Sena Bike Helmet Size Chart
1. Achieve the perfect fit by measuring your head circumference correctly.
2. Watch the video below to see how to measure your head correctly.
3. VIDEO: How To Measure For A Bike Helmet
4. On the chart below, find the helmet model that you are interested in, then find your head measurement to see which size you need.
Sena Bike Helmet Size Charts
Sena Smart Road Cycling Helmets
Model | S | M | L |
---|---|---|---|
R1 Smart Cycling Helmet | 50 β 55cm | 55 β 58cm | 58 β 62cm |
19β β β 21ΒΎβ | 21ΒΎβ β 22β β | 22β β β 24Β½β | |
R1 Evo Smart Cycling Helmet | 50 β 55cm | 55 β 58cm | 58 β 62cm |
19β β β 21ΒΎβ | 21ΒΎβ β 22β β | 22β β β 24Β½β | |
R2 Smart Cycling Helmet | 50 β 55cm | 55 β 58cm | 58 β 62cm |
19β β β 21ΒΎβ | 21ΒΎβ β 22β β | 22β β β 24Β½β | |
R2 Evo Smart Cycling Helmet | 50 β 55cm | 55 β 58cm | 58 β 62cm |
19β β β 21ΒΎβ | 21ΒΎβ β 22β β | 22β β β 24Β½β | |
RX2 Smart Cycling Helmet | 50 β 55cm | 55 β 58cm | 58 β 62cm |
19β β β 21ΒΎβ | 21ΒΎβ β 22β β | 22β β β 24Β½β | |
C1 Smart Cycling Helmet | 54 β 58cm | 58 β 61cm | |
21ΒΌβ β 22β β | 22β β β 23ΒΎβ |
Sena Smart Hybrid Cycling Helmets
Model | M | L |
---|---|---|
Rumba Multi-Sport Helmet | 54 β 58cm | 58 β 62cm |
21ΒΌβ β 22β β | 22β β β 24Β½β | |
X1S Smart Cycling Helmet | 55 β 59cm | 59 β 63cm |
21ΒΎβ β 23β β | 23β β β 24ΒΎβ |
Sena Smart Trail Helmets
Model | M | L |
---|---|---|
M1 Mountain Bike Helmet | 55 β 59cm | 59 β 63cm |
21ΒΎβ β 23β β | 23β β β 24ΒΎβ | |
M1 Evo Mountain Bike Helmet | 55 β 59cm | 59 β 63cm |
21ΒΎβ β 23β β | 23β β β 24ΒΎβ |