Have I brought the wrong chain or haven't I?

[Welsh wheels]

I recently brought this chain from Tredz https://www.tredz.co.uk/.KMC-X8-93-Chain-116L_43005.htm
Listed under the 6-7-8 speed chains section. My gearing is 50-34 on the front and 11-32 on the back, 8 speed hence why I brought a chain from this section. The picture shows what they have just sent me. Particularly confused by the 18 speed, 21 speed and 24 speed wording on the the bottom left of the packet. The chain was advertised online as being in the 6-7-8 speed section. So does this wording on the packet mean something different? Or have I somehow brought either brought the wrong chain or had the wrong product sent to me?

 

[screenman]

6 7 and 8 across the rear.

 

[glasgowcyclist]

18-21-24 is the total number of gears available if you have a 6-7-8 speed block so just a different way of expressing the same thing.

ETA: that's assuming a triple ring up front, obvs.

 

[Welsh wheels]

I rung Tredz and they told me that I can just remove links to get the chain to the right size, so that should be sorted. Thanks both.

 

[glasgowcyclist]

I rung Tredz and they told me that I can just remove links to get the chain to the right size, so that should be sorted. Thanks both.

Count the number of links on the old chain before you bin it.

 

[Welsh wheels]

Count the number of links on the old chain before you bin it.

Yep will do. A more mechanically minded friend has the requisite tools knowledge and has offered to help me.

 

[Welsh wheels]

18-21-24 is the total number of gears available if you have a 6-7-8 speed block so just a different way of expressing the same thing.

ETA: that's assuming a triple ring up front, obvs.

I have a double chainring up front, so I assume I can still use that chain. Just might need to shorten it.

 

[glasgowcyclist]

I have a double chainring up front, so I assume I can still use that chain. Just might need to shorten it.

You can still use the chain. It doesn't matter whether you have a single, double or triple chainring, what counts is the combination of the biggest chainring and biggest rear sprocket.
Use this calculator to confirm: http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html

 

[mjr]

Yeah, bad labelling by KMC. Again. Most of their chains are pretty good but their marketing department seems a bit

 

[MichaelW2]

Better get it right because that chain looks Extremely Durable.

 

[Ajax Bay]

that chain looks Extremely Durable

I was rather taken with the 'eXtra Stretch Proof' description. I wonder how they support that claim?

 

[chriscross1966]

As someone with an interest in metallurgy and engineering, I'd suggest they'd work-hardened it or some form of temperature treatment....

 

[swee'pea99]

When you take your old chain off, hang it and the new chain from a thin support - a nail or something, then note the link on the new chain that's alongside the lowest link on the old chain. That's where you need to break the new chain. Discard the 'leftover'.

 

[si_c]

Discard the 'leftover'.

Don't do that, keep the excess for practicing chain breaking, or keep a couple of links to use to fix a broken chain if on the road.

 

[roadrash]

@Welsh wheels have you fettled it??