Shimano’s User Manual has contained the following instructions on how to properly install its quick releases.
■ Important Safety Information
Guidelines that require replacement, contact the place of purchase or a bicycle dealer.
Quick release lever position for rotor compatible hubs
• Install the quick release lever to the rotor as shown in Figure 1 , and then fully push the quick release lever to the CLOSE position and check that it does not interfere with the rotor. If the quick release lever interferes with the rotor, install it on the opposite side to the rotor.
• When the quick release lever is in CLOSE position, the lever should be in parallel position with the fork (refer to Figure 2a ) or face toward back of the bicycle (refer to Figure 2b ) in order to prevent foreign objects such as tree branches from getting stuck during the ride, which can cause the quick release to open and cause the wheel to release unintentionally from the fork.
• Furthermore make sure that the front fork does not interfere with the quick release lever. If the front fork obstructs the quick release lever so that the wheel cannot be secured properly, the wheel may fall off the bicycle during riding and serious injury may occur as a result.