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Alpinestars S-MX 2 Boots
  • Alpinestars S-MX 2 Boots - Black
  • Alpinestars S-MX 2 Boots - Red

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Alpinestars S-MX 2 Boots Videos

Alpinestars SMX 2 Boots

  • Low cut street riding boot, giving ultimate flexibility and uninhibited ankle movement, while retaining comprehensive foot protection and riding performance technology
  • Inner side zipper, with Velcro© over flap closure, make entry and exit highly convenient
  • Heel protection detail and toe shifter pads
  • Replaceable TPU toe-sliders
  • Molded rubber sole with internal shank for rigidity and protection

Alpinestars Men's Footwear Size Chart:

Use this chart for Euro-sized footwear
EU Size USA Size
36 3.5
37 4
38 5
39 6
40 6.5
41 7.5
42 8
43 9
44 9.5
45 10.5
46 11.5
47 12
48 12.5
49 13.5
50 14
Use this chart for USA-sized footwear
USASize  EU Size
5 36
5.5 37
6 37.5
6.5 38
7 38.5
7.5 39
8 40
8.5 40.5
9 41
9.5 42
10 42.5
10.5 43
11 43.5
11.5 44
12 45.5
12.5 46
13 47
13.5 47.5
14 48

BOOT SIZING NOTES: In RevZilla's experience we have found the EUR->US sizing conversions as presented here to be slightly off. Below is RevZilla's recommendation for Men's Boots. 

EU Size

USA Size
42 8
43 9-9.5
44 10-10.5
45 11

As always, this size chart is only a guide and provides no guarantees of a perfect fit.

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full Alpinestars Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Black / 38 304437 222408-10-38/34010062 In Stock: Ships within 24 hours
Black / 39 304438 222408-10-39/34010063 Out of Stock
Black / 40 304439 222408-10-40/34010064 Out of Stock
Black / 41 304440 222408-10-41/34010065 Out of Stock
Black / 42 304441 222408-10-42/34010066 Out of Stock
Black / 43 304442 222408-10-43/34010067 Out of Stock
Black / 44 304443 222408-10-44/34010068 Out of Stock
Black / 45 304444 222408-10-45/34010069 Out of Stock
Black / 46 304445 222408-10-46/34010070 Out of Stock
Black / 47 304446 222408-10-47/34010071 Out of Stock
Black / 48 304447 222408-10-48/34010072 Out of Stock
Black / 49 304432 222408-10-49/34010073 Out of Stock
Black / 50 304448 222408-10-50/34010074 Out of Stock
Red / 38 304449 222408-30-38/34010088 In Stock: Ships within 24 hours
Red / 39 304450 222408-30-39/34010089 Out of Stock
Red / 40 304451 2224083040/34010090 Out of Stock
Red / 41 304452 2224083041/34010091 Out of Stock
Red / 42 304453 222408-30-42/34010092 Out of Stock
Red / 43 304454 2224083043/34010093 Out of Stock
Red / 44 304455 222408-30-44/34010094 Out of Stock
Red / 45 304456 2224083045/34010095 Out of Stock
Red / 46 304457 2224083046/34010096 Out of Stock
Red / 47 304458 2224083047/34010097 Out of Stock
Red / 48 304459 222408-30-48/34010098 Out of Stock
Red / 49 304433 222408-30-49/34010099 Out of Stock
Red / 50 304460 222408-30-50/34010100 Out of Stock


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Alpinestars S-MX 2 Boots 4.5 5 49 49
Good Boot These are really good boots for the money. Protection is great and they are very comfortable. There is no airflow so these are terrible for summer riding (which I'm doing at the moment) but Alpinestars has a vented version of this boot so I won't knock anything off. My only complaint is how hard it is to open the clasp on the strap. I have to just leave them closed as it would hurt my hand trying to get it open, I also had to trim the strap as I couldn't get the boot tight enough and the hard plastic was digging into the boot. Overall it's a great pair of boots. Protection is better than any regular shoe and that's what's really important. July 9, 2015
Awesome boots!!! If you are looking for something more than tennis shoes/work boots, but don't want a full on race boot, these are the ones to get! I have been holding out for the right pair for a long time and I am super happy with them! Go about 1 full size smaller than your normal tennis shoe size. I normally wear a 10 but a 9 in this boot fits me perfect. June 29, 2015
best boots ever I just got my pair of sm x 2 boots and I love em they are very confortable, quickly to put on and take of, very safety, the protect your whole foot, and they are ready to those long rides because they ate very lightly February 16, 2015
Awesome boots I normally wear a size 13 Nike but am in a size 47 of these boots and I have very wide feet so I normally have to go up a size. These are great boots much more waterproof then my faster vented shoes and I love the fact I just slip them on a zip them up after setting the adjustment strap once. These also seem to make it easier to shift. I wear these all day on and off the bike and they are very comfortable. December 29, 2014
right boot, right choice I own a C109RT Suzuki and love this boot. My trips are on an average of 2 to 4 hrs and the S-MX2 is a good buy. No laces, just a zipper, velcro and a buckle lets you get in and out of this boot quickly. Very comfortable, so if needed you can stay in this boot all day. They're not heavy or bulky but still offer great protection. Alpinestars did a good job on this one. I did some research and commend RevZilla for the great video breaking down this boot. I had no problem with the sizing. For me it was spot on. Looking forward to many more cruises. September 27, 2014
Nice Boot! I did a lot of research before I purchased. I ride everyday as a commuter and spirited rides on the weekend. I wear a 10 1/2 US, a 44 fits perfect. Style is very nice goes well with my jeans, I stop at the grocery or convenience store on the way home from work and no one looks at me like I am Darth Vader! Felt great walking in them out of the box. Protection, Nice ankle support and toe box, shifting feel is positive. Kind of warm in the Texas Sun, not unbearable though. Overall Happy! August 6, 2014
Comfy and stylish boot The S-MX2s are really comfortable straight away. I was very happy with them on my first ride. Well done Revzilla I received my boots in Australia five days after I placed my order - really good service. July 14, 2014
Great low boot! I have a tough time buying shoes, boots, etc on line because I have wide feet. I wear an 11 EE-EEEE (depending on the make). I had a good buy from Revzilla with a A-Stars boot but had to send them back for the next size up. The EU 46 fit wonderfully and I love them, but I was in the market for something a little lower for commuting and shorter rides, a little easier to put on and take off. I ordered a different pair that were narrow then not available in larger size, had to send them back. Shopping again I found these and ordered a pair in the hopeful same size 46. The fit was perfect right out of the box! Definitely roomy and wide. Absolutely perfect for me. So much so I suggest a size down of you tend toward a smaller fit. I would have given all Excellents but can't yet say on the Protection and Durability. Highly recommend, especially for fellow duck feet :-) June 2, 2014
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Have a functionality, fit, or otherwise product-specific question about the Alpinestars S-MX 2 Boots? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Alpinestars S-MX 2 Boots
Already Asked: 11 Questions, 49 Answers
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RevZilla Store asked: Why did you choose this?
Kyle T: These boots have great reviews, they look awesome, and the price was right! Jun 10, 2015
jeffery m: great low top boot for casual riding May 22, 2015
john a: "Read great reviews on this helmet & all were accurate! Very pleased with my purchase." Apr 11, 2015
Jesse K: Comfortable boots that offer protection and style. Apr 7, 2015
Dan C: nice Oct 3, 2014
Kip S: good looks and features that i want Sep 1, 2014
Ryan F: I needed more protection than just regular shoes. As a bonus, they are pretty comfortable too. Aug 14, 2014
C E: It is a great low boot. Excellent product and good price. I could not be happier with this purchase. Aug 1, 2014
William M: Good, sturdy boots. Fair price, have withstood a hell of a beating with minimal signs of wear and tear. Jul 22, 2014
Louis-Daniel B: didn't want to go full boots but but still wanted some ankle protection..also wanted something that i could remove fairly quickly and that were comfortable. these did it. Jul 9, 2014
fred s: I drive 7000 miles per year. Looking for a quality light weight boot Jun 29, 2014
Ray D: Because Alpinestars is a quality brand and these boots are highly recommended. Jun 25, 2014
MELVIN H: I chose these because of the prince, the reviews and the look. They are very comfortable. My only issue is they need another strap-down ratchet latch below the one manufactured--which should be up a little higher, which would really offer a tight grip. I bought another pair after these, which were discontinued on Revzilla but that I found on another website, which had a two-strap ratchet system and fit superbly with great support! May 1, 2014
Michael H: Needed riding boots. Apr 9, 2014
Sandro R: Wife's input as for a good style with jeans. Apr 3, 2014
Nnamdi N: Through word of mouth. I was told it's easy on the feet and i think it looks good. Mar 27, 2014
Timothy W: I like Alpinestars and my Icons were getting worn out. Mar 19, 2014
Robert S: great boots. still has great ankle support looks and feels comfortable! Mar 4, 2014
David M: I liked the fit of the S-MX1, So I went for the S-MX2 it is a little wider ! Feb 4, 2014
Jason B: Quilty comfort finish price Jan 17, 2014
abraham g: I needed something more then just sneakers and these stood out from the rest. Dec 16, 2013
John A: need an everyday boot and the reviews on this boot were good... Oct 3, 2013
T H: kicking boots.. very comfortable, stylish Aug 12, 2013
A shopper asked: Measured on a Brannock Devise (foot measure) I am a true US 9D. However, I find that I often need an 8.5 in shoes without laces to prevent heal slipping. I currently wear a pair of AlpineStar One O One riding shoes. They are lace ups and the US size 9 fit perfectly. But since these shoes don't have laces and since the European to US chart doesn't shot a conversion for 8.5, I'm not sure what size to order. Should I go with the 42 which Revzilla says is like a US 8 or go with the 43 which Revzilla says is like a 9 to 9.5?

Any help or suggestions will be appreciated.
Oct 14, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
A s: Greetings,

I checked all of my daily wear shoes and I wear a US size 9. Each pair of shoes fit comfortably throughout the day. Having said this, I own two pairs of Alpinestars footwear.

1) Alpinestars miglia shoes - The tag says US 9 / EU 42. These shoes fit perfectly, as if they were custom made for me.

2) Alpinestars S-MX 2 Boots - The tag says US 6.5 / EU 40 These shoes also fit perfectly, as if they were custom made for me.

So, my conclusion is that the Alpinestars sizing chart for the shoes differs from the boots. I would go for a size EU 40 / 41 in the S-MX 2 Boots...

Hope this helps.
Oct 17, 2013
Reply to A Good answer? Yes (0) No (0)
James M: I'm a US 9.5 D to 10 D depending on the shoe style, consistently a 42 Euro. If I remember correctly, Revzilla recommends going up one size which I did. A 43 fits me perfectly with no slippage. The buckle strap adjusts to pull your foot back in the shoe...no need for laces. Once the buckle strap is adjusted, the shoe goes on and comes off by only unzipping the side zipper.

Probably a 42 would fit you just fine.

Hope this helps.
Oct 15, 2013
Reply to James Good answer? Yes (0) No (0)
Saed Z: These boots run small !!! I wear a size 10.5 shoe (US) and ordered the size 44 which according to the conversion chart would be a 9.5 (US) and the boots fit me perfectly. I'm glad I didn't follow the conversation chart or I would have ended up with boots that were too large.

Oct 15, 2013
Reply to Saed Good answer? Yes (0) No (0)
Jeffrey H: I think you'll find the 43 to be the best fit. I've had problems with heel slippage in other shoes, but no problem with these. I wear 9 in dress shoes and 9.5 in tennis shoes. I have a narrow foot. Hope this helps. I've really enjoyed these boots Oct 16, 2013
Reply to Jeffrey Good answer? Yes (0) No (0)
Saed Z: Sorry in my previous reply I meant to say the boots run large not small. I would order 1 size down from what the Alpinestar chart recommends. Oct 15, 2013
Reply to Saed Good answer? Yes (0) No (0)
Alejandro R asked: To those of you who are a size 13 shoe, what size did you order these boots in, 47 or 48? Apr 14, 2014
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Dan C: Dude. Order both and return one. It's Revzilla, bro. Apr 15, 2014
Reply to Dan Good answer? Yes (1) No (0)
James M: Don't know whether or not this will help, but Revzilla recommended 1 Euro size up from my norm...43 when my norm is 42. The shoe fits perfectly and very comfortable. I would buy again.
Based upon my experience with the smaller sizes above and where a 13 US size falls on Alpinestars' chart, I think you need to order a 49 (since a 13 falls between a 48 and 49 on the chart).
Hope this helps.
Apr 15, 2014
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Eric M: I found that my boots fits perfect. but mx2 same size a bit big. so watch for that May 21, 2014
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Datwan H asked: SMX 1 or the SMX 2?? Looking for something that's comfortable on and off the bike but also has a good amount of protection. I live In Florida and the SMX 1 seems like it would have better air flow but SMX 2 appears a bit beefier thus being more productive. Thanks in advance. Mar 20, 2014
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Lawrence H: I went through the same thing. I bought the S-MX 1 for the same reason -- I live in Florida too. You do feel the airflow on the top of your foot where it's the "mesh" material on the S-MX-1. I did try the S-MX 2 on and they are beefier (I do like the moto-X type buckle) but the airflow on the S-MX 1 was the winner for me. Walked around during Daytona Bike Week with them, no problems, at least for me. Bottom line, you can't go wrong with either boot. Mar 20, 2014
Reply to Lawrence Good answer? Yes (1) No (0)
Saed Z: The SMX 2 is a much higher quality boot. The entire boot is leather and has an ankle buckle like a ski boot instead of the cheaper quality leather/mesh combo and cheap velcro strap found on the SMX 1. It will also offer much better protection if you get caught in the rain. Sizing runs big so keep that in mind when you order. I am a true size 10.5 (U.S) and I ordered the size 44 and they fit perfectly even though Alpinestar chart indicates that it would be equivalent to a 9.5 (U.S) so make sure to order a full U.S. size down from what you would normally wear. Mar 21, 2014
Reply to Saed Good answer? Yes (0) No (0)
Marcelo F: I never tried the SMX-1 But I am very please with the SMX -2. I use them the whole year summer or winter. They are very comfortable and provide a good feeling (very close to the feeling of a competition boot). Of course you would prefer a boot with better air flow for the summer but this one can stand hot weather acceptably. Mar 21, 2014
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A shopper asked: Is this boot fine for wide feet? Nov 2, 2011
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AliB: Alpinestars boots tend to run slightly narrow and especially in their sport-boot line up. If you have very wide feet, you might want to look at a TCX boot, which tend to run wider than Alpinestars. As WallE replied below, if your foot width is no wider than a 4E, these should work for you. Nov 11, 2011
Reply to AliB Good answer? Yes (1) No (0)
KenS: Absolutely. Compared to other A-Star boots I would say this one has a wide width which forced me to go down one size. If you have wide feet you should be good to go. Jun 5, 2012
Reply to KenS Good answer? Yes (0) No (0)
WallE: yes this boot works well for people with wide feet. I usually wear an 11 2E up to a 4E in shoes and I have had no problems with this boot being tight. Nov 8, 2011
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A shopper asked: I am interested in the Alpinestars S-MX 2 Boots, I am Australian. My Shoe size in Aust is a 10 to 10.5, according to a guide I read that means I take a 11 to 11.5 in US size. Equaling it out it means I need either a 44 or 45 in EU size. I was thinking that a 44 would be better for after stretching and settling it would fit properly. Would this be the right size for me for these boots and would you agree with the conversion I have done? I really don't want to purchase the wrong size boots. Feb 1, 2015
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Dwain H: I cannot remember the conversion but what I can say is that I wear a US size 13 and bought the US 12.5 or size 48 and it was spot on in terms of fit... no stretching required and very comfortable to walk around unlike my cortech boots. Hope this helps. Feb 17, 2015
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salim r: I wear a size 11 to 11.5 in US shoe size. I wear a 45 in Alpinestars boots. Mar 10, 2015
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A shopper asked: ? hi I take a size 7uk and have read that all the mx 2 are slightly larger, should I then order the EU size 40.thank you. Jul 18, 2014
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derek h: The boots do run a full size larger. I wear a size US 10 1/2 so I ordered the euro size 44.. The box says the US size in the 44 is 9 1/2. but they fit perfect so in actuality they are a 10 1/2. Hope that helps.... Jul 19, 2014
Reply to derek Good answer? Yes (0) No (0)
Aly Hassan Aly H: I usually wear size 43 but in the mx2 I bought size 42 and its fit me so well perfect. Jul 18, 2014
A shopper asked: I wear a 7.5 to 8 in woman's sizes. What would the equivalent men's size be for me? May 1, 2011
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Chris K: A 7.5-8 in womens would be a 6-6.5 in mens, so that converts to a 38-38.5 in European. Typically mens shoes fit wider than womens, so even though the 38 is on the small side, it should compensate for a thinner foot. May 2, 2011
Reply to Chris Good answer? Yes (0) No (0)
Jake D: Normally the size difference is about 1.5 sizes. So you're 7.5= a 6 in mens. Unfortunately I doubt that you would fit them! May 4, 2011
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A shopper asked: These good enough for track day? Aug 19, 2015
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Mark K: No. Oct 16, 2015
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A shopper asked: I see the white version is vented but the others version are waterproof? Jan 23, 2013
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RevZilla: The Alpinestars S-MX 2 Boots will hold up against a light drizzle, but they are not waterproof. Jan 23, 2013
Reply to RevZilla Good answer? Yes (2) No (0)
A shopper asked: Is the Buckle on the SMX-2 Boot metal on metal or metal on plastic? Jun 9, 2011
Answer this · Send to friends Good question? Yes (0) No (1)
Matt01SS: The buckle is metal on plastic. There is a metal cylinder within a plastic latch that locks onto another tough plastic piece to hold it in place. Oct 10, 2011
Reply to Matt01SS Good answer? Yes (0) No (0)
KenS: The buckle is all plastic but very robust. There is no major stress on it so I don't suspect that it will fail over time. Jun 5, 2012
Reply to KenS Good answer? Yes (0) No (0)
PDXgearhoarder: You're not gonna believe this. Plastic on plastic.

Not kidding. I had to double check myself. Wow.
Oct 13, 2012
Reply to PDXgearhoarder Good answer? Yes (0) No (0)
tomZilla: The entire buckle is made out of Plastic on the SMX-2 Boot. Jun 9, 2011
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