2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 136Get this manual
BRAKES 4Inspect the protective rubber gasket for nicks or other damageReplace if necessaryRubber Gasket 6Inspect the brake shoe pad materialReplace if worn beyond specificationCarefully remove the retainer springs and brake shoes from the backing plate
= In mmRear Brake Shoe Pad Thickness: Service Limit: 0.08" (2 mm) 7Inspect the backing plate seal and brake cam for excessive wear or damageReplace if necessary