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Women's Sierra

If serious protection at a great value isn’t reason enough, this feature-rich design also includes the HairPort SX dial fit system for a simple, more secure setup for women. The Sierra comes in graphics and colors to match our women’s bikes and apparel.

If serious protection at a great value isn’t reason enough, this feature-rich design also includes the HairPort SX dial fit system for a simple, more secure setup for women. The Sierra comes in graphics and colors to match our women’s bikes and apparel.

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The Sierra offers serious protection at a tremendous value. Its feature-rich design maximizes comfort and protection, while the HairPort SX dial fit system provides a simple, more secure setup for women.
  • One-size system based on women’s head sizing, designed for easy and accurate fit.
  • Ponytail-ready HairPort SX fit system with micro-adjustable dial for an easy, accurate fit.
  • 4th Dimension Cooling System optimizes ventilation.
  • In-molded shell improves strength and reduces weight.
  • Tri-Fix web splitter for improved comfort and ease of strap adjustments.
  • Reflective webbing and decals for increased visibility in low-light conditions.
  • Patented clip-on visor included.
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Please contact your Specialized retailer to confirm availability.

Helmet Size Chart

Model
Fit Size
Hat Size
Inch
Metric
Airnet
Small
6-3/8 -
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Align
One Size
6 3/4-
7 3/4
21 1/4"-
24 1/2"
54-
62cm
Ambush / Ambush Comp
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 3/4-
7 1/4
21 1/4"-
23"
54-
58cm
Large
7 1/8-
7 5/8
22 1/2"-
24"
57-
61cm
X-Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Aspire
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Centro
One Size
6 3/4-
7 3/4
21 1/4"-
24 1/2"
54-
62cm
Chamonix
One Size
6 3/4-
7 3/4
21 1/4"-
24 1/2"
54-
62cm
Covert
Small
6 1/2-
7
20 1/2"-
22"
52-
56cm
Medium
7-
7 1/2
22"-
23 1/2"
56-
60cm
Large
7 1/2-
7 7/8
23 1/2"-
24 3/4"
60-
63cm
Covert Kids
X-Small
6-
6 5/8
18 1/2"-
20 3/4"
47-
53cm
Small
6 1/2-
7
20 1/2"-
22"
52-
56cm
Medium
7-
7 1/2
22"-
23 1/2"
56-
60cm
Dissident / Dissident Comp
Small
6 3/4-
6 7/8
21 1/4"-
21 3/4"
54-
55cm
Medium
7-
7 1/8
22"-
22 1/2"
56-
57cm
Large
7 1/4-
7 3/8
22 5/8"-
23"
58-
59cm
X-Large
7 1/2-
7 3/4
23 1/2"-
24 1/4"
60-
62cm
Duet
One Size
6 1/4-
7 1/4
19 3/4"-
23"
50-
58cm
Echelon
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Evade / Evade Tri
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Flash
One Size
6 1/4-
7 1/4
19 3/4"-
23"
50-
58cm
Flash
One Size
7-
8
22"-
25 1/4"
56-
64cm
Mio
One Size
< 6-
6 3/8
18"-
20"
46-
51cm
Prevail
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
Propero 3
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm
S-Works TT
X-Small/Small
6 3/8-
7 1/8
20"-
22 1/2"
51-
57cm
Medium/Large
6 3/4-
7 1/2
21 1/4"-
23 1/2"
54-
60cm
Sierra
One Size
6 1/4-
7 1/4
19 3/4"-
23"
50-
58cm
Shuffle Child
One Size
6 1/4-
6 7/8
19 3/4"-
21 3/4"
50-
55cm
Shuffle Youth
One Size
6 1/2-
7 1/8
20 1/2"-
22 1/2"
52-
57cm
Small Fry Child
One Size
< 6-
6 7/8
18 1/2"-
21 3/4"
47-
55cm
Small Fry Toddler
One Size
< 6-
6 1/2
17 1/2"-
20 1/2"
44-
52cm
Tactic
Small
6 3/8-
7
20"-
22"
51-
56cm
Medium
6 7/8-
7 3/8
21 3/4"-
23 1/4"
55-
59cm
Large
7 3/8-
7 7/8
23 1/4"-
24 3/4"
59-
63cm