Alpinestars S-MX R Boots
- Updated design makes the S-MX R an even more accomplished road and track performer
- Greater flexibility and comfort, combined with its lightweight and ergonomic shaping using high tech microfiber, give superb riding control and safety performance
- Contoured shin plate protection with high modulus TPU injection has been re-profiled to improve forward flex performance whilst providing highly effective impact and abrasion protection
- Air scoops are upgraded and give effective ventilation
- Ankle and calf protection is dual molded to improve material hardness and contoured to allow the Achilles flex bellows to wrap around the ankle
- Additional calf support is given by a molded logo tab behind the gusset
- Injection molded support gasket has been added to control support and stiffness in the ankle area
- Wide and ventilated injected TPU heel counter structure is combined with an internal shock absorbing padded insert and memory foam ankle guard
- Inside lower heel grip with a smooth inner profile gives good feel and control
- Asymmetrical “throat” design bellows area has been profiled to flow over the medial side forefoot to aid flex and promote natural movement
- Shifter pad and forefoot protection has been enlarged and uniquely styled with over-injected TPU inserts
- Side entry zipper and expansion panel allow easy entry and exit with wide opening aperture and improved general fit
- Micro adjustable, replaceable, ratchet closure with recessed locking buckle and hidden strap around the calf, provides additional accuracy and security, in addition to the hook-and-loop flap closure over the entry/exit zip
- Synthetic inner lining in open cell foam for comfort and long-lasting freshness
- Highly breathable lining in the ankle and forefoot areas
- Interchangeable, bi-injected, toe slider
- Removable, replaceable contoured footbed, sculptured with Alpinestars’ exclusive PU foam, provides improved arch support and increased forefoot pedal feel
- Exclusive rubber compound sole is highly durable and gives superb grip on the foot pegs and high level of pedal feel
- Internal molded shank
- A fully perforated version of the S-MX R provides higher levels of ventilation for hot climates (available in black only)
- CE certified
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Sizing Information
The overall fit/size of this new style seems “true” to their published size chart (see below). Personally, I’ve always found Alpinestars to be more roomy through the foot and instep than other race boots (such as Sidi), but this style feels more form fitted to me. I’d say the width is no wider than D (call it C or D). The calf size is somewhat adjustable but not highly adjustable, so those with very large calves will have trouble with fit.
| Euro | Men’s US | Women’s US |
| 38 | 5 | 7 |
| 39 | 6 | 8 |
| 40 | 6.5 | 8.5 |
| 41 | 7.5 | 9 |
| 42 | 8 | 10 |
| 43 | 9 | 11 |
| 44 | 9.5 | 11.5 |
| 45 | 10.5 | - |
| 46 | 11.5 | - |
| 47 | 12 | - |
| 48 | 12.5 | - |
Product Video
Our Two Cents
In trying on these boots, I find I like them more than I like other Alpinestars boots. The boots feel more form fitted (see my comments above), and feel like they have a comfortable pre-curved shape for sport bike riding. Alpinestars lists a bunch of reasons for the improved fit in their literature (see above), some of which is unintelligible to me, but I will admit I feel a big improvement in the overall fit. Like other top quality race boots, these offer a host of protection features. The molded protectors on the shin, ankle and heel areas give the boot a lot of style too. I also like the molded-in venting. It looks like it would provide a great deal of venting in hot weather. Take the “View Larger Pictures” link above to see some good close-up pictures.
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