Tip Clearance

Measure the tip clearance of rotors. If the clearance is out of standard, replace the rotors as a set.

Tip clearance between inner and outer rotors: 

Standard 

0.04 - 0.14 mm (0.0016 - 0.0055 in) 

Fig 1: Identifying Clearance Between Inner And Outer Rotors

Courtesy of SUBARU OF AMERICA, INC.