Gear Problem

[MJBiker]

Can you guys please give me advise on buying a cassete, chain and chain ring. I have a 8 speed cassete and shifter

[Bateleur1]

Typically you replace with what you had. If you had shimano on you replace it with shimano.  Some brands are interchangeable but your LBS would be of good assistance.

 

What do you have currently on the bike?

[Spoke101]

looks like you also spend a lot of time down the bottom of your cassette. You might want to change to a bigger chainring in the front in future in order to slow down the wear and tear.

[Odinson]

Those smaller sprockets are toast.

 

Like other said, your chain and chainrings are probably also toast. Replace them all in one go.

[MJBiker]

shimano

[MJBiker]

Typically you replace with what you had. If you had shimano on you replace it with shimano.  Some brands are interchangeable but your LBS would be of good assistance.

 

What do you have currently on the bike?

shimano

[Bateleur1]

shimano

 

You will have to check which Shimano groupset.  It would not surprise me if this is an older model having only 8 gears. I am not clued up on the MTB groupsets in general.

[MJBiker]

You will have to check which Shimano groupset.  It would not surprise me if this is an older model having only 8 gears. I am not clued up on the MTB groupsets in general.

I found out that the person who  built the bike didn't put a shimano in they put a cheap ass cassette in.

[MJBiker]

looks like you also spend a lot of time down the bottom of your cassette. You might want to change to a bigger chainring in the front in future in order to slow down the wear and tear.

Please explain what you mean my chain ring is a 3 speed.

[Joeboy69]

Chainring is the sprockets in front where the pedals are. You can have 1 or 2 or 3 in front

[Spoke101]

Please explain what you mean my chain ring is a 3 speed.

Your Cassette which is the set of Sprockets on the rear wheel is worn out as the gaps between the teeth have become elongated and no longer have a sharp "U" shape.

 

The bottom 3 sprockets on your cassette are very badly worn as they are starting to look like a wave that is about to break/curl over. This tends to indicate that you are spending a lot of time riding in these bottom 3 gears by the amount of wear from the chain spending most of its time running over these sprockets. The low number of teeth and the small size of these sprockets also increases the speed at which these wear out.

 

In order to increase the lifespan of you cassette and in particular the bottom 3 sprockets use a bigger chainring in the front on the crank. In doing so you will also then use a bigger sprocket on the cassette in order to achieve the same gear ratio. The bigger sprockets at the top of the cassette are larger and have more teeth to spread the load of the chain therefore they last longer.

 

General rule of thumb is you want to try keep the chain in as straight a line as possible therefore increasing the life span of the chain.

This can be done by for example: If you in the middle chain ring in the front on the crankset and you in the middle of the cassette at the back riding along a flat road. As the road starts to go downhill and you start to change down the cassette to the smaller sprockets, when you get to the 3rd from the bottom and are about to change to the 2nd from the bottom rather change from the middle chain ring in the front to the big chain ring in the front and then to compensate also change up one or two sprockets on the cassette to the 4th or 5th from the bottom.

 

This rule also applies in reverse when starting to go up hill. So as you start getting to the top of the cassette change down in the front to a smaller chain ring and also change down at the back by one or two gears to ajust for the change in the front.

[johannrissik]

Methinks MJBiker is pulling some chains....

Or maybe not.

[MJBiker]

Thanks hus i Got a new chain and cassette. my gears got aligned and now it rides like a dream better than ever before

[porqui]

MJ  I think you have some reading to do.

 

 

This a good place for starters.    http://www.sheldonbrown.com/articles.html