Here at Park Tool, we like to put a lot of effort and thought into what we write and what we present.
so when there's a lot of different procedures that you have to cover,
we have to go through it and think of what order it's going to be.
Now as bikes change, the techniques change, and the procedures change, and the teaching also changes.
An example of this is our new derailleur adjustment procedures,
which differ a bit from some traditional procedures taught in shops and even some manufacturers.
So let's look why we did that.
Let's go back and begin with this beauty right here: a nice friction shifter.
on the friction system, it's very direct - very direct feel from the lever.
The lever's right here, we pedal, we pull pull pull, and we pull all the way
and it makes the shift or doesn't make the shift, but it's a very direct feeling from the lever
You know if the linkage is touching the limit screw - very simple. Very easy to adjust.
You may be wondering if you've never seen these these bikes before - a friction shifting bike -
how do they adjust those gears in between?
Well, there's a device for that that's over here.
What this device did at the bike shop,
You could think of it as an app that programs the on-board computer: the customer.
So the mechanic was basically done, it's now the salesman's job to take this device and teach.
"Well sir, when we're riding our bike, we're going up the hill
we pull the lever down and it's an easier gear.
and if there's a funny noise, you back off a little bit."
So the adjustments are made here at the lever, that's how you get your ten gears
and you get rid of those funny funny noises with manual settings.
Okay, nowadays we have the modern click-click-click - the mechanic's got more work to do
let's have a look at teaching and what the modern indexing bikes are about.
The modern indexing bike is a wonder.
You pedal, you push this lever, it goes tick tick, it moves up one two or three as you like.
Everything seems good - it is good -
but for the mechanic, setting the limits can be tricky
because the indexing feature can hide limit screw problems.
everything here seems just fine under indexing,
but let's go back to our fiction mode.
We're going to simulate that here by actually pulling the cable. We're not going to use the shifter.
So here, a good system with exposed cable was to pull it.
So we could teach by pulling pulling pulling and...
Let's do a repeat.
That should scare every mechanic out there.
Up and over into the spokes, that's about to twist and rip that off.
But it didn't do it on indexing - because you're not forcing it all the way.
So with the exposed cable system again we could simulate the friction just by pulling.
That's a fine way to do it. We didn't teach that though, did we?
That's because of the cable systems that are changing.
We are seeing more and more of this: housing all the way
solid housing all the way up into the frame and then out.
There is no cable to pull here.
So the teaching techniques before don't really work here.
So in a video we need to have something that works for everybody - that's why we're a little bit different.
We set our H limit
We then actually set the indexing
then we're going to set that L limit afterwards,
pushing on that lever to see if it's too loose.
So the nature of bikes have changed, the nature of teaching has changed,
and the order in which we do things we've had to shuffle that around for you, our viewing audience.
and we hope that that helps and we'll continue to do this and think things through as we go on,
on here, the thinking person's channel, Park Tool.
Thanks for watching.
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