Dunlop recommends the following for rear tire size usage:
100/90-19 rear for 125cc two-strokes, 250cc four strokes
110/80-19 rear for 125cc two-strokes, 250cc four strokes with 2.15 rim
110/90-19 rear for 250cc two-strokes
120/80-19 rear for 250cc two-stroke and 450F four-strokes
110/90-18 rears for 250cc four-stroke woods/trails off road use
120/90-18 rear for 450cc four-stroke woods/trails off road use
PRO SUPERCROSS RACE:
Feb 13 - Houston TX, Reliant Stadium AMA Supercross Round 6
Typical conditions: Mostly hard packed. Last year they brought in some sand.
Front tire: MX71 90/100-21 with tire pressure of 11 PSI
Rear tire: MX71 with tire pressure of 10.5 PSI
Support: Dunlop Service Vehicle support, see Brian Fleck
Geomax MX51 & MX71 Tire Recommendation for 95% of the Supercross venues.
PRO/AM ARENACROSS RACES:
Feb 11-13 - Louisville KY, Freedom Hall AMA Arenacross Round 6
Front tire: MX71 or MX51 80/100-21 with tire pressure of 11 PSI
Rear tire: MX71 or MX51 with tire pressure of 10.5
Geomax MX51 is the Tire Recommendation for 90% of Arenacross venues.
Off Road/Enurdo:
Feb 13 - Spangler Hills - Ridgecrest CA, AMA West Hare Scrambles Round 2
Front tire: MX71F or MX51F 90/100-21 with tire pressure of 13 PSI
Rear tire: MX51 with tire pressure of 14 PSI
