chain length

in Workshop
I bought a Ridgeback three6five last year..It has come with a 118 link chain...but the spec on their website specifies a KMC X10....which are...I believe 116 links......When the other one shows signs of wear.could I fit one of these.?...with no detriment to the existing rear derailleur and rear cassette?
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Posts
Don't measure it on the carpet.
And changing the chain before it's stretched too much will stop excess wear on your cassette. A chain measuring tool is worth having.
I would buy two chains and splice them together and join with two missing links or go to a bike shop, sometimes they buy chains in one continuous length on a reel and they could supply in any size.