How to Fix a Flat Tire – On-Trail Mountain Bike Repairs | Part 1

How to Fix a Flat Tire – On-Trail Mountain Bike Repairs | Part 1


A flat tire shouldn’t end your ride. Fixing a flat can become second nature with enough practice and some patience. First and foremost you’re going to need the right tools… So make sure you carry tire levers, a pump, a fresh tube or a patch kit. It’s best if you flip your bike upside down when repairing a flat on the trail. If it’s your rear wheel, putting your bike into the smallest chain rings front and rear will make it easier to get in and out. Don’t forget to engage the cage lock on your derailleur if you have the option. Remove the wheel with the flat. Make sure you put your thru-axle in a safe place so it’s not getting covered in dirt, or lost. Once the wheel is off, drain any remaining air out of the tire. Using your tire levers, remove one side of the tire bead from the rim. Remove the damaged tube and inspect your tire and tube for damage. It’s important to know what caused your flat so you can avoid it happening again. Pinch flats will look like a snake bite, while punctures will usually be a singular hole. If it’s a puncture, make sure the item that caused the flat is not stuck in your tire still. Once the tire is cleared of old debris, you can install your new tube. Start by inflating the new tube slightly. Install the tube starting at the valve stem and work around the wheel. If you’re using tubeless tires, you’ll have to remove your tubeless valve stem to install your new tube. Save this valve in your pack to reinstall later. Once the tube is installed around the wheel, you can reinstall the tire to the rim. Starting at the valve stem, push the bead of the tire back over the rim using your thumbs. Most rims will have a center channel. You want to work the bead into this channel as you work your way around the wheel. This will make it easier to get the last part of the tire bead reinstalled to the rim. Once the tire is on, inspect the bead to make sure it’s evenly and properly installed. Inflate your tire using your pump, but be careful not to tear the valve stem during inflation. Make sure the bead of the tire is seating properly to the rim as you inflate. Adjust or remove the bead as needed to get a proper seat. Inflate the tire to pressure and reinstall your wheel. Turn the cage lock on your derailleur and give the bike a couple of pedals to get it into gear. If you have any questions, or would like a demonstration on how to fix a flat… call our Experts at 435-649-4949 or swing into Jans Park Avenue Bike Shop.

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