It's a Downhill 29" tube with auto 40mm length valve. STANDARD - doesn't mean ordinary: quality rubber compound combined with even wall thickness makes ACID tubes reliable and durable. ACID tubes were tested in laboratory!
For 29" wider tires
For tire width (ETRTO size in mm): from 61-622 to 71-622
Valve type: auto (Schrader / AV)
Valve length: 40 mm
MATERIAL: rubber
WEIGHT: 159 g
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