Chain length

[besso]

If I change from a 11/23 casette to a 11/21 casette do I shorten my chain and will it be necessary to adjust the gear settings? Thanks

[Tankman]

no and no

[Andyr249]

Not for that range.

 

But why do you want to go from an 11-23 to an 11-21? No sense to do that as you will struggle on the hills.

[Pomstar]

A 11-21 Casette is an awsome ratio because of the 18T sprocket. Its in the perfect place when rideing a steep drag or even up a mountain pass. I currently ride a 11-23 because i refuse to spend that amount of money on a Record casette. That gap between the 17T and 19T can iether be to big a gear or to small a gear.... I'm sure you know what i'm talking about if youre getting that ratio.

[Andyr249]

An 18 on a mountain pass? Clearly there aren't any proper mountains around Klerksdorp!

[Hector]

Agree that you dont have to change your chain length for sucxch a small difference.

Just for info, the correct chain length is as follows:

1.Remove the old chain.

2.Shift the front derailleur over the largest chainring, and the rear derailleur on the smallest cog.

3.Thread the new chain through the front derailleur. It is not necessary to thread the chain through the rear derailleur at this point. Simply wrap the chain around the largest front chainring and around the largest rear cog.

4.Pull the chain tight, and note the closest rivet where the two could be joined. Keep in mind a chain can only be joined by mating inner and outer plates.

5.From the closet rivet, lengthen the chain by counting over an additional two rivets (two links), which is a distance of one-inch. Cut the chain at this point.

6.Remove the chain from the bike and thread it through both derailleurs and join the ends.

Remember if you are using a mater link, include it in your calculation of 2 links

[besso]

Not for that range.

 

But why do you want to go from an 11-23 to an 11-21? No sense to do that as you will struggle on the hills.

Will use 11-21 for flat races and swop it out for 11-23 when needed. I very seldom use 23T, will use 18T alot more I think.