Bike helmets for a 65 cm head
A 65 cm head is 25.6 inches. Of the 53 helmets we track, 9 fit you — and here is the exact size to order in each brand.
9 helmets that fit a 65 cm head
Sorted by price. The size in the third column is the one to order — it is the size whose range is centred closest to 65 cm.
| Brand | Model | Your size | That size covers | Riding | Safety (VT) | Price | |
|---|---|---|---|---|---|---|---|
| Smith | Signal MIPS | XL snug | 61-65 cm (24.1-25.5 in) | Road | ★★★☆☆ 3/5 | ~€68 | View |
| Smith | Convoy MIPS | XL snug | 61-65 cm (24.1-25.5 in) | MTB | Not rated | ~€68 | View |
| Bell | 4Forty MIPS | XL snug | 61-65 cm (24.1-25.5 in) | MTB | Not rated | ~€87 | View |
| Giro | Radix MIPS | XL snug | 63-65 cm (24.9-25.5 in) | MTB | Not rated | ~€87 | View |
| Smith | Persist MIPS | XL snug | 61-65 cm (24.1-25.5 in) | Road | Not rated | ~€109 | View |
| Giro | Syntax MIPS | XL snug | 63-65 cm (24.9-25.5 in) | Road, Gravel | ★★★☆☆ 3/5 | ~€150 | View |
| Trek | Circuit WaveCel | XL | 60-66 cm (23.7-25.9 in) | Road | ★★★★☆ 4/5 | ~€157 | View |
| Trek | Rally WaveCel | XL | 60-66 cm (23.7-25.9 in) | MTB | ★★★★☆ 4/5 | Check price | View |
| Giro | Fixture II MIPS XL | Universal XL snug | 58-65 cm (22.9-25.5 in) | MTB, Urban | Not rated | Check price | View |
7 models are marked “snug”: 65 cm sits in the last 0.75 cm of that size, so the retention dial will be near its limit. It fits, but there is little room to spare.
Want to filter by riding style, budget or a specific model? The finder does all three, starting from your 65 cm.
Open the finder at 65 cmSo close
These models miss 65 cm by less than 1.5 cm. Head shape and padding thickness can swing a fit by roughly that much, so they are worth trying on in a shop — but we will not tell you they fit.
| Brand | Model | Model range | How far off |
|---|---|---|---|
| Lazer | CityZen KinetiCore | 52-64 cm (20.5-25.1 in) | too small by 1.0 cm |
| Lazer | Jackal KinetiCore | 52-64 cm (20.5-25.1 in) | too small by 1.0 cm |
| Lazer | Strada KinetiCore | 52-64 cm (20.5-25.1 in) | too small by 1.0 cm |
| Lazer | Tonic KinetiCore | 52-64 cm (20.5-25.1 in) | too small by 1.0 cm |
| MET | Idolo MIPS | 52-64 cm (20.5-25.1 in) | too small by 1.0 cm |
Is 65 cm a big head?
Yes. 65 cm (25.6 in) is in the top few percent of adult heads, and it is where most brands stop: only 17% of the helmets we track go that far. That is the whole reason this site exists — the founder wears 63 cm and got tired of reading “one size fits all” on helmets that did not.
See also: every helmet we know of for big heads.
Measuring, in one minute
Wrap a tailor's tape (or a piece of string you then measure against a ruler) around your head about 1-2 cm above the eyebrows and above the ears — the widest part. Keep it level and snug, not tight. If you land between two numbers, use the bigger one: a helmet's dial can take up slack, it cannot create room.
65 cm is 25.6 inches. American size charts are usually written in inches, European ones in centimetres, and both describe the same measurement.