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Yesterday I did a video on how to replace a freewheel and I am going to continue in that vein.
This is my tri racing bike.
It's a Jamis Comet. I've done three Ironmans on it.
Anyway, the weather's getting nice so I am going to get it ready to
go off and do some rides. I wanna go ahead and replace the
cassette on there. So I am going to do a video on how to replace a cassette.
It's a little bit different than a freewheel.
So I am gonna go ahead and pull
the wheel off of here. What I am going to be doing is removing
this cassette which is geared a little higher,
awhich is great for like flat terrain.
And I have another cassette here which has
larger cogs on it and is better suited to the hilly terrain where I live and train.
So I wanna start off by removing
the skewer here. So
just unscrew this here. Take the spring off. Don't lose the spring.
Pull the skewer out from the other side here.
Put it together so I don't lose it.
Put this aside. Then you are going to need
a cassette lock ring remover. This is from Pedros. You can get it from Park
Tool. They make one as well. What it's going to do
is, it's going to fit right into here and there's these little splines here
that are going to mesh up with these all splines on this little lock ring here.
So just fit that in there and you're also going to need
like a chain whip tool to hold the
cassette in place. So put that on there
hold that there. And then with just
a common adjustable wrench, I am going to put this on here like this.
And then turn this counterclockwise
to loosen this little lock ring on the top here.
And at that point I can go ahead and just
remove this little lock ring. So there's just a lock ring that like threads on to there.
And then at this point I go ahead pull this off.
And then the rest of this cassette
should just slide right off all as one unit.
And you want to be careful to check to see if there's any
little spacers and pull that out
as well. So I've got the spacer there. Now one of the things I like to do
is I'll take a zip tie, I'll put it through the whole thing,
including all the spacers and everything like that. Zip tie it together.
That way it keeps all the parts together and also keeps them
all in the proper order. It just makes it easier
so you don't lose anything and it makes it easier when you go to put it back on.
The difference between a cassette freewheel is
a freewheel actually has the bearings and the ratcheting system
all built into the gearing system here. So it's all built into this unit
here.
A cassette is just
gears thay go on there. There's no bearings.
There's no ratcheting system built into the cassette.
That's all in this little part here called a freehub.
So this freehub can turn freely
back that direction. But then it has little pawls in there which catch it so
that it won't turn in this direction. It will grab the wheel and turn the wheel.
So this is called the freehub. So
to install the cassette onto the freehub.
Get this apart here. Then
install it all back on in the order they came off. There's a little spacer here.
So I am going to slide this little spacer on. And...
On the freehub
there's little splines.
and the splines are...have
mostly evenly spaced noches here.
Except there's a wide notch here.
And then one of the splines is narrower here. So
what that does, it allows
the
cogs to only go on in one position.
And so that allows the indexing to be...
the shifting to all be nice and crisp because all the
teeth line up how they're supposed to be. So you wanna do is locate
the wide little tooth on there,
and match that up with the wide notch on there.
It's going to go on there like this.
Then go to the next one, find the wide...
it will only go there...They are generally designed so they will only go on one way. So this will go
on this way.
But I flip it over and I've got that wide
tooth lined up with the wide notch in there and it won't go on. So it will only go on
the one way.
Now the spacers, there are spacers between a lot of these.
They'll go on in any position. So you can turn them around. It doesn't matter...
you know, how they go on. And so go on to the next
cog. Spacer.
And find a wide
tooth there. And
this. And each the the cogs gets progressively smaller.
And then another spacer.
There. And then these ones here actually have to sort of a spacer built into them.
And that goes on there. And then find the wide notch on there.
And that goes on like that.
Then at this point I can go ahead and take
the little lock ring
and screw that on.
Take the tool
and just kind of turn this on.
This doesn't need to be super tight on there
Just kind of turn it
like that. It's got sort of a lock ring on there so you can kind of feel
little
vibrations, little bumps as you're turning that in there.
So that little lock washers gonna hold that
on there nice and tight. So then go ahead and remove the tool.
Reinstall the skewer. The lever's gonna go on the side opposite of
the cassette. And you wanna make sure that you have springs on
both sides. So slide this up here like this.
And the spring goes on this side and then you get this little
nut on there. Now I'll reinstall the wheel.
On a tri bike...on a road bike they kind of install
sort of from the front. This one sort of installs from the back.
So pull this chain back here.
Get it onto the smallest cog which is where it was before I pulled wheel off.
Get it lined up in here.
Get the axle into these notches down here.
Tighten this up.
Clamp the wheel on.
Okay, give it a quick test. Spin it around there.
And it's working good. Anyway, that's how to install a cassette.
So my bike's all ready to do some riding here when the weather warms up.
Do some training on some hills. It will be a lot of fun.
If you like the video, if you found it useful, or interesting,
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And thanks for watching!