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Bike Tire Sizes Explained: Inches, ISO, ETRTO and 700c
Learn how to read bike tire sizes: what inch, ETRTO and 700c markings mean, why 29 inch and 700c share a rim, and which number decides if a tire fits.
Bike maintenance
Keep it rolling, fix it yourself.
Practical bike maintenance guides: tire sizes and pressure, flats, chain care, gears, brakes, wheel sizing and service, plus fit and comfort.
90 in-depth guides 17 topics Oct 2026 latest guide
Featured guides
Guides to start with
Each one links on to more specific articles in its topic.
Road Bike Tire Sizing: How to Pick the Right Size
Learn how to read road bike tire sizes, what 700c and 622 mean, and how to check width, frame clearance and rim fit before you buy a replacement tire.
Anatomy of a Bike Tire: Every Part Explained
Learn the parts of a bike tire, from casing, bead and tread to puncture protection and sidewall markings, and how each part affects ride, grip and wear.
Bike Tire Pressure Chart: Finding Your PSI
Use this bike tire pressure chart as a starting point for road, hybrid, gravel and mountain bikes, then adjust PSI for your weight, tire width and terrain.
How to Inflate a Bike Tire Properly
Learn how to inflate a bike tire step by step: identify your valve, find a sensible pressure, attach the pump, and check the result with a gauge.
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Tires
Tire sizing, width and fit, tire choice, pressure, inflating and flats.
Tire Sizing 7 guides, starting with Bike Tire Sizes Explained: Inches, ISO, ETRTO and 700c. 7 guides Tire Width & Fit 6 guides, starting with Road Bike Tire Sizing: How to Pick the Right Size. 6 guides Tire Anatomy & Choice 6 guides, starting with Anatomy of a Bike Tire: Every Part Explained. 6 guides Tire Pressure 7 guides, starting with Bike Tire Pressure Chart: Finding Your PSI. 7 guides Inflating Tires 7 guides, starting with How to Inflate a Bike Tire Properly. 7 guides Flat Tires 4 guides, starting with Why Your Bike Tire Keeps Going Flat and How to Stop It. 4 guides
Chains, Gears & Brakes
Chain care and fixes, gears, brake types and brake troubleshooting.
Chain Care 6 guides, starting with How Often Should You Lube a Bike Chain?. 6 guides Chain Fixes 7 guides, starting with Why Your Bike Chain Keeps Coming Off. 7 guides Bike Gears 6 guides, starting with Bike Gears Explained with a Diagram. 6 guides Brake Types & Upgrades 4 guides, starting with Bike Brake Types Compared. 4 guides Brake Troubleshooting 5 guides, starting with How to Adjust Rear Bike Brakes: Rim and Disc Setups. 5 guides
Wheels
Wheel sizing and swaps, wheel parts and building, and wheel service.
Wheel Sizing 6 guides, starting with Bike Wheel Size Chart. 6 guides Wheel Size Swaps 3 guides, starting with Can You Change the Wheel Size on a Bike?. 3 guides Wheel Parts & Building 6 guides, starting with Anatomy of a Bike Wheel: Hub, Spokes, Rim and More. 6 guides Wheel Service 5 guides, starting with How to True a Bike Wheel Without a Spoke Wrench: Step by Step. 5 guides
Basics & Fit
Maintenance basics and bike fit and comfort.