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Adjusting Tektro Lyra disc brakes due to cable stretching?

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Adjusting Tektro Lyra disc brakes due to cable stretching?

Old 05-23-15, 11:54 AM
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Adjusting Tektro Lyra disc brakes due to cable stretching?

I know these brakes aren't that great but I need to figure out how to adjust them. I think the brake cable stretched alot since I bought the bike because I can press the brake levers almost all the way to get any decent grip. At first I thought the brake pads were worn down but the bike mechanic told me there is still alot of pad left and the brakes just need to be adjusted.

The Tektro manual for this is crap and doesn't explain how to make these adjustments.

Can someone help me out? I'm not that familiar with disk brake terminology (all I know is the brake pads, brake level, cable, and those adjusting screws at the end of the brake cable).

thanks!!
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Old 05-23-15, 12:03 PM
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It would take me longer, explaining it than it would take you to go on Youtube, and watch the many videos of Adjusting bicycle mechanical disk brakes!
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Old 05-23-15, 01:05 PM
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Google that hard? seems to make people so they cant even look for themselves .. I just used It.

TEKTRO BRAKE SYSTEMS

see where it says download manual? do that.

Last edited by fietsbob; 05-23-15 at 01:09 PM.
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Old 05-23-15, 02:11 PM
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I see what the op means, Tektro manual explains how to install but not much else. Adjusting is mentioned over a few sentences. Youtube
has many disc brake adjusting videos, several tektro specific. Our tandem had Avid BB7 and they were kind of fiddly to adjust, especially
if your vision is not great at the 6-12" focus range needed to eyeball the rotor/pad spacing when they talk about 0.3mm distances as tektro
does.
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Old 05-23-15, 02:24 PM
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Generic: stationary pad has an adjustment from the inside face , the moving pad is the cable , easiest, is just use the cable clamping bolt directly
move the actuating arm till its close to the disc (but not rubbing) then retighten the bolt

though a barrel adjuster is typically on the cable housing ..

Squeeze the Brakes on and hold them .. and loosen the 2 "post mount" Bolts (not the ISO adapter Bolts) and still holding the brakes on re tighten them.
that usually cures alignment to the disc issues .

its a pretty common sense sorting it out.

some cheap close focus reading glasses May Help the seeing the Gap
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Old 05-24-15, 05:35 PM
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Is this how you talk to customers at your shop fietsbob? Or do they just keep you in the back? Really,if you're not going to be helpful,don't reply. I've never spoken to anyone at my clinic the way you've responded here.

zimba2,is this a drop bar or flat bar bike? Flat bar bikes will have a barrel adjuster at the lever,drops usually won't. Both will have a barrel adjuster down by the caliper.



In the pic,the adjuster is at full loose. When you tighten the cable,threads will show above the adjuster's mounting point. Just spin the adjuster up until you get the feel you want. If you use most of its range,then spin it back down,loosen the pinch bolt holding the cable on the back of the lever arm,and pull some cable through. Then use the adjuster to fine tune. Note,this both adjusts the cable,and the outer pad. If you tighten the cable too much,it will also move the pad in and you can get rub.
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Old 05-24-15, 06:52 PM
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See here.
You adjust cable position using the cable clamp at the brake. Undo, move arm using allen key, hold cable with fingers or pliers, tighten bolt. Takeup 1-2mm of slack at first.
Don't adjust the stationary pad adjuster, this is for pad wear, not cable stretch.

Last edited by MichaelW; 05-24-15 at 06:55 PM.
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