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Q-tubes is the house brand of one of our favorite distributors, Quality Bicycle Parts. The tubes are high quality, produced by Kenda. They are black rubber with a 32mm Presta Valve. At ~220g/per, they're respectably light. These are for bikes with big wheels -- 29in x 1.9-2.3in.

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Q-Tubes 29in Presta Mountain Tube

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Here's what others have to say...

4 5

Adam D

Member since 
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But not all tubes are created equal. These are the best around, but make sure to check the valve core- some of these can unthread with the wrong pump if their not tight. A quick turn with a spoke wrench will do it.

5 5

Tim Akers

Member since 
  • Familiarity: I've put it through the wringer

I use these tubes in my cross tires. It helps prevent flats when running lower tire pressure because of the thicker tubes. Give it a shot!

4 5

Hap Seliga

Member since 
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  • Familiarity: I've put it through the wringer

Not the heaviest, not the lightest, but well priced. Don't leave home without one.

4 5

Mike Marrow

Member since 
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Work great and kept me from having to walk for miles.