Alpinestars SMX-S Boots - Black/White
US 4 / EU 37
$299.95
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- Durable, high-tech micro-fiber upper construction offering a high level of flexibility
- Interchangeable bi-injected PU toe slider with snap-in assembly
- Large ‘throat’ profile instep and Achilles flex bellows for superior flex and comfort
- MTP mesh liner and anatomical, removable, PU Foam foot bed keeps the foot cool and comfortable
Color: Black/White
In stock — dispatched in 1–2 business days
Estimated delivery
Ways to pay
- Shop Pay Installments — 4 interest-free payments on orders $50–$999.99, or pay monthly.
- Afterpay — 4 interest-free payments, generally over six weeks.
Also credit and debit cards, PayPal, Cash App Pay, Apple Pay and Google Pay. Choose how to pay at checkout.
Installments are subject to approval.
- FreeUS shipping on this item
- 90-dayreturns, no restocking fee
- GenuineAlpinestars, authorized dealer
Not sure about your size?
Check the size guide below, or send us the size you usually wear and a specialist at the dealership helps you pick the right one. No charge, no obligation.
See the size guide ↓
Ask a specialist →
Need help?
Not sure which size to order? Call the parts counter at Riders Miami Motorsports and we help you pick.
Tap to call · +1 645-239-3174Product details
- Durable microfiber upper for comfort and fit and incorporating a host of advanced protective features, inside and out, the SMX-S Boot features an ergonomic forefoot shaping, a breathable lining and Alpinestars’ exclusive rubber compound sole for optimized levels of support and performance
- Durable, high-tech micro-fiber upper construction offering a high level of flexibility
- Double injected Polyurethane (PU) shields the shin, ankle, calf, toe and heel from impact while minimizing abrasion
- Inner protection is given by a double injected panel connected to the heel counter, hidden beneath the outer shell and running up the outer ankle
- Quick drying polyamide lining is laminated with open cell foam and high density contoured padding to absorb shocks to the foot area
- Exclusive compound rubber sole features structured shank reinforcement for added support to the arch area
- Interchangeable bi-injected PU toe slider with snap-in assembly
- Innovative air vents at the ankle, heel and forefoot are covered with a specially designed mesh to provide unmatched levels of rider comfort
- Large ‘throat’ profile instep and Achilles flex bellows for superior flex and comfort
- MTP mesh liner and anatomical, removable, PU Foam foot bed keeps the foot cool and comfortable
- Innovative inner (medial) side entry opening/closure system that features an elastic mounted zipper with an extra wide Velcro® flap, to give a precise, comfortable fit and wide opening aperture for ease of access
- Highly ergonomic last for ultra precise fit
| Brand | ALPINESTARS |
|---|---|
| Category | Footwear |
| Size | US 4 / EU 37, US 3.5 / EU 36, US 5 / EU 38, US 6 / EU 39, US 6.5 / EU 40, US 8 / EU 42, US 11.5 / EU 46, US 12 / EU 47, US 12.5 / EU 48, US 13.5 / EU 49, US 14 / EU 50, US 7.5 / EU 41, US 9 / EU 43, US 9.5 / EU 44, US 10.5 / EU 45 |
Part numbers by option
Each size is a separate manufacturer part. Pick your size above and we ship that exact part number.
| Size | Part number | UPC | Shipping weight |
|---|---|---|---|
| US 4 / EU 37 | 3404-1329 | 8021506618713 | 4.0 lb |
| US 3.5 / EU 36 | 3404-1328 | 8021506618706 | 4.0 lb |
| US 5 / EU 38 | 3404-1330 | 8021506618720 | 4.0 lb |
| US 6 / EU 39 | 3404-1331 | 8021506618737 | 4.0 lb |
| US 6.5 / EU 40 | 3404-1332 | 8021506618744 | 4.0 lb |
| US 8 / EU 42 | 3404-1334 | 8021506618768 | 5.0 lb |
| US 11.5 / EU 46 | 3404-1338 | 8021506618805 | 5.6 lb |
| US 12 / EU 47 | 3404-1339 | 8021506618812 | 5.6 lb |
| US 12.5 / EU 48 | 3404-1340 | 8021506618829 | 5.6 lb |
| US 13.5 / EU 49 | 3404-1341 | 8021506618836 | 5.6 lb |
| US 14 / EU 50 | 3404-1342 | 8021506618843 | 5.6 lb |
| US 7.5 / EU 41 | 3404-1333 | 8021506618751 | 5.0 lb |
| US 9 / EU 43 | 3404-1335 | 8021506618775 | 5.0 lb |
| US 9.5 / EU 44 | 3404-1336 | 8021506618782 | 5.0 lb |
| US 10.5 / EU 45 | 3404-1337 | 8021506618799 | 5.6 lb |
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Free US shipping over $49
$9.95 flat rate under $49, free above it. Most orders dispatch within 1–2 business days and arrive 3–5 business days after that.
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Ships from five US warehouses
Your order leaves whichever warehouse is closest to you, which is what keeps transit times short across the country.
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Wrong size? Exchange or return it
Send it back within 90 days for a different size or a refund. It must be unworn, with all tags and labels. Return shipping is paid by the customer; there is no restocking fee.
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90-day returns, no restocking fees
Return any unused item in its original packaging within 90 days of delivery.
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Authorized dealer, genuine gear
Every item is sourced directly from the manufacturer or their authorized distributor — this one from Alpinestars.
Measure yourself, then compare with Alpinestars's own chart below. Between two sizes? Send us your measurements and a specialist tells you which size to order.
Alpinestars footwear size chart
Size conversion; JP size is your foot length in cm. This model's US and EU sizes match this table. Source: Alpinestars' official footwear size charts (alpinestars.com).
| US | EU | JP / foot length |
|---|---|---|
| 3.5 | 36 | 22.5 cm |
| 4 | 37 | 23 cm |
| 5 | 38 | 24 cm |
| 6 | 39 | 25 cm |
| 6.5 | 40 | 25.5 cm |
| 7.5 | 41 | 26 cm |
| 8 | 42 | 26.5 cm |
| 9 | 43 | 27.5 cm |
| 9.5 | 44 | 28.5 cm |
| 10.5 | 45 | 29.5 cm |
| 11.5 | 46 | 30 cm |
| 12 | 47 | 30.5 cm |
| 12.5 | 48 | 31.5 cm |
| 13.5 | 49 | 32 cm |
| 14 | 50 | 33 cm |
What riders say
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Why buy from Riders Miami
Riders Parts is the parts counter of Riders Miami Motorsports — a full motorcycle dealership in North Miami Beach with a showroom and a service department. Not sure about a size? The team at the parts counter helps you pick one before you order.
Visit the dealership (opens in a new tab)- A real dealership Riders Miami Motorsports: showroom and service department at 1926 NE 154th St, North Miami Beach, FL.
- Ships from 5 US warehouses Dispatched from whichever of our five US warehouses is closest to you, in 1–2 business days.
- Help with sizing Send the size you wear in another brand, or your measurements, and we tell you which size to order.
- Talk to a person +1 645-239-3174 · parts@ridersmiami.com · Mon–Sat 9–7, Sun 10–5.