Some chain/cassette help please

[lozcs]

Hi,

I'm after some advice please...

I've only taken up cycling 3 months ago on an old hybrid bike I was given. It must be 15 years old but looks well maintained / little used.

I've ridden nearly 600 miles but in the last few days the gears have started to slip - one time nearly had me off!! I guess the chain is way overdue replacement and has taken out the back cassette. Also noticed one of the teeth on the front middle ring has a huge crack in it.

Anyway, reasonably confident in doing the job after doing a bit of youtube research but haven't a clue what parts to buy.

The Bike is a Ridgeback Adventure 501 GS

The crankset has "Shimano dual SIS precision index shifting front and rear" written on it it has three cogs

The cassette has MFTZ07 written on it - 7 speed

So....

I guess I need the following....

cassette
chain (haven't a clue!)
lockring tool / chain whip
crankset

Can anyone help me write my shopping list - recommend any other specialist tools I'll need please?


Thanks,


Lawrence.......

 

[HLaB]

On a bike of that age rather than a cassette, it might be a freewheel but I'm no expert and I can't recall how that effects things.

 

[lozcs]

On a bike of that age rather than a cassette, it might be a freewheel but I'm no expert and I can't recall how that effects things.

you're right does appear to be freewheel - although I've no idea what the difference is..


I've just found this on ebay..

http://www.ebay.co.uk/itm/Shimano-M...sure_cycling_bikeparts_SR&hash=item35b52511fb

That would be OK?

 

[lozcs]

I've no idea what the difference is..

This explains nicely..

http://www.sheldonbrown.com/free-k7.html

Thanks for pointing that out...

 

[Zoiders]

The "crack" in the front chain ring

Pressed steel rings, the ramps and pins that help gear shifting are stamped in by machine so the crack you can see is a cut out that's meant to be there.

Unless it's gone shark finned in shape at the teeth leave it as it is.

 

[lozcs]

The "crack" in the front chain ring

Pressed steel rings, the ramps and pins that help gear shifting are stamped in by machine so the crack you can see is a cut out that's meant to be there.

Unless it's gone shark finned in shape at the teeth leave it as it is.

Definitely needs replacing! Just need help what with what with!

 

[lozcs]

http://www.ebay.co.u...=item35b52511fb

I've bought this - still need help with what crank to buy..

Anyone???

 

[Angelfishsolo]

I am guessing a square taper touring chainset - like this. You will also need an Crank extractor tool such as this

 

[HLaB]

you're right does appear to be freewheel - although I've no idea what the difference is..


I've just found this on ebay..

http://www.ebay.co.u...=item35b52511fb

That would be OK?

I think so, but I'm no expert.

 

[lozcs]

OK, Thanks for the help everyone...

I've bought....

Crank
Crank extractor tool
Freewheel tool
Chain splitter
Freewheel
Chain

Hopefully I've got everything I'll need, I'll manage OK and all will fit!

Lawrence......

 

[RecordAceFromNew]

OK, Thanks for the help everyone...

I've bought....

Crank
Crank extractor tool
Freewheel tool
Chain splitter
Freewheel
Chain

Hopefully I've got everything I'll need, I'll manage OK and all will fit!

Lawrence......

A common issue about crank replacement, is that the new one must be compatible with your existing bottom bracket unless you are buying a new matching bottom bracket with the new crank. Assuming they are both JIS square tapered (which is likely in your case), the outstanding issue is the spindle length - too short and the new crank might clash with the frame and/or the front mech bottoms out before you can get into the low gear, too long and the front mech might not be able to reach the outer rings. Usually you can figure out if you have the precise make/model codes of the cranks.

Regarding the dent in your photo of the crank, it is hard to be certain just from that photo, but there is a possibility that it is one of those indents stamped on steel rings (usually cast and only visible from the other side for alloy rings) to assist shifting - but if so there should be more than one around the same ring.

 

[Zoiders]

It's a tourney chainset from the around turn of the century and the dent is meant to be there.

The smallest ring has been ridden into the ground, riding everywhere in the granny ring speeds up wear as the ring has to be spun far more many times than a larger one to ride at any speed, the upper two look like they have plenty of life in them and you can get away with just the top two rings for most uses.

 

[lozcs]

Yeah, after comments on here was unseure about the 'crack' but it is well worn anyway.

I have bought one of these - I didn't get a bracket but if it doesn't fit the one already I've got the model number I need from the PDF that will fit.


Lawrence......

 

[lozcs]

All the bits arrive this morning, managed to switch over everything OK!

Thanks all for your advice...

One quick noob question to put my mind at ease...

Are the chains reversable - do they need to go on a certain way round? /hides


Lawrence......

 

[chillyuk]

Lawrence, I have an identical bike and have done several thousand miles on it without trouble. The only think I have done from standard is to fit a sealed bottom bracket. It is a nice comfy bike for a heavyweight rider.

When you need any parts Ebay is your friend for getting them.

By the way, it doesn't matter which way your chain goes.