Bicycle size guide

The right size means comfort, safety and better performance. Enter a height and we will give you the wheel and frame size.

Size calculator

Measure barefoot from the floor to your crotch. It gives a more accurate result.

Size charts

Kids bike sizes (by height and age)
Wheel sizeSuitable rider heightSuitable age range
12"85 – 100 cm2 – 4 years
14"95 – 110 cm3 – 5 years
16"105 – 120 cm4 – 6 years
18"112 – 127 cm5 – 7 years
20"120 – 135 cm6 – 9 years
24"135 – 150 cm8 – 12 years
26"145 – 165 cm11 – 99 years
Adult frame sizes (mountain and hybrid)
Frame sizeSuitable rider heightWheel size
13–14" (XS)148 – 158 cm26"
15–16" (S)158 – 168 cm26"
17–18" (M)168 – 178 cm27.5"
19–20" (L)178 – 185 cm29"
21–22" (XL)185 – 195 cm29"
23+" (XXL)195 – 210 cm29"
Road bike frame sizes
Frame sizeSuitable rider heightAll
0 cm150 – 160 cmXS
0 cm160 – 168 cmS
0 cm168 – 175 cmM
0 cm175 – 183 cmL
0 cm183 – 190 cmXL
0 cm190 – 210 cmXXL
Wheel and tyre sizes (ETRTO)
Wheel sizeISO / ETRTOProduct details
12"203 — 12½ × 2¼Kids 2–4 years
14"254 — 14 × 1.75Kids 3–5 years
16"305 — 16 × 1.75Kids 4–6 years
18"355 — 18 × 1.75Kids 5–7 years
20"406 — 20 × 1.95Kids 6–9, BMX and folding bikes
24"507 — 24 × 1.95Kids 8–12 years
26"559 — 26 × 1.95Classic mountain and hybrid — the most common size in Egypt
27.5"584 — 27.5 × 2.10Modern mountain bikes (also called 650B)
29"622 — 29 × 2.20Long-distance mountain bikes — same diameter as 700C
700C622 — 700 × 25 / 700 × 35Road and fast hybrid bikes
Recommended tyre pressure
BikesPSIBAR
Kids 12–16 inch25–401.7–2.8
Kids 20–24 inch30–502.1–3.4
Mountain, wide tyre (2.0"+)28–401.9–2.8
Hybrid (35–42 mm)50–703.4–4.8
Road (23–28 mm)80–1105.5–7.6
BMX (20 inch)40–702.8–4.8
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