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)

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General Information










There are two types of balancing, static - and dynamic. Static balance is the equal distribution of weight around the wheel. Wheels which are statically unbalanced cause a bouncing action called wheel tramp. This may eventually cause uneven tire wear.

Dynamic balance is the equal distribution of weight on each side of the centerline such that when the wheel and tire spin, there is no tendency for it to move from side to side. Dynamic unbalance may cause wheel shimmy.