The tire of my bicycle has the size printed as “40-622 (700x38C)”. All the websites I've seen so far say that 700x38C is equivalent to 38-622. What does this mean, and what
Trekking Speed Hybrid Bike Tyre 700x38 BTWIN - Decathlon
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700 x 38 C 40 - 622 Pair HYBRID BIKE TYRES TYRE Black
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700 x 38 C 40 - 622 Pair Cream HYBRID BIKE TYRES TYRE