Troy Lee Designs Size Guide
Troy Lee Designs is a premium action sports apparel brand specialising in protective gear, jerseys, and outerwear for cycling, motorsports, and BMX. The brand is renowned for its technical fit, durability, and attention to detail. Troy Lee Designs products tend to run true to size, with fits tailored to each specific discipline. Whether you're shopping for a helmet, race jersey, or protective trousers, accurate measurements are essential to ensure comfort and proper protection.
How to Measure
- Head circumference: Wrap a soft fabric tape measure around the widest part of your head, holding it just above your eyebrows and ears. Keep the tape snug but not tight. This measurement is critical for helmet sizing.
- Chest: Measure around the widest part of your chest, generally at or just above the nipple line. Keep the tape parallel to the ground and relaxed (not pulled tight).
- Waist: Measure just above your navel without pinching or compressing the tape. This is typically where trousers sit.
- Sleeve/arm length: Measure from the centre back of your neck down to your wrist with your arm slightly bent, or from the shoulder joint to the wrist. Different styles may have specific measurement points — check the individual product chart.
- Inseam (inside leg): Measure from the top of the inside leg to below the ankle. It's helpful to wear the shoes you'll typically ride in.
- Thigh circumference: Measure around the widest part of the thigh, approximately 1 inch down from the crotch seam.
- Hip: Measure around the widest part of your bottom and hips.
Tip: Have someone else help you with measurements for accuracy. Take measurements while wearing minimal clothing and avoid pulling the tape too tight.
Size Charts
Helmets — A1/A2 Series (Unisex)
| Size | Head Circumference (cm) | Head Circumference (inches) | Hat Size |
|---|---|---|---|
| YXS | 48–49 | 19–19⅜ | 6–6⅛ |
| XS | 50–51 | 19¾–20⅛ | 6¼–6⅜ |
| S | 52–53 | 20½–20⅞ | 6½–6⅝ |
| M/L | 54–57 | 21¼–22⅜ | 6¾–7⅛ |
| XL/XXL | 60–62 | 23⅝–24⅜ | 7⅜–7¾ |
Bike Jerseys — Men's Long Sleeve
| Size | Center Front (inches) | Center Back (inches) | Chest (inches) | Waist (inches) | Sleeve Length (inches) | Sleeve Opening (inches) |
|---|---|---|---|---|---|---|
| SM | 27.5–27.75 | 30–30.5 | 19.25–20 | 19–19.75 | 27.25–33.5 | 3.75–5.25 |
| MD | 28.25 | 30.75–31 | 20.75–21.5 | 20.5–21.25 | 28.25–34.5 | 4–5.5 |
| LG | 29–29.75 | 31.5 | 22.25–23 | 22–22.75 | 29.25–35.5 | 4.25–5.75 |
| XL | 29.75 | 32–32.25 | 24–24.5 | 24–24.25 | 30.25–36.5 | 4.5–6 |
| XXL | 30.5 | 32.25 | 25.5–26.5 | 25.5–26.25 | 31.25–37.5 | 4.75–6.25 |
Bike Jerseys — Women's Long Sleeve
| Size | Center Front (inches) | Center Back (inches) | Chest (inches) | Waist (inches) | Sleeve Length (inches) | Sleeve Opening (inches) |
|---|---|---|---|---|---|---|
| XS | 23.25 | 26.5 | 15.75 | 14.75 | 24–24.75 | 3.25 |
| SM | 24.5 | 27.25 | 17.25 | 16.25 | 24.75 | 3.5 |
| MD | 25 | 28 | 18.75 | 17.75 | 25 | 3.75 |
| LG | 25.75 | 28.75 | 20.25 | 19.25 | 25.75 | 4 |
| XL | 26.25 | 29.25 | 21.75 | 20.75 | 26.5 | 4.25 |
Bike Trousers — Unisex
| US Size | Waist (cm) | Waist (inches) | Hip – 4" up (inches) | Thigh – 1" down (inches) | Leg Opening (inches) | Inseam (inches) |
|---|---|---|---|---|---|---|
| 28 | 71 | 14.75 | 19 | 12.75 | 5.5 | 31.5 |
| 30 | 76 | 15.75 | 20 | 13.25 | 5.75 | 32.5 |
| 32 | 81 | 16.75 | 21 | 13.75 | 6 | 32.5 |
| 34 | 86 | 17.75 | 22 | 14.25 | 6.25 | 32.5 |
| 36 | 91 | 18.75 | 23 | 14.75 | 6.5 | 33.5 |
| 38 | 97 | 19.75 | 24 | 15.25 | 6.75 | 33.5 |
| 40 | 102 | 20.75 | 25 | 15.75 | 7 | 33.5 |
Bike Shorts — Ace Series (Unisex)
| US Size | Waist Range (cm) | Waist Range (inches) | Inseam (inches) |
|---|---|---|---|
| 28 | 68.5–73.7 | 27–29 | 34.3 |
| 30 | 73.7–78.7 | 29–31 | 34.3 |
| 32 | 78.7–83.8 | 31–33 | 34.3 |
| 34 | 83.8–88.9 | 33–35 | 34.3 |
| 36 | 88.9–94 | 35–37 | 34.3 |
| 38 | 94–99.1 | 37–39 | 34.3 |
Bike Shorts — Sprint Series (Unisex)
| US Size | Waist Range (cm) | Waist Range (inches) | Inseam (inches) |
|---|---|---|---|
| 26 | 63.5–68.6 | 25–27 | 35.6 |
| 28 | 68.6–73.7 | 27–29 | 35.6 |
| 30 | 73.7–78.7 | 29–31 | 35.6 |
| 32 | 78.7–83.8 | 31–33 | 35.6 |
| 34 | 83.8–88.9 | 33–35 | 35.6 |
| 36 | 88.9–94 | 35–37 | 35.6 |
| 38 | 94–99.1 | 37–39 | 35.6 |
Product-Specific Guidance
Helmets
Troy Lee Designs helmets are engineered for safety and comfort in action sports disciplines including BMX, mountain biking, and motorsports. Head circumference is the primary measurement. Measure around the thickest part of your head just above the eyebrows and ears. The A1/A2 helmet line spans from youth sizes (YXS, 48 cm) through adult XXL (62 cm). A snug but not tight fit is essential — the helmet should not move when you shake your head, and you should feel even pressure all around.
Jerseys
Troy Lee Designs jerseys feature a tailored, athletic fit designed for on-bike comfort and mobility. Long-sleeve jerseys (Ruckus, Sprint, Skyline, Flowline, and Lilium styles) vary slightly in cut and sleeve length. Measure your chest 1 inch below the armhole and your sleeve length from the centre back of the neck. Women's jerseys are cut narrower through the waist and shoulder than men's styles. Many riders prefer a snug fit for better aerodynamics and to reduce baggage on the jersey pockets.
Trousers & Shorts
Bike trousers are designed for protection and range of motion. Measure your waist just above the navel, your inseam from the top of the inside leg to below the ankle, and thigh circumference 1 inch down from the crotch. Troy Lee Designs trousers come in US sizing (28–40). Shorts (Ace and Sprint series) have fixed inseam lengths and offer a comfort range at the waist to accommodate a protective pad or undergarment. If you fall between sizes, the brand recommends choosing the larger size for comfort.
Sizing Tips
- Troy Lee Designs products run true to size in most lines. However, different styles (e.g., Super Retro versus Sprint outerwear, or Lilium versus standard women's jerseys) may have subtle fit variations — always check the specific product chart.
- Helmets are your most critical fit: a proper helmet should feel snug across the forehead and temples with even pressure. Avoid gaps that could allow the helmet to shift during impact.
- For jerseys, a slightly fitted cut is intentional in Troy Lee Designs — it reduces fabric flap and improves aerodynamics. If you prefer a looser fit for casual wear, consider sizing up.
- When ordering trousers, measure your inseam carefully. Troy Lee Designs offers limited length variation, so precision is important. Wear the shoes and protective gear you'll ride in when measuring.
- Shorts come with fixed inseams (e.g., 34.3 inches for Ace, 35.6 inches for Sprint) and waist ranges. These are designed to fit over a base layer or padded brief — do not size down expecting to wear them without protection.
- If your measurements fall between two sizes, especially for helmets or trousers, go up one size. Troy Lee Designs prioritises safety and comfort, and a slightly larger fit is preferable to one that is too snug.
- Check the individual product page for material care and fit notes, as some fabrics (mesh, technical fabrics) may have slightly different stretch characteristics.