0
Arm to secure the frame of the bike to the structure of the bike rack. Bike Block Pro S2 is the arm for the bike 2nd away from the vehicle on the bike rack when fitted with 4 bikes. This is usually the one to purchase when upgrading your bike rack from a 2 bike carrier to fit a 3rd bike and this new 'S' bike blocks have easier access for the securing knob.
Both ends of the arm provide 360 degree rotation so it can be angled to suit the bike and bike rack.
Clamps to bike carrier frames from 28mm to 35mm diameter and grips both round and oval bike tubes with diameter from 25mm to 100mm.