Tension Adjustments - Ossa TR 280i Manuel De L'utilisateur

The transmission chain transmits the engine's movement to the
rear wheel. To ensure that is works correctly, it should be checked.
The axle has easily adjustable eccentrics for tensing
the chain and centring the wheel.
The chain hook should be positioned in an opposite
direction to the gear, as can be seen in the photo.
The chain tension should permit 2 cm of oscillation
in the chain tension adjuster.
Chain – tension adjustments
User manual 39