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Tektro brake levers: what's this feature?

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Tektro brake levers: what's this feature?

Old 04-26-18, 12:14 PM
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altenwrencher
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Tektro brake levers: what's this feature?

A new-to-me bike has Tektro brake levers, perhaps the Eclipse MT 2.1 pictured on Amazon. Projecting out of the bottom of the lever itself is an aluminum knob at the end of a shaft. The knob and its shaft can be rotated. What is the function of this feature? What is the correct position of the shaft? I can't discern any functional difference in any position.

At first I thought it might be a parking brake, but it doesn't have that effect.
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Old 04-26-18, 12:21 PM
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Originally Posted by altenwrencher View Post
A new-to-me bike has Tektro brake levers, perhaps the Eclipse MT 2.1 pictured on Amazon. Projecting out of the bottom of the lever itself is an aluminum knob at the end of a shaft. The knob and its shaft can be rotated. What is the function of this feature? What is the correct position of the shaft? I can't discern any functional difference in any position.

At first I thought it might be a parking brake, but it doesn't have that effect.
That knob adjusts the distance from the cable attachment point to the lever pivot, and thus the mechanical advantage of the lever. It allows it to be used with different types of brakes, either linear-pulls, traditional cantilevers, or other styles.
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Old 04-26-18, 12:37 PM
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Does it do that only when the lever is being set up and the cable installed? Because now with the brake cable attached to the lever and the brake, rotating it seems to do nothing.

The bike has side-pull short-reach brakes. How do I tell if the lever is set up correctly? The brakes do work fine.
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Old 04-26-18, 12:44 PM
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Originally Posted by altenwrencher View Post
Does it do that only when the lever is being set up and the cable installed? Because now with the brake cable attached to the lever and the brake, rotating it seems to do nothing.

The bike has side-pull short-reach brakes. How do I tell if the lever is set up correctly? The brakes do work fine.
You answered your own question, seems to me.

But may I suggest that for right now, if it works, don't mess with it. And if you don't know what it does, don't mess with it.

Without an actual part number of the lever you have, I actually can't be sure what you're doing. My ID of the knob and its function is based on the fact that some brake levers have had such knobs and mechanisms for about 20 years. If you could post a photo or provide a part number, that would be most helpful.
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Old 04-26-18, 12:49 PM
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I searched Amazon for "Tektron brake levers" and found a picture of model Eclipse MT 2.1. That looks like what this bike has.

Some day I'll have the lever off and look into it more closely.
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Old 04-26-18, 12:51 PM
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Originally Posted by altenwrencher View Post
I searched Amazon for "Tektron brake levers" and found a picture of model Eclipse MT 2.1. That looks like what this bike has.

Some day I'll have the lever off and look into it more closely.
Check their web site:
TEKTRO USA

Might find it there. But OE stuff isn't always the same as aftermarket.
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Old 04-26-18, 12:55 PM
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The big silver knobs on these levers? They're just for adjusting the brake cable, nothing fancier than that. V-brakes generally don't have barrel adjusters on the brakes themselves.

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Old 04-26-18, 01:16 PM
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If it's like mine, the lever has a choice of 2 pivot positions. Brake cable out of the lever, turn the shaft so there is enough room to move the cable hanger to the upper or lower cable pivot, move to the one you want. More leverage-less cable pull, or less leverage-more cable pull. Then turn the shaft 180 deg,, now the pivot cant move. Mount the cable, done.
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Old 04-26-18, 01:19 PM
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That makes sense - the pivot point is only adjustable with the brake cable out.
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Old 04-26-18, 01:23 PM
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OP. are you talking these screws? Aren't they used to adjust how far out the levers extend so as to be able to bring them closer for those with small hands? (I don't know this but there are a number of levers with that adjustment. I've never had (or needed with my big hands) such levers so I am just guessing.


.......................................l
.......................................l
.......................................l

Ahh, the picture I tried to import didn't work. I'm talking the screw above the vertical "line" I made with the letter "l".

Ben


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Old 04-26-18, 01:58 PM
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No. It's the silver button on the bottom of the lever itself - not on the lever body. I surmise Grizzly59 has the answer, above.
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Old 04-26-18, 02:48 PM
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Originally Posted by altenwrencher View Post
That makes sense - the pivot point is only adjustable with the brake cable out.

They're not alone , in doing that , but perhaps you can see the relative distance of the cable to the pivot, squeezing the lever?

Avid speed dial has a knob in a similar location, but it functions to move the cable anchor closer or further from the pivot..

Setting up another lever , a Trek-Bontrager brand, the head of the cable has 2 sites it can be fitted, closer or further from the pivot,
then you feed the cable thru the housing , to the brake, etc..





....
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Old 04-26-18, 09:25 PM
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Instructions say, position V for v-brakes, position C for cantilever brakes.

https://www.tektro.com/products.php?p=68
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Old 04-27-18, 10:20 AM
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That's cool that these levers are configurable for V-brakes or regular brakes. I learned something.
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