A question about cassettes

[SexyGreyFox]

The cassette on my bike is a Shimano HG20-9 11-34, 9 speed, could I replace it with a Shimano HG300 9 Speed Cassette 11-32T?

 

[SexyGreyFox]

So should this cassette also be a direct replacement - http://www.halfords.com/cycling/bik...ain-cables/sram-pg-950-9-speed-cassette-11-32

What is the difference between 32 and 34?
Probably nothing for my commute.

 

[SexyGreyFox]

Thanks for that.
The main reason for my question is that my gears keep missing and no matter what I do they keep jumping and my mate looked at my cassette and said it was my problem.
This evening I've given it a good scrubbing with a metal brush and it looks great and I also cleaned and oiled my rear derailleur.
I then looked at my cable and I think that's the problem, it was very hard to move in the shielding so I've bought another cable.

I also found another problem which wasn't there on Wednesday Oh my God

They are Schwalbe Silento's, I've had them for four years and they cost me £25 each. Halfords are selling them for £11.

 

[SexyGreyFox]

That looks nasty.

4 years though, i'm not sure I've ever had a tyre 4 years!

I rotate 3 bikes depending on the time of year.

 

[SexyGreyFox]

I changed the chain last week and a mate said to change the cassette at the same time since they've both been on for 5 years.
I've just changed the cable and the old one was a struggle to get out of the sheaf down by the rear derailleur so that was a problem.
I'm still not indexing properly so I'm going to get a cassette.

 

[SexyGreyFox]

The cable is sorted and I've bought the SRAM cassette but not fitted yet.

My problem is that my indexing looks textbook compared to You Tube videos and I have setup gears on at least 10 bikes multiple times with no problem.
What happens is that it all looks great on my stand but when I get on the bike they start slipping but never fall to the lower gear.
It may be a lot better now because my last 50 yard ride out of my gate wasn't too bad but I got too cold and fed up to carry on so I'll adjust on my way to work.
I'll put the cassette on when I get in tomorrow.

 

[SexyGreyFox]

H end stop set up right? With the cable not clamped down, and using your left hand, pushng and letting go of the rear mech whilst pedalling does it fall back to smallest, and push up to largest, and neither case go to far and derail onto spokes or between frame?

That's bang on

Slipping as in the chain slips on the cassette teeth or its trying to go up/down a cog and isn't getting there? Always in a certain gear or across the range?

Definitely the chain/cassette and not the freehub slipping?

It feels like both, slipping on the cassette teeth but as though it wants to go down a gear but doesn't. The Freehub is solid.

Check if the mech hanger isn't bent. At at H end stop position, it's a straight line between the sprocket and jockey wheels.

This needs checking because I did go down on my right side on black ice on November 7th BUT this problem didn't start until about 4 weeks ago!

 

[SexyGreyFox]

I'd replace inners and outers for the rear derailleur. Or at least blast GT-85 down the outers and see how freely a inner cable moves back and forth through each outer section.

The cable moves freely, I replaced it this morning and the old one was hard to take out by the derailleur.
I did post that up above.

 

[SexyGreyFox]

Your chain could also well be causing this. Have you checked link wear on it?

I changed the chain last week.

Had an exciting evening yesterday trying to get the old cassette off and ended up breaking the chain whip and falling head first into the door frame. I went to Halfords to buy a better one and the guys said they would remove it for me but they spent 15 minutes so no wonder I had a problem.

Anyway, new cassette on and I got to work and back with no problems