Also - I wouldn't bother with a clutched mech on a TT bike
Not even with a single ring up front?
Seems like the best option as it cures the problem (chain slap), rather than treating the symptoms (N/W ring or a chain guide).
Was assuming you would use a NW ring. I have a feeling clutch mech's may have higher frictional losses than regular mechs as well.
@Scilly.Suffolk started
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Also - I wouldn't bother with a clutched mech on a TT bike