Pompe à Main CO2 ZEFAL CO2 EZ MAX FC + Cartouche CO2 FIletée 16 g (x1) Pneu Rigide Sizes Chest Measurement Waist Measurement Their robust and ergonomic Sizes Chest Measurement Waist Measurement XS 89 94cm 74 79cm S 94 99cm 79 84cm M 99 104cm 84 89cm L 104 109cm 89 94cm XL 109 114cm 94 99cm XXL 114 119cm 99 104cm XXXL 119 124cm 104 109cm Measure your chest circumference by passing the tape measure under the armpits and over the upper chest The two lateral channels covered with a perforated layer allow it to maintain its aerodynamics while letting air pass through perfectly according to your preference Consult the usage chart to select the right cartridge size suited to your tyres and discover the maximum achievable pressure