The Alpinestars SMX Plus motorcycle boots provide lightweight, high-performance protection for sport and track riding. This black, white, and yellow fluorescent model features an advanced microfiber upper that balances abrasion resistance, flexibility, and comfort. The US 9.5 / EU 44 fit is identified by manufacturer part number 2221019-125-44 and vendor part number 2221019-125-44.
Protection is built around Alpinestars’ Multi-Link Control system, which supports ankle articulation while limiting hyper-torsion, hyper-extension, and hyper-flexion. External ankle and Achilles protection helps manage impact forces, while the contoured high-modulus shin plate improves impact and abrasion resistance. Replaceable dual-density TPU toe sliders, a replaceable heel slider, and an external side heel slider provide coverage and are designed to help dissipate impact and promote sliding during an accident.
Comfort and mobility are supported by flexible accordion microfiber panels at the front, Achilles, and outer entry area. Large asymmetrical accordion zones improve forward and backward movement, while the speed-lacing closure and lateral zipper deliver a precise, secure fit. The Alpinestars Lace-Lock System uses a durable polymer resin for quick adjustment, and the hook-and-loop tab keeps the zipper pull secured. Breathable lining in the ankle and leg areas, open-cell foam cushioning, and an anatomical replaceable EVA footbed support comfort and pedal feel.
A durable rubber sole provides consistent grip and riding feedback through an evenly textured surface. The Alpinestars SMX Plus boots are designed for riders seeking integrated ankle, shin, heel, and toe protection without sacrificing flexibility. Always confirm sizing and motorcycle boot fitment before installation or use.
Features:
- Size: US 9.5 / EU 44
- Model: SMX Plus
- Brand: Alpinestars
- Manufacturer part number: 2221019-125-44
- Vendor part number: 2221019-125-44
- Color: Black, white, and yellow fluorescent
- Upper: Lightweight microfiber construction with abrasion-resistant flexible panels
- Ankle protection: Multi-Link Control system limits hyper-torsion, hyper-extension, and hyper-flexion
- Sliders: Replaceable TPU toe slider, heel slider, and external side heel slider
- Shin protection: Contoured high-modulus shin plate
- Closure: Inner instep speed lacing system, lateral zipper, and Alpinestars Lace-Lock System
- Comfort: Breathable lining, open-cell foam cushioning, and replaceable anatomical EVA footbed
- Sole: Durable textured rubber sole for consistent grip and riding feel