C456 to 1x10 what do I need to stop my chain flying off?

Astrozombies!
Astrozombies! Posts: 55
edited December 2012 in MTB buying advice
Currently running hollowtechII cranks with bash in place of outer ring. Want to ditch front mech and granny ring and run 1x10 instead but not sure what I need to stop the chain jumping off given that the front mech won't be there anymore. Any advice appreciated,

Rob

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