Height does not choose tire size directly
A tire size is picked by your wheel, and your wheel is determined by the bike. Height influences which bike you should buy, and that bike comes with a wheel size. So the question is usually “what wheel size suits my height?” and then “what tire width suits my riding?”. Frame size and tire size are separate decisions.
Kids’ wheel sizes by height
For children, wheel size follows height and inseam (see also kids bike wheel size by age). The ranges below are approximate and vary by brand, so use them as a starting point and let the child’s standover height and comfort decide.
| Wheel size | Approximate child height |
|---|---|
| 12 inch | about 85 to 100 cm (roughly 2 ft 9 in to 3 ft 3 in) |
| 16 inch | about 100 to 115 cm |
| 20 inch | about 115 to 130 cm |
| 24 inch | about 130 to 150 cm |
| 26 inch or larger | above about 145 cm |
Bead seat diameters for these sizes are in the bike tire size chart.
Adult riders and wheel size
Most adult bikes use 700c, 29 inch, 650b or 27.5 inch wheels (see bike wheel sizes by rider height). Taller riders are usually fine on any of them. Shorter riders sometimes prefer 650b or 26 inch wheels on smaller frames, because smaller wheels help avoid toe overlap on small frames. Many small frames are already built with the right wheel size, so choose the bike by fit first. See 650b tires and what 700c means for the main options.
Frame size vs tire size
Frame size (for example small, medium or 54 cm) is about reach and standover. Tire size is about wheel diameter and width. Changing your tire width does not change how the bike fits you much, though a significantly larger wheel size does change geometry. For fit, a bike shop or a manufacturer size chart is a better guide than a tire chart.
Tire width by riding style
Width choices usually follow where you ride, not how tall you are.
- Road: roughly 25 to 32 mm
- Hybrid or commuter: roughly 28 to 45 mm
- Gravel: roughly 35 to 50 mm
- Mountain: roughly 2.1 to 2.6 inches
- Fat bike: roughly 3.8 to 5 inches
Heavier riders may want wider tires for volume. Check your frame limits before going wider.
Fat bike widths
The typical width of a fat bike tire runs from roughly 3.8 to 5 inches, commonly on a 26 inch (559 mm) bead seat, though other rim sizes exist. Be sure to check the actual rim and frame, and see fat bike tire sizes for a fuller chart.
What does ETRTO mean?
ETRTO stands for the European Tyre and Rim Technical Organisation. Its sizing prints tire width and rim diameter in millimeters, such as 47-559. Learn more in bike tire sizes explained.
Practical steps
- Pick the bike by fit, then note the wheel size it uses.
- Read the existing tire size on the sidewall, or measure it.
- Choose a width that suits your riding and frame clearance.