Bike helmets for a 55 cm head
A 55 cm head is 21.7 inches. Of the 53 helmets we track, 52 fit you — and here is the exact size to order in each brand.
52 helmets that fit a 55 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 55 cm.
| Brand | Model | Your size | That size covers | Riding | Safety (VT) | Price | |
|---|---|---|---|---|---|---|---|
| Bell | Nomad 2 MIPS | Universal S/M | 52-57 cm (20.5-22.4 in) | MTB | Not rated | ~€45 | View |
| Bell | Avenue MIPS | Universal S/M | 50-57 cm (19.7-22.4 in) | Road | Not rated | ~€47 | View |
| Giro | Agilis MIPS | S snug | 51-55 cm (20.1-21.6 in) | Road | Not rated | ~€60 | View |
| SCOTT | Supra | One size | 54-61 cm (21.3-24.0 in) | Road, Gravel, MTB | Not rated | ~€60 | View |
| Lazer | CityZen KinetiCore | S | 52-56 cm (20.5-22.0 in) | Urban | ★★★☆☆ 3/5 | ~€65 | View |
| ABUS | Hyban 2.0 | M | 52-58 cm (20.5-22.8 in) | Urban | Not rated | ~€65 | View |
| Smith | Signal MIPS | S snug | 51-55 cm (20.1-21.6 in) | Road | ★★★☆☆ 3/5 | ~€68 | View |
| Smith | Convoy MIPS | S snug | 51-55 cm (20.1-21.6 in) | MTB | Not rated | ~€68 | View |
| MET | Terranova MIPS | S | 52-56 cm (20.5-22.0 in) | MTB | ★★★★☆ 4/5 | ~€70 | View |
| Lazer | Tonic KinetiCore | S | 52-56 cm (20.5-22.0 in) | Road, Urban | ★★★☆☆ 3/5 | ~€70 | View |
| Endura | Hummvee Plus MIPS | S-M | 51-56 cm (20.1-22.0 in) | MTB, Urban | ★★☆☆☆ 2/5 | ~€75 | View |
| Bern | Macon 2.0 MIPS | S snug | 52-55.5 cm (20.5-21.8 in) | Urban | ★★★★☆ 4/5 | ~€77 | View |
| Bell | Daily LED MIPS | Universal Adult | 53-60 cm (20.9-23.6 in) | Urban | Not rated | ~€77 | View |
| SCOTT | Argo Plus | S/M | 54-58 cm (21.3-22.8 in) | MTB | ★★★★☆ 4/5 | ~€80 | View |
| Fox | Mainframe MIPS | S snug | 51-55 cm (20.1-21.6 in) | MTB | ★★★☆☆ 3/5 | ~€83 | View |
| Bell | 4Forty MIPS | S | 52-56 cm (20.5-22.0 in) | MTB | Not rated | ~€87 | View |
| Giro | Radix MIPS | S snug | 51-55 cm (20.1-21.6 in) | MTB | Not rated | ~€87 | View |
| POC | Axion Race MIPS | M | 55-58 cm (21.7-22.8 in) | MTB | Not rated | ~€90 | View |
| Kask | Sintesi | M | 52-58 cm (20.5-22.8 in) | Road, Gravel, MTB, Urban | Not rated | ~€100 | View |
| MET | Idolo MIPS | UN | 52-59 cm (20.5-23.2 in) | Road | Not rated | ~€100 | View |
| SCOTT | Arx Plus | S snug | 51-55 cm (20.1-21.6 in) | Road, Gravel, MTB | ★★★★☆ 4/5 | ~€100 | View |
| Bern | Hendrix MIPS | S snug | 52-55.5 cm (20.5-21.8 in) | Urban | Not rated | ~€104 | View |
| Smith | Persist MIPS | S snug | 51-55 cm (20.1-21.6 in) | Road | Not rated | ~€109 | View |
| Fox | Speedframe | S snug | 51-55 cm (20.1-21.6 in) | MTB | ★★★☆☆ 3/5 | ~€110 | View |
| Bern | Watts 2.0 MIPS | S snug | 52-55.5 cm (20.5-21.8 in) | Urban | Not rated | ~€112 | View |
| Lazer | Strada KinetiCore | S | 52-56 cm (20.5-22.0 in) | Road, Gravel, Urban | ★★★☆☆ 3/5 | ~€120 | View |
| Uvex | Quatro | 52-57 cm | 52-57 cm (20.5-22.4 in) | MTB | Not rated | ~€120 | View |
| Uvex | Rise | 52-56 cm | 52-56 cm (20.5-22.0 in) | Road | Not rated | ~€120 | View |
| Giro | Manifest Spherical | S snug | 51-55 cm (20.1-21.6 in) | MTB | ★★★★☆ 4/5 | ~€127 | View |
| Bell | Falcon XR MIPS | S | 52-56 cm (20.5-22.0 in) | Road, Gravel | Not rated | ~€130 | View |
| Smith | Session MIPS | S snug | 51-55 cm (20.1-21.6 in) | MTB | Not rated | ~€135 | View |
| MET | Estro MIPS | S | 52-56 cm (20.5-22.0 in) | Road, Gravel | Not rated | ~€140 | View |
| Fox | Crossframe Pro | S snug | 51-55 cm (20.1-21.6 in) | MTB, Gravel | ★★★★★ 5/5 | ~€147 | View |
| Kask | Mojito³ | M | 52-58 cm (20.5-22.8 in) | Road | Not rated | ~€149 | View |
| Giro | Syntax MIPS | S snug | 51-55 cm (20.1-21.6 in) | Road, Gravel | ★★★☆☆ 3/5 | ~€150 | View |
| Thousand | Chapter MIPS | S | 54-57 cm (21.3-22.4 in) | Urban | ★★★★☆ 4/5 | ~€156 | View |
| Trek | Circuit WaveCel | S | 51-57 cm (20.1-22.4 in) | Road | ★★★★☆ 4/5 | ~€157 | View |
| Giro | Eclipse Spherical | S snug | 51-55 cm (20.1-21.6 in) | Road | ★★★★☆ 4/5 | ~€179 | View |
| POC | Omne Air MIPS | M | 54-59 cm (21.3-23.2 in) | Road, Urban | Not rated | ~€180 | View |
| Giro | Aether Spherical | S snug | 51-55 cm (20.1-21.6 in) | Road | ★★★★☆ 4/5 | ~€181 | View |
| Lazer | Jackal KinetiCore | S | 52-56 cm (20.5-22.0 in) | MTB | ★★★☆☆ 3/5 | ~€190 | View |
| MET | Revo | S | 52-56 cm (20.5-22.0 in) | MTB | ★★★★☆ 4/5 | ~€200 | View |
| Kask | Urban R | S/M | 51-57 cm (20.1-22.4 in) | Urban | Not rated | ~€210 | View |
| Kask | Protone Icon | M | 52-58 cm (20.5-22.8 in) | Road, Gravel, MTB | Not rated | ~€219 | View |
| POC | Ventral Air MIPS | M | 54-59 cm (21.3-23.2 in) | Road, Gravel | Not rated | ~€260 | View |
| POC | Kortal Race MIPS | M-L | 55-58 cm (21.7-22.8 in) | MTB | Not rated | ~€270 | View |
| MET | Trenta 3K Carbon MIPS | S | 52-56 cm (20.5-22.0 in) | Road, Gravel | ★★★★★ 5/5 | ~€400 | View |
| ABUS | MoDrop MIPS | M | 52-58 cm (20.5-22.8 in) | MTB | ★★★★☆ 4/5 | Check price | View |
| Trek | Rally WaveCel | S | 51-57 cm (20.1-22.4 in) | MTB | ★★★★☆ 4/5 | Check price | View |
| Trek | Solstice Mips | S/M | 51-58 cm (20.1-22.8 in) | Urban, Road | ★★★★☆ 4/5 | Check price | View |
| ABUS | Pedelec 2.0 | M | 52-57 cm (20.5-22.4 in) | Urban | Not rated | Check price | View |
| Giro | Fixture II MIPS | Universal Adult | 54-61 cm (21.3-24.0 in) | MTB, Urban | Not rated | Check price | View |
17 models are marked “snug”: 55 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 55 cm.
Open the finder at 55 cmIs 55 cm a big head?
55 cm (21.7 in) sits in the middle of the adult range, which is good news: 98% of the models we track have a size for you, so you can choose on safety, weight and price instead of settling for whatever fits.
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.
55 cm is 21.7 inches. American size charts are usually written in inches, European ones in centimetres, and both describe the same measurement.