You're floored! Repairing a bicycle tube made easy.

Sometimes you just run out of steam!
Driven over a nail, shard of glass or a sharp stone and boom, it happened: there's a hole, a flat tire! This is annoying, but quickly fixed. We explain step by step how it's done.

What you need:

• Open-end wrench
• Coat lifter
• Repair kit
• If necessary, a replacement hose of a suitable size

Reasons for a flat tire
It doesn't always have to be the classic piece of glass that causes a flat bicycle tire. Sometimes extreme heat or a head-on collision with a curb can cause damage to the hose.
Pfffff, air out. But before you throw on the craftsman's outfit, you should first try to inflate the tire.
If this is not possible or the tire immediately loses air, there is probably a hole in the tube.

Step 1: Remove the wheel
As a rule, small holes in the hose can be patched relatively easily.
To do this, the first step is to remove the affected wheel.
To do this, loosen the wheel nuts with an open-end wrench. Depending on the type of brake on your bike, you may have to remove the brake first.
Now you have to remove the valve. To do this, unscrew the union nut and take out the valve. You also have to loosen the nut at the base of the valve pipe. Now use the coat lifters to carefully lift the bike coat off the rim on one side.

Step 2: Patch the hose
If there is “only” one hole, it can be patched relatively easily and the repaired hose can be reinstalled. If this is no longer possible and you want to change the hose completely, you can skip this step and go directly to step 3. Pull the hose out of the jacket and screw the valve back in. Now you have to find the place where the hole is. The easiest way to do this is underwater. To do this, immerse the hose in a container with water and gradually examine the hose. If bubbles appear in one place, then congratulations: That's the leak!
Now dry the area around the hole and roughen it with sandpaper. Then spread the glue for the patch generously all around. Then select a suitable patch, remove the metal foil and press it on firmly. Finally, peel off the plastic film. If you want to test whether the hose is really tight, you can inflate it slightly again and immerse it in the water again.

Step 3: Install hose
Now the hose can be threaded back into the jacket. The easiest way to do this is to start with the valve tube. Then inflate the tube slightly and lift the jacket back onto the rim. Now you can fully inflate the tire and reinstall the wheel.
Et voilà , you're done!

Tip: Most manufacturers provide information about the maximum load and the recommended air pressure on the tire. Most manufacturers also print the size in inches on the tire casing so that you can find the correct tube size if in doubt.