Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Brake Rotor/Disc

Nominal Thickness 1.25 Inch (in)
Minimum Allowable Thickness 1.18 Inch (in)
Maximum Variation (Parallelism) 0.0007 Inch (in)
Lateral Runout 0.003 Inch (in)
Rotor Surface Finish 15 To 80 Micro-Inches (micro-in)