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 Races:
April 16th         Seattle WA, Qwest Field AMA Supercross Round 15

Typical conditions:  This track is road base dirt. It has a lot of gravel and ruts up quickly.
Front tire:  MX51F 80/100-21 with tire pressure of 11.5 PSI 
Rear tire:  MX51 with tire pressure of 12 PSI 
Support:   Dunlop Service Vehicle support, see Brian Fleck

Pro-AM Motocross (Qualifiers to earn AMA pro status):
April 16 & 17 2011         Golden Pine Raceway,  Prentiss, MS Round 11:

Tire Recommendation:  Dunlop MX51  12 -13 PSI  (601) 506-8669
www.goldenpineraceway.com

Amateur National Races:
April 11-17th        Mesquite NV, Mesquite MX Park NMA World Mini Grand Prix

Typical conditions:  Concrete start pad - Track that gets Tacky to marble hard packed – Lots of rocks
Dunlop Service and Support Vehicle in attendance
Tire Recommendation:  Dunlop MX51 and MX71  12 -13 PSI

Off-Road/Enduro/Hare & Hound:
April 16-17         WEST Hare Scramble Round

Chappie Shasta OHV
Shasta Lake, CA
No Youth classes
Karl Hankins
530-953-7272
info@reddingdirtriders.com
www.reddingdirtriders.com

April 15-17         WORCS Series 

Cahuilla Creek, Anza CA  
Tire Recommendation - Dunlop MX51 and MX71  11.5 -12 PSI

AMA ARENACROSS:
April 9-10         Arenacross Round

Des Moines, IA
Tire Recommendation - Dunlop MX51 and MX71  11.5 -12 PSI