Get free shipping, on most items, with your $50 purchase today! Same day shipping on most orders if placed by 3pm PST.
This offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and some exclusions apply.
Some large and/or heavy items are subject to additional oversize charges that are separate from standard shipping costs.
Bike Build Process
All bikes are built, tested, tuned, and ready to ride upon shipment. The bike build process typically takes 2-3 days to complete depending on the bike model and the complexity of the build.
Orders for in-stock items placed by 3PM PST usually ship on the same day. Orders that include special-order or backordered items may be subject to shipping delays depending on product availability. Refer to estimated delivery times in cart when selecting shipping options.
We strive to get you the gear you want at a competitive price. If you find an item we offer from a competitor at a lower price, let us know. We will do our best to instantly match their price. To qualify for the Price Match, your purchase must meet the following conditions:
Price Matches may only be honored on identical items. The product must be the same make and model (i.e., the same size, color, year, etc.).
The identical items must be in stock and ready for immediate delivery at the competing dealer.
Price Matching voids any currently advertised Jenson USA promotions or special offers (i.e. free shipping, free headset...). If the competitor offers free shipping on the specific item, Jenson USA will still match the price and free shipping offer.
The product must be brand new. We do not Price Match refurbished or used items.
Our Price Match Policy is valid only for qualified Internet retailers.
The competing dealer must be an authorized US retailer for the brand. This means that the manufacturer lists this dealer as an authorized and official retail web site.
The competing online retailer's principle business must be located within the United States.
Our Price Match Policy does not combine with any competitor’s coupons, rebates, promotional offers, or product-combo deals on your order.
Some items may not be eligible for price match due to manufacturer pricing requirements.
The Price Match Policy is subject to change at any time.
If you have any questions regarding a Price Match, one of our Gear Advisors will be happy to lend you expert guidance via phone, email, or chat.
Price Matches made post-purchase will be refunded via gift card
The Protone is a an intersection of an aerodynamic design and a traditional road helmet. Kask put their best technologies into the Protone for an unparalleled aerodynamic helmet that suits for your need for speed. Looks and function aside, at its' core the Protone features an inner frame that is designed to break apart upon impact. This absorbs and defrays shock. Kask uses their Octo Fit rubber micro dial adjuster to distribute 180-degrees of equal tension. The floating cradle contact points work well with the internal gel pads to sit comfortably on any head shape. Coolmax inner padding and an eco-leather chin strap keep the Protone sitting comfortably on your head.
innovative inner strengthening frame offers a greater mechanical strength and a better compactness.
Incredibly aerodynamic and top performing shell tested in the wind-tunnel and able to provide a really impressive CX rate.
Faux-Leather Chinstrap made from faux leather
3D dry padding utilizes a multi-layer open cell construction process for the best comfort and performance
Colmax Fiber removable and wshable inner padding in Coolmax material
Inner frame offers greater mechanical strength and better compactness
In-molding joins the inner polystyrine cap to the outer plycarbin one ensuring better shock absorption
MIT guarantees greater safety and complete protection
Octo fit offers an improved fit
Sanitized treated fabric inner fabric treated with antimicrobial and antibacterial sanitized process
Aero-control wind tunnel tested and able to provide a really impressive CX rate
High-Visibility for maximum safety
EN 1078, CPSC 1203, AS/NZS 2063
235g (Size medium)
Head Circumference (in)
19-11/16" - 22-3/64"
20-15/32" - 22-53/64"
23-15/64" - 24-13/32"
Head Circumference (cm)
50cm - 56cm
52cm - 58cm
59cm - 62cm
Love this Product?
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Q & A
Most items SHIP SAME DAY if ordered by 3pm PST and FREE SHIPPING on orders over $50. Please note that oversize charges may still apply on some heavy or large items and free shipping does not apply to PO Boxes.
1-day free standard Shipping on most orders to California, 2-day free standard Shipping on most orders to Nevada, Arizona, & Utah. Other states can expect delivery within 3 to 5 days.
Jenson USA ships worldwide, including APO/FPO addresses. For a more specific shipping quote and transit time estimate, simply add the items you are interested into your shopping cart and look for the "Shipping Options" box at the top of the cart page. You don't have to login or create an account to see shipping charges and time in transit estimates.
Some manufacturers restrict where we can ship their products. If this item has shipping restrictions, they are listed below. If you'd like to buy an item that we cannot ship to your address, we can accept your foreign credit card and ship it to a US address for you.