It is stepless, so completely smooth. It doesnt have any microratchet feedback. The bike is currently st the office so the next time im there ill take a video.
Lever A pulls cable, lever B releases tension, just like campy.
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I still canât wrap my head around how that works with friction shifting so I guess Iâll have to buy a set and build a bike around them to find out for myself
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think of it like a traditional friction lever shifter that âreturns to centerâ
or a pull/release trigger shifter that has an extremely fine-grained ratchet
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I totally get how it works from a pulling perspective. Iâm not sure I get how it works from a releasing perspective. The way Iâm imagining it working, it would be very easy to accidentally dump a bunch of gears.
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Yeah, thats where I am struggling. How does it know how far to go down, on the release, cos without the indexing plate, it seems like it could drop you smack in the middle of between gears ?
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I havenât handled these but I imagine there is no release, just a friction drum and two levers with a ratchet type mechanism, one to push it each direction.
The shorter lever can push it in the direction that the der spring pulls the cable since itâll need less force that way
And the ratchet would have to engage/disengage over the first part of the lever throw in order to not prevent the other lever from working.
Like this. Springs at the pivot points, the first little bit of travel grabs the drum and the rest turns it
Youâre aware that the drawing makes no sense, right? If anything, Iâm more confused now.
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Blue circle is the little drum the cable wraps around. Itâs just like an old school friction shifter except no fixed lever. The horizontal and vertical things are the shift levers. When you push on the end (1), first the outer L shaped piece rotates a little bit so the short part of the L engages with the edge of the drum(2), maybe via teeth. Once the short L segment has engaged, the force applied to the end has nothing to do but turn the whole drum(3-4). Let go and springs take the lever back to its starting position but the drum remains shifted.
One shift lever pushes the drum to take in cable, and the other pushes it the other direction to let out cable, just like pushing on the lever of a regular friction shifter.
I donât know how they actually do it but this is one concept that could work.
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i donât fully understand but iâve got plenty of time for @JUGE_FREDD to figure it out before i donât end up buying it and regret it when iâm 50 and realize that it was the brifter that got away
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So it basically works like I said except the components are spaced along an axle for better packaging and the lever mechanism is replaced by an âin house designed clutchâ with equivalent function.
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Yeah I guess that kinda makes sense. I wanted the cable release to work like an indexed shifter, so of course that wasnât going to work. The âclutchâ holds the cable in place whether you are shifting up or down. Like a friction shifter. Lol?
Itâs cool but as a dead ender I am still into bar ends
That could be an album cover from 80âs of a collab between Brian Eno and XTC.
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it works exactly like a friction shifter from both a pulling and releasing perspective.
but instead of one lever that you push or pull, you have two levers, each of which are connected to the friction mechanism by a one-way roller bearing (âby an onyx freewheelâ). So each lever can push the friction mechanism one way, but canât pull it the other way - when you stop pushing each lever, a spring makes that lever freewheel back.
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Unlike a brifter or trigger shifter, you arenât really âreleasingâ the cable.
Traditional brifter is a âdigitalâ push. It either releases or it doesnât. No matter how little or how far you push the reduce-cable-tension lever, once you get past that release point, the cable spool unspools until it engages the next pawl.
On this thing, itâs literally a friction shift. âAnalog pushâ. When you are pushing the reduce-the-cable-tension lever, you are directly unspooling the cable spool by the exact amount that you push the lever. Just like any other friction shifter, itâs on you to push the lever the right distance to not end up between gears, and if you do end up between gears you can just poke a little bit at either lever to adjust.
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For sure. It just looked to me like âBâ was a release rather than being another friction pusher. Makes perfect sense now.
So really the bigger âriskâ with this system is that if you under-shift and release the lever, then you have to push the lever again to finish the shift. Which is probably not that big of a deal because ideally you are just going to push the lever until it shifts every time but a little different than a normal friction set-up
Seems like one lever that stays in place like a friction shifter across like 30 degrees would be better so you could learn to feel the position s
Like the one with the thumby glued to the top but integrated under the brake lever