.
I swear if another XC rider tells me an Orbea's 66degrees is not "slack enough" for their XC stuff because they read a review testing on steep things they'll never ride, I'll scream
@ReformedRoadie, @ArcticBeast: Nice to have people around here who remember things like the Hopey damper! Would be interested to try one.
i haven't seen the new one yet though
your slopestyle bike reference also seems clunky. those bikes are the least changed in the cycling universe over the last decade.
but I dig the typing styles!
And you're gonna pay extra for it so you won't be the only dude with a 35lb trail bike with tubeless tires, tons of sealant, tire inserts, 4 piston brakes with 200mm rotors and 5 different adjustments at the brake lever and 2 more at the caliper & we're gonna stuff everything from cables to gears to a flashlight inside your bike.
Oh...and then we're gonna tell you the only way to be happy sf to shove batteries inside a Bosch drill powered moped that looks like your bike swallowed a linebacker from the University of Georgia's schlong.
Problem solved.
This isn’t new, how do you think we have been riding sport bikes for decades
Jesus people, i don't think i want or need this either but that doesn't mean its bad if someone else does.
I can only assume you ride a single speed, fully rigid bike, with canti brakes, and repacking your your hubs weekly……don’t $hit on others simply cause it doesn’t fit your version of what mountain biking is. There’s room for everyone, and all their wacky innovations.
For the record, doesn’t seem to make sense for me, but I’ve never tried it, and maybe it’s as good as modern geo on bikes
Does this really need to be fixed? Not on my bike.
But of course, with bike industry being where all the bottom barrel engineers go to work, these guys made it all wrong with springs instead of dampers.
This system looks like it prohibits cable routing through stem and headset. Winner!
A spring to pull the handlebar straight is fairly common on commuter bikes where you have a crate on the front rack or a kid on a steerer mounted child seat. This helps to keep the bars from rotating when the bike is on a kickstand. One common system is to have a lock on the headset, the other is to have a spring between fork and downtube. That's a single spring though. Maybe this one is more advanced in a way though it also seems more vulnerable too if one spring becomes stiffer than the other one (through overstretching in a crash or an accidental bar spin).
The downside to that is you then have to reset it, so I can imagine nobody will be racing this setup. Quite a few EWS guys mention having crashes in a stage, trying to straighten up their stem again and having to deal with it being off for the rest of the stage, so having that PLUS the KIS effectively pulling your steering at the same time would be balls.
It seems to me that if you need to spend significant time on the system to get used to it, perhaps you would be better spending the same amount of time getting used to dealing with a slight tendancy to wheel flop at low speeds.
Other than the comment from Barel, it feels like this is aimed at less experienced riders to help them ride slack bikes at low speeds more comfortably. Perhaps it would be better to offer bikes with less agressive geometry to these riders instead? But I suppose that means greater tooling costs for two sets of frame geometry, when this can just be added at little cost and increase the profit margins.
Anyway, no thanks.
Most front wheel washouts are from oversteering a front wheel drift so I can see that but what of the downsides
I can go from the 65 degree HTA on my AM bike to my 70 degree cross bike with no problem but to add something like this to the fleet would be inviting a crash.
Absolutely. I have a manual transmission car with a hill-holder. It is a bug for me, not a feature. So many years of cars acting one way suddenly boom stop why are you helping please go away! Spent a couple months stalling or chirping the tires like I was 15 all over again. This thing has the same vibe. Let me feel the flop. I'll deal with it. I know it's coming. Flop it.
"What "standard" shall we invent next?"
"Wider hubs?"
"No, done that a few times - let's leave that one for a year or two"
"Bigger tyres?"
"Done it too but the public realise it was crap"
"2wd ebikes?"
"Too soon. Too soon. We're still trying to deal with the schmucks who don't think they want an ebike at all. Win them over to the idea of 70lb lumps of motor driven lead and we can try the 2wd thing"
"What else then?
"Let's invent something we can flog. An idea. You know everyone moans about the steering on slack bikes?"
"No?"
"Yeah whatever. Everyone moans about slack bikes so let's attach a spring to the steerer, tell the public it's to fix 'wheelflop' and get a few manufacturers to jump in with the idea"
"Sounds crap. Will anyone actually believe this garbage"
"It's either this or superdoopaboost hubs"
"OK, wheelflop it is....."
There is already enough s#%&E going through the headset.
Anyway, you are correct- the problem is the geometry of the bike doesn't match the use case.
In-stem cable routing
In-body cable routing
Wireless everything
This thing
Magnetic pedals
Am I missing anything else? A battery?
If there is one thing I Try while on my bike is remaining upright, call me old fashion.
We find the same kind of solution (simplified) for low-entry city bikes from a big manufacturer in Europe : www.decathlon.fr/p/velo-de-ville-elops-520-cadre-bas-mint/_/R-p-145734?mc=8378612&c=BLEU . In that case, people riding those bikes are beginners and not everyday bikers, and having a thing who help to maintain a straight line in traffic is probably a life-saving option in some cases.
But in my example it was the low-priced bike...
www.google.com/search?q=stuurveer+mamafiets&prmd=simvn&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjDtcrvlPv6AhUwyLsIHZSQBFkQ_AUoAnoECAMQAg&biw=360&bih=568&dpr=2
de.aliexpress.com/item/33001865310.html
So why are we f*cking with the human body's intrinsic ability to properly ride a bike?
This is what happens when the marketing department's headcount is larger than engineering's.
Next: "Why do all wheels have to be round?"
www.decathlon.co.uk/p/city-bike-elops-520-low-frame/_/R-p-145734
This idea isn't just stupid, its actually the polar-opposite of smart. Some sort of new word needs to be invented to describe it.
I really wonder if at some point geometries with steep head angles but long trail and wheelbase will break through. In theory those solve the wheel flop problem without losing the stability of current geometry. It will take a different design of the fork/steering assembly that will initially not be esthetic. Also, I have no idea to what extent that geometry will be better in practice.
In 2025 there will be a lot of smart non-electric/e-bikes with stupid riders, same as it is with phones…
In 2026 the high end bikes will no longer need rider to ride it…
velo-orange.com/products/vo-wheel-stabilizer
This, on the other hand, is another ebike centric abortion.
I had one on my 2003 balfa bb7
www.hopey.org/downhill.php
Oh wait, the same happened with mountain bikes...
I own a hardtail too, but I guess on a mountainbike it's okay two have two springs in place. But certainly no more than that!
Idk, hard to see this as a problem worth solving. Kudos for trying something new though, we'll see how it pans out.
just leave the POS Acros headset your bike came with in there for a few extra months, let it get good and indexed, and VIOLA! self centering steering!!!
Check out Instagram.com/BeMoreBikes for more about stems that reduce the torque that wheel flop has on your hands.
Now, if they can only go to the hospital to get stitched instead of us, and make excuses to my wife why I missed lunch again,...
LOL.
Then we wait some time…
Finally we will have Friday Fails with riders down and their bikes will simply continue their journey…
Prove it to yourself this way: Clamp a bike in a work stand at an angle that's level to the ground and wheel pointed straight ahead. The wheel will still flop if you give it a slight nudge (if it doesn't, your headset is too tight; this is actually one way to test a headseat's preload). This is because both the fork offset and the stem length give the handlebar-to-fork-to-wheel assembly a higher center of mass when straight ahead than when turned.
[ x ] Keep it stupid
In all seriousness cool I guess but not a problem I experience so I cannot understand the benefit. I guess it's one of those you have to try it things.
When I though Canyon would be an excelent choise for my next bike, I have to pay for this???
If people have problems, and are glad to have this gizmo, I have a better solution:
TRY SOMETHING ELSE.
Who wants to buy my notched headset bearings? The bearing was £30 but because I've enhanced it, it's yours for £100.
Marketing: "Compensate bad Geo's!"
If so, you *might* benefit from a steering damper.
If your arms are particularly noodly
And your pushbike has a 1000cc engine.
Yeah, that's his Wreckoning....
Whole frame filled with PU foam to reduce resonating frame.
A damper just slows the movement, this device doesn't slow the movement, just pushes it back to the center. Which, it also says in the article that this is NOT a damper like used on motorcycles.
2026: Coils are so old-fashioned, air spring version is out.
a spring that return your cranks horizontal.
Nice feature for perfect bike photos.
"We need to set the price up... 15k is not enough.."
Yes
en.m.wikipedia.org/wiki/KISS_principle
Keep it simple.
Canyon: “Hold my IPA”
Now that is a problem
my bike tho