Wrong chainring?

[Sharky]

Is the chain coming off when pedaling or when you stop pedaling?

If your freehub is sticking, the chain carries on when you stop pedaling and the chain will come off.

 

[Chief Broom]

Did you count the links or measure the length?
Was the old chain worn?
Was the old chain the right length?
Have you checked the chain line?

The old chain only had about 800 miles on it. I laid them out alongside each other removing some links of the new chain to get them exact...something ive done numerous times- it aint the chain!

 

[Chief Broom]

Is the chain coming off when pedaling or when you stop pedaling?

If your freehub is sticking, the chain carries on when you stop pedaling and the chain will come off.

When pedalling

 

[richardfm]

The old chain only had about 800 miles on it. I laid them out alongside each other removing some links of the new chain to get them exact...something ive done numerous times- it aint the chain!

What about the chain line?

 

[Chief Broom]

What about the chain line?

It looks ok

 

[Chief Broom]

Okay dokie put the original chainring back on with the new chain, had a spin round the block no problems whatsoever. So the new chainring has to be at fault-agreed?
So can anyone tell me where i can get a 42 teeth 5 arm 130 bcd, chainring for a 1 x 8 speed, Thanks

 

[Alex321]

Okay dokie put the original chainring back on with the new chain, had a spin round the block no problems whatsoever. So the new chainring has to be at fault-agreed?
So can anyone tell me where i can get a 42 teeth 5 arm 130 bcd, chainring for a 1 x 8 speed, Thanks

https://www.wolftoothcomponents.com...-cyclocross-chainrings?variant=14782015209507

AIUI, 8 & 9 speed chains are the same, so this should do you.

 

[Chief Broom]

https://www.wolftoothcomponents.com...-cyclocross-chainrings?variant=14782015209507

AIUI, 8 & 9 speed chains are the same, so this should do you.

Thanks Alex321 £70 is a bit pricy for me though, think i might try going to a bike shop and they can have the responsibility of getting the right one.

 

[Sharky]

One last thought. The lifting pin that's visible are usually on the big ring of a double chainset and on the inside. That is, facing the frame.

Can you turn the ring round, so the lifting pin is on the inside.

 

[Illaveago]

There isn't much meat left on the teeth on that chainring? To me it looks worn out to start with .

 

[Chief Broom]

One last thought. The lifting pin that's visible are usually on the big ring of a double chainset and on the inside. That is, facing the frame.

Can you turn the ring round, so the lifting pin is on the inside.

Thanks Sharky Is a 'lifting pin' just a rivet and whats its function? When im in a better humour i'll try turning it around-- getting pissed off with which should be a simple job

There isn't much meat left on the teeth on that chainring? To me it looks worn out to start with .

Its brand new bt doesnt look right to me either...certainly wont be using Tredz again.

 

[Alex321]

Thanks Sharky Is a 'lifting pin' just a rivet and whats its function? When im in a better humour i'll try turning it around-- getting pissed off with which should be a simple job

Its brand new bt doesnt look right to me either...certainly wont be using Tredz again.

Tredz are perfectly good, I have used them regularly (Though in my case it helps that one of their 3 shops is only 10 minutes ride from my office).

I don't think it is their fault that the chainring isn't working with your setup.

 

[Venod]

So can anyone tell me where i can get a 42 teeth 5 arm 130 bcd, chainring for a 1 x 8 speed, Thanks

I have an old Shimano silver 42t ring 130 bcd, I can't remember what speed it was used with but the teeth are 2mm so should be OK with a 8 speed chain, it's a little worn but still useable, if you want it PM you address and I will pop it in the post.

 

[Chief Broom]

I have an old Shimano silver 42t ring 130 bcd, I can't remember what speed it was used with but the teeth are 2mm so should be OK with a 8 speed chain, it's a little worn but still useable, if you want it PM you address and I will pop it in the post.

Hi Venod thats very kind of you for the time being i'll try to get a new one but will get back to you if i cant. I emailed Dawes yesterday asking where to get one...cant believe every 8 speed dawes bike comes to an untimely end because their chainrings wear out!

 

[Venod]

There seems to be a lot of chainrings available, just one link I found.

https://www.sprocketandgear.co.uk/p...cfqL8sfX2nlEjGJsg1JuPy-5ja3jKZ8caAnKLEALw_wcB