Fumps technical (Probably daft) Questions

[fumps]

Hello
I am going to overhaul my drivechain but unsure of details:

 
Got a new rear Mech(SLX long cage), will be getting a cassett (9Sp), Chain (Sram) & Shifter (SLX) (Also will be replacing the cables). But it's my first time to do this so need to ask a few basic questions. So here goes:

Can i mix a Sram cassette with a Shimano mech ?

Is there anything i should be looking out for when selecting the correct Cassette?
(I only run two cogs at the front (granny & Mid) I'm guessing this should be a factor.

Is it a good idea to change the BB while i'm at it ?

Should i bother with the front cogs as well or do you believe they will be fine ?

THink thats everything.

[Ibbo]

You can mix cassettes and mechs and chains,its mechs and shifters that don't usual work together.If you have Hope hubs they,IIRC, need the lighter cassettes with a spider,which are more expensive.Like this:

If the front chainrings look worn and have "Shark-finned"  or have been on for  5 or 6 chains replace them.(If you change everything else and you get chain slip then the front rings will definitely need doing).
If the BB is running OK leave it.

[fumps]

cheers mate

it's appreciated

[sam264]

yep i can only really echo what ibbo said, you're fine to mix cassette/chain/mech etc (i'm running LX shifter, XT mech, SRAM cassette and KMC chain), as long as the mech and shifter are the same brand it should be fine (a lot of people mix front mech and shifters up, i guess it's just rear mech and shifter that matters).

As for chainrings, if yours is starting to look a little hooked then yeah, time to change, especially if it skips when you pedal. You might find you only need to change the middle ring though if you use that most

[stuartw]

>Can i mix a Sram cassette with a Shimano mech ?

Yes.

>Is there anything i should be looking out for when selecting the correct Cassette?

an 11-34.

If i'm changing cassette i change rings and chain too. Cassettes are so pricey now they need protecting.

You may find some new deore shifters and new chainrings (attached to a cheap crank) on the classifieds.

[sam264]

A quick note, i got a SRAM cassette (PG70 i think?) for about half what CRC wanted, brand new from a shop on ebay.

[carlos-g]

Gav , when you get it all bring it round to mine and I'll talk you through it (i.e. you fit it! )

[fumps]

You may find some new deore shifters and new chainrings (attached to a cheap crank) on the classifieds.

lol yeh mate i was thinking about taking the chainrings as well. i think i am ok for now, but let me get back to you with them lol knowing my luck i will end up doing them as well. I dont need the shifters as i already have Deores.
i'm also dropping hints to the other half that new shocks would be good for her lol.

Gav , when you get it all bring it round to mine and I'll talk you through it (i.e. you fit it! )

Yeh mate cheers for the offer of help. your a top gent.

So what i'm planning on is to replace:
The Cassette
The rear mech
Chain
All gear cables
Was also considering upgrading the rear shifter to a SLX, would this be worth it ? they are going for £23 on CRC.

[Hamish]

Upgrading the rear mech will make very little difference, if any. There's pretty much no point in replacing it unless you break it.

I've actually downgraded that rear mech on one of my bikes and haven't noticed any difference whatsoever. Keeping the cables working properly is more important.

[fumps]

Yeh i'm replacing the rear mech becasue the Deore i have is bent (Pretty buggered to be honest)

[fumps]

Ok so am i barking up the right tree ?

Cassette (roughly my budget, thats why i picked this one)
http://www.chainreactioncycles.com/Models.aspx?ModelID=31059

Shifter (I have a SLX shifter so was thinking of just upgrading that while i was at it)
http://www.chainreactioncycles.com/Models.aspx?ModelID=28034

Cables are much the same anyway, Edingburgh Bike co-op usually cut their workshop cables for me when i nip over, so that will be a min operation.

[thekickingmule]

I think that cassette is the one I have on me HT. It's ok, it's done a few hundred miles and I think wear is a bit visible now, so don't expect it to last too long, but it's not bad at all really.

[fumps]

I think that cassette is the one I have on me HT. It's ok, it's done a few hundred miles and I think wear is a bit visible now, so don't expect it to last too long, but it's not bad at all really.

Cool thats what i wanted to hear/read....by the way young man do you still have that rear wheel ?

[thekickingmule]

The one I bought off you? Yeah, I'm replacing the bearings in it tonight as they're well and truely knackered lol. Or do you mean the old 7sp one I replaced?

[fumps]

lol yeh just wondering how it was doing ?