27 (Recommended 88-99 lbs / 40-45 kg)28 (Recommended 99-116 lbs / 45-52.5 kg)29 (Recommended 110-121 lbs / 50-55 kg)30 (Recommended 121-138 lbs / 55-62.5 kg)31 (Recommended 138-149 lbs / 62.5-67.5 kg)32 (Recommended 149-160 lbs / 67.5-72.5 kg)33 (Recommended 160-171 lbs / 72.5-77.5 kg)34 (Recommended 171-182 lbs / 77.5-82.5 kg)36 (Recommended 182-198 lbs / 82.5-90 kg)