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Martin IN - Gt grade - Gravel bike - Tire size visuel 700x32 vs 700x42 Continental contact speed - YouTube
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Amazon.com : Continental Contact Speed ETRTO (28-406) 20 x 1.1 BW Bike Tires, Black : Sports & Outdoors
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Tire Continental Contact Speed 700 X 32c, 32-622, Chur./chur., Reflex, Safetysystem Breaker-3/180 Tpi-e25, Silver Label - Bicycle Rims - AliExpress
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