2006-2009 Suzuki LT-Z50 QuadSport ATV Factory Service Manual, Page 31Get this manual
PERIODIC MAINTENANCE
Inspect every monthTIRE TREAD CONDITION Operating the vehicle with excessively worn tires will decrease riding stability and consequently invite dangerous situationIt is highly recommended to replace tire when the remaining depth of the tire tread reaches the following specification09900-20805: Tire depth gauge Service Limit: Tire tread depth: Front 4.0 mm (0.16 in) Rear 4.0 mm (0.16 in) TIRE PRESSURE If the tire pressure is too high or too low, steering will be adversely affected and tire wear will increaseTherefore, maintain the correct tire pressure for good roadability and longer tire lifeCold inflation tire pressure is as followsCold inflation tire pressure: Front: 20 kPa (0.20 kgfcm, 2.9 psi) Rear20 kPa (0.20 kgfcm, 2.9 psi) VEHICLE LOAD CAPACITY LIMIT: 38 kg (84 lbs)