A lot of people are under the impression that it’s difficult, or even impossible, to repair tears or holes that are situated next to stems on inner tubes. The reality is that these can be patched just as well as punctures on other parts of the tube, and you can get the job done in just a couple of minutes. Take a look at the technique below, and see how it can help you to get some extra mileage out of a damaged tube.
Getting Started
The first step, and this is important, is to thoroughly clean the area around the puncture. Dirt, particles, grime and grease all coat the surface and prevent patches from adhering properly. Wash the area with some soapy water, or use a cleansing wipe, to remove debris before letting it completely dry. The next step is to locate the tear or puncture and determine if your patch is big enough to cover it. If not, then you’ll either need a second patch or you may end up having to replace the tube after all. However, it’s best to know before you go through all of the steps and end up wasting patches in the process.
Once you’ve determined that the tube can be repaired, the next step is to remove the cover from the stem and unscrew any adapter that may be attached. Next, poke a hole in the patch, near the center, that’s just big enough to fit the stem through. You can also slightly-offset the hole from the center in order to have the patch cover a wider area on either side of the tube as well.
Applying the Patch
Next, slide the patch over the tube and position it just above the tear and surrounding area. Apply a generous amount of repair compound to the area along with the base of the stem. Next, angle the tube in the direction of the tear and apply gentle pressure to close up the hole as much as possible. Slide down the patch, make sure that it is well-seated all around, and apply consistent and firm pressure until the sealant has set.
If you have a patch with adhesive backing, don’t remove the protective sheeting until you’ve positioned the patch and you’re ready to press it in place. This way, you can minimize the chances of the sticky side attaching in the wrong spot, wrinkling up, or forcing you to pull it off and start over. Press and hold the patch in place for about 30 seconds, firmly rubbing or squeezing the area, in order to create a strong adhesive bond.
Improvise and Test
If you don’t have a patch repair kit with you, try using duct tape as an alternative. Follow the same steps above, and add a couple of extra strips around the sides of the main one to help make it more secure. While it may not be as effective as a regular patch, it can slow or stop leaks long enough for you to get back to civilization and make proper repairs.
Once the patch or tape has set, test it by inflating the tube and listening for any leaks. You can also do the soap test (if the patch is waterproof) to check for the presence of air bubbles. Reassemble your tire when finished, and you’re good to go.
Remember this technique the next time you are out riding, and don’t forget to bring along an emergency repair kit as well. If you do get into trouble, this simple fix can save you a lot of hassles and get you back on your way in a matter of minutes.