Alpinestars Bionic SX Knee Protector provides impact and motion injury to the knee and surrounding tissue. With coverage for the knee, shin and thigh, the Alpinestars Bionic SX Knee Protector is slim fitting and simple to adjust. Breathable and comfortable, the Alpinestars Bionic SX Knee Protector is a knee brace you can wear for every activity.
Super lightweight knee guard that provides exceptional impact protection
Extensive protection zones fulfills CE standard EN 1621-1 (KL Type B)
Constructed with highly breathable materials in an efficient ventilation configuration for superior airflow
Complete TPU protector coverage over the knee, shin and lower thigh
Inner medial kneecup features a sleek design for reduced material thickness between the knee and bike for greater control while riding
Guard is backed with highly perforated, PU memory foam to keep you cool and comfortable. Slim, easy to adjust straps ensure a precise fit
ALPINESTARS
| Alpinestars Boots |
|---|
| US Size | Euro Size |
| 3 | 35 |
| 3.5 | 36 |
| 4 | 37 |
| 5 | 38 |
| 6 | 39 |
| 6.5 | 40 |
| 7.5 | 41 |
| 8 | 42 |
| 9 | 43 |
| 9.5 | 44 |
| 10.5 | 45 |
| 11.5 | 46 |
| 12 | 47 |
| 12.5 | 48 |
| 13 | 49 |
| 13.5 | 50 |
| Alpinestars Womens Boots |
|---|
| US Size | Euro Size |
| 5.5 | 36 |
| 6 | 37 |
| 7 | 38 |
| 8 | 39 |
| 8.5 | 40 |
| 9.5 | 41 |
| 10 | 42 |
| 11 | 43 |
PANTS AND JACKETS
Bust or Chest: measured around the fullest part of the chest
Waist: measured at the natural waist
Hip: measured at the widest part of the hips
Inseam: measured from the crotch to the floor
Height: natural height without shoes
WOMENS
| Alpinestars Womens Pants Sizes |
|---|
| Size | Waist | Hip | Inseam | Height |
| XS | 23.5" - 26.7" | 34.2" - 35.8" | 30" | 63" |
| SM | 26.7" - 28.7" | 36.6" - 38.2" | 31" | 64" |
| MD | 28.7" - 31.1" | 39" - 40.5" | 31" | 65" |
| LG | 31.1" - 33.5" | 41.2" - 43" | 32" | 66" |
| XL | 33.5" - 35.8" | 43.7" - 45.2" | 33" | 67" |
| 2X | 35.8" - 38.2" | 46" - 47.7" | 33" | 68" |
| Alpinestars Womens Textile Jacket Sizes |
|---|
| Size | Bust | Waist | Hip | Height |
| XS | 32.6" - 34.2" | 24.8" - 26.3" | 34.2" - 35.8" | 64 - 65" |
| SM | 35" - 36.6" | 27.1" - 28.7" | 36.6" - 38.2" | 65 - 67" |
| MD | 37.4" - 38.9" | 29.5" - 31.1" | 38.9" - 40.5" | 67 - 68" |
| LG | 39.7" - 41.3" | 31.9" - 33.4" | 41.3" - 42.9" | 68 - 69" |
| XL | 42" - 43.7" | 34.2" - 35.8" | 43.7" - 45.2" | 69 - 70" |
| 2X | 44.5" - 46" | 36.6" - 38.2" | 46" - 47.7" | 70 - 71" |
| Alpinestars Womens Leather Jacket Sizes |
|---|
| Euro Size | Bust | Waist | Hip | Height |
| 34 | 32.6" - 34.2" | 24.8" - 26.3" | 34.2" - 35.8" | 63" |
| 36 | 35" - 36.6" | 27.1" - 28.7" | 36.6" - 38.2" | 64" |
| 38 | 37.4" - 38.9" | 29.5" - 31.1" | 38.9" - 40.5" | 65" |
| 40 | 39.7" - 41.3" | 31.9" - 33.4" | 41.3" - 42.9" | 67" |
| 42 | 42" - 43.7" | 34.2" - 35.8" | 43.7" - 45.2" | 68" |
| 44 | 44.5" - 46" | 36.6" - 38.2" | 46" - 47.7" | 69" |
| 46 | 44.5" - 46" | 36.6" - 38.2" | 46" - 47.7" | 70" |
MENS
| Alpinestars Mens Pants Sizes |
|---|
| Size | US Size | Euro Size | Waist | Hip | Inseam | Height |
| XS | 28 | 44 | 29.8" | 36.2" | 30" | 69" |
| SM | 30 | 46 | 31.5" | 37.7" | 32" | 70" |
| MD | 32 | 48 | 33.1" | 39.8" | 34" | 71" |
| LG | 34 | 50 | 34.6" | 41" | 34" | 72" |
| XL | 36 | 52 | 36.2" | 42.5" | 36" | 73" |
| 2X | 38 | 54 | 37.7" | 44.1" | 36" | 75" |
| 3X | 40 | 56 | 39.4" | 45.6" | 38" | 76" |
| 4X | 42 | 58 | 41" | 47.2" | 38" | 77" |
| Alpinestars Mens Textile Jacket Sizes |
|---|
| Size | Chest | Waist | Hip | Height |
| XS | 35" - 36.6" | 28.7" - 30.2" | 35" - 36.6" | 67 - 69" |
| SM | 37.4" - 38.9" | 31.1" - 32.6" | 37.4" - 38.9" | 69 - 70" |
| MD | 39.7" - 41.3" | 33.4" - 35" | 39.7" - 41.3" | 70 - 71" |
| LG | 42.1" - 43.7" | 35.8" - 37.4" | 42.1" - 43.7" | 71 - 72" |
| XL | 44.5" - 46" | 38.1" - 39.7" | 44.5" - 46" | 72 - 73" |
| 2X | 46.8" - 48.7" | 40.5" - 42.1" | 46.8" - 48.4" | 73 - 75" |
| 3X | 49.2" - 50.7" | 42.8" - 44.5" | 49.2" - 50.7" | 75 - 76" |
| 4X | 51.6" - 53.1" | 45.2" - 46.8" | 51.8" - 53.1" | 76 - 77" |
| Alpinestars Mens Leather Jacket Sizes |
|---|
| Euro Size | Chest | Waist | Hip | Height |
| 46 | 36.6" | 29.8" | 36.6" | 69" |
| 48 | 37.4" | 31.5" | 37.4" | 70" |
| 50 | 39.3" | 33.1" | 39.8" | 71" |
| 52 | 41" | 34.6" | 41" | 72" |
| 54 | 42.5" | 36.2" | 42.5" | 73" |
| 56 | 44.1" | 37.7" | 44.1" | 75" |
| 58 | 45.6" | 39.4" | 45.6" | 76" |
| 60 | 47.2" | 41" | 47.2" | 77" |
RACING SUITS
| Alpinestars Mens Suits Sizes |
|---|
| Size | Waist | Hip | Inseam | Height |
| 36 | 29.8" | 36.2" | 30" | 69" |
| 38 | 31.5" | 37.7" | 32" | 70" |
| 40 | 33.1" | 39.8" | 34" | 71" |
| 42 | 34.6" | 41" | 34" | 72" |
| 44 | 36.2" | 42.5" | 36" | 73" |
| 46 | 37.7" | 44.1" | 36" | 75" |
| 48 | 39.4" | 45.6" | 38" | 76" |
| 50 | 41" | 47.2" | 38" | 77" |
|
| Alpinestars Womens Suits Sizes |
|---|
| Size | Bust | Waist | Hip | Inseam | Height |
| 34 | 31.5" | 23.5" | 33" | 30.2" | 63" |
| 36 | 33" | 25.2" | 34.7" | 31" | 64" |
| 38 | 34.7" | 26.7" | 36.2" | 31" | 65" |
| 40 | 36.2" | 28.2" | 37.7" | 32" | 67" |
| 42 | 37.7" | 30" | 39.2" | 32" | 68" |
| 44 | 39.2" | 31.5" | 41" | 32.7" | 69" |
| 46 | 41" | 33.2" | 42.5" | 33.5" | 70" |
GLOVES
To measure for Gloves: place a tape measure under your palm and measure from the knuckle of your forefinger to the knuckle of your pinkie finger. Note the measurement and compare it to the chart below.
| Alpinestars Glove Sizes |
|---|
| Measurement | Glove Size | Numeric Size |
| 2 1/8" - 2 5/8" | XS | 7 |
| 2 5/8" - 3 1/8" | SM | 8 |
| 3 1/8" - 3 5/8" | MD | 9 |
| 3 5/8" - 4 1/8" | LG | 10 |
| 4 1/8" - 4 5/8" | XL | 11 |
| 4 5/8" - 5 1/8" | 2X | 12 |
We do not guarantee fit. This sizing chart is a suggested guideline only.
