something slipping

chatlow
chatlow Posts: 845
edited June 2015 in Workshop
Scott S20 i use for commuting. Only a 5 mile ride to and from work, but during this something slips/clunks but usually only once during the ride. Sometimes only when slight pressure on cranks, other times when hard pressure.

Feels like slight chainring/chain slip. Chain and cassette only one month old. Chainrings are about 3. Don't look worn at all.

Any ideas what I should look at to fix?

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