Polaris 2011 GEM Owner's Manual page 97

Operation and Maintenance
R
WARNING
Do not use a tire, wheel size or rating other than that specified for your vehicle.
Some combinations of unapproved tires and wheels may change suspension dimen-
sions and performance characteristics, resulting in changes to steering, handling,
and braking of your vehicle. This can cause unpredictable handling and suspension
failure. You could lose control and have an accident resulting in serious injury or
death. Use only the tire and wheel sizes with load ratings approved for your vehicle.
GEM Owner's Manual - Page 96