Select Class: -- select -- SJ00B-PRIMARY Riders in years 1-6 SJ01-Primary 50cm - 2 Phase SJ01b-Primary 50cm - AM5 SJ02-Primary 60cm - 2 Phase SJ02b-Primary 60cm - AM5 SJ03-Primary 70cm - 2 Phase SJ03b-Primary 70cm - AM5 SJ06- Intermediate 90cm - 2 Phase SJ06b-Intermediate 90cm - AM5 SJ07-Intermediate 100cm - 2 Phase SJ07b-Intermediate 100cm - AM5 SJ08-Senior 90cm - 2 Phase SJ08b-Senior 90cm - AM5 SJ09-Senior 100cm - 2 Phase SJ09b-Senior 100cm - AM5 SJ10-Secondary Training 60cm - 2 Phase SJ10b-Secondary Training 60cm - AM5 SJ11-Secondary 70cm - 2 Phase SJ11b-Secondary 70cm - AM5 SJ12-Secondary 80cm - 2 Phase SJ12b-Secondary 80cm - AM5 SJ13-Secondary 110cm - 2 Phase SJ13b-Secondary 110cm - AM5 SJ14-Secondary 120cm - 2 Phase SJ14b-Secondary 120cm - AM5