Instructables

How To Patch a Front Tire Presta Valve Bicycle Tube

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Picture of How To Patch a Front Tire Presta Valve Bicycle Tube

These instructions will help the reader patch a punctured presta valve tube for the front tire of their bicycle. You will first learn how to remove the tire and tube in order to inspect it for holes. You will then be instructed on how to patch the tube before finally returning the tube and tire to the wheel.

 
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Step 1: Items Needed

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  • patch kit
  • tire removal tools
  • permanent marker (not black)
  • pump

Step 2: Definition of Terms

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Step 3: Removing the Tire/Tube

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1. Flip your bike upside down so that it rests on the seat and handlebars

2. Pull quick release lever into a horizontal position, then loosen the tire by holding the quick release cap in place and turning the quick release lever counter clockwise

3. Unattach the brakes by locating the brake latch below the tire, pulling the rubber back, pushing the two sides together and lifting metal piece off

4. Lift wheel off of suspension fork

5. Unscrew the black plastic cap from the air valve, and loosen the metal top until you can depress it; release the air from the tube by depressing the air valve until the tire can be flattened against the ground.

6. Remove the lock nut from the air valve

7. Insert bike tire lever tool using the spoon end, push tire towards one side with one hand and with the other use the tool as a lever to pull the tire over the rim sidewall.

8. Fasten the lever tool to the spoke using the hook end.

9. Insert second tool spoon-side under the tire.

10. Hold tire with one hand, hold the unattached tool and pull it towards yourself, continuing around the entire circumference of the tire until the one entire side is outside of the rim sidewall

11. With one side of the tire off, push the air valve up until it comes out of the rim, then pull tube out one side and remove it completely

eryl2 months ago

If you're doing this with narrow road wheels you may find that the tire is hard to pull over the rim. The trick is to pinch the tube on the opposite side to the levers, so that the bead drops into the well of the rim. This means that the tire will move over further. With mountain bike tires this trick can mean that you can remove a tire without levers.
Also when refitting the tyre (especially with narrow rims), don't put on the valve nut until you've pumped up the tire, otherwise the tube may be pinched between the bead of the tire and the rim. The tire will then have a bump in it where it's not seated in the rim properly. With narrow rims you often need to push the valve in slightly to make sure that the tire can seat properly in the rim

Patching tubes can be a saviour in order to get home but by no means are they permanent. You should always put a new tube in as soon as possible.

This is really helpful! My dad also taught me that if you were having a hard time finding a puncture you could slowly rotate the inflated tube through a tub of water and watch for bubbles, but then you have to make sure it's totally dry again before you can patch it and you can't really do that if you get a flat on the side of the road somewhere, unfortuantely.