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SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots
  • SIDI Fusion Boots

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Size Chart
$195.00 - $220.00
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Video Review

SIDI Fusion Boots Videos

Sidi Fusion Boots

  • Vertebra system Achilles and rear calf protection panel.
  • Replaceable nylon toe scuff pad.
  • Replaceable outer ankle protective cap.
  • Nylon shin deflector plate.
  • Fully encapsulated heel cup.
  • DuPont polymer toe shift pad.
  • An elastic panel adjacent to the entry zipper allows a bind free zip and improved fit.
  • Removable arch support.
  • Double stitched in all high stress areas.
  • Zipper and VELCRO® brand closures closure system.
  • Lorica outer construction.
  • Perforated Teflon treated nylon lining.

Mens and Womens Footwear

Footwear Conversion
EURO  US Mens US Womens
36 3-3.5 4.5-5
37 4-4.5 5.5-6
38 5-5.5 6.5-7
39 5.5-6 7-7.5
40 6.5-7 8-8.5
41 7-7.5 8.5-9
42 8-8.5 9.5-10
43 9-9.5 10.5-11
44 9.5-10 11-11.5
45 10.5-11 12-12.5
46 11-11.5 12.5-13
47 12-12.5
48 13-13.5
49 14
50 15

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

Click here to see the full SIDI Boots Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Black / 37 599880 2000000055992 Available: Requires 2-4 business days lead time prior to shipment.
Black / 38 599881 2000000056005 Available: Requires 2-4 business days lead time prior to shipment.
Black / 39 599882 2000000056012 Available: Requires 2-4 business days lead time prior to shipment.
Black / 40 599883 2000000056029 In Stock: Ships within 24 hours
Black / 41 599884 2000000056036 Available: Requires 2-4 business days lead time prior to shipment.
Black / 42 599885 2000000055879 In Stock: Ships within 24 hours
Black / 43 599886 2000000056043 In Stock: Ships within 24 hours
Black / 44 599887 2000000056050 Available: Requires 2-4 business days lead time prior to shipment.
Black / 45 599888 2000000056067 In Stock: Ships within 24 hours
Black / 46 599889 2000000056074 In Stock: Ships within 24 hours
Black / 47 599890 2000000056081 In Stock: Ships within 24 hours
Black / 48 599891 2000000056098 In Stock: Ships within 24 hours
Black / 49 599892 2000000056135 Available: Requires 2-4 business days lead time prior to shipment.
Black / 50 599893 2000000056142 Out of Stock


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We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
SIDI Fusion Boots 4.5 5 50 50
Strange fit... stylish, stiff.... Great looking, sturdy boot. Moderately priced. Good value. The fit, in my opinion, is actually on the large side. I bought a 44 and I am a US size 10.5. However, my heel has so much room and sits so far from the back of the boot, it almost feels as though my foot will slip out. Its not "uncomfortable" per se, but the weird thing is that it feels like my toes are pressed up quite far towards the tip of the boot. Very weird fit. I will also say that the stiffness of this boot has made upshifting VERY tricky. Sometimes I have been actually unable to get into the next gear without looking down and adjusting my foot position to get more leverage. Not ideal. Hopefully they break in some more and it gets easier. August 15, 2015
Awesome first boots! These were my first "track" boots so they felt rather different at first. After riding with them for a day, I was able to feel comfortable while riding. They are a bit large around the calf but then again my calves are small. These boots feel great, look great: defietly recommend them. April 13, 2015
Exactly what I was hoping for This was my first boot purchase. I'd tried wearing some timberland work boots before but the toe box had made it very difficult trying to shift and feel where my feet were, so I have just been riding in some custom extra high top converse. I was a little worried at first that I would have the same feedback and shifting problems with these, but there was no such issue. Took about 2 seconds to get used to them. Anyway- I usually wear about a 9 and have (I assume) average width feet, and the size 42 fit just right. I just unboxed my literally 2 hours ago, so they're still very stiff. I think they could do with a little padding on the inside to protect your foot from the hard parts but otherwise these seem very comfy. April 11, 2015
Nice boot I like the fit of these boots. I got a size bigger than I usually wear and they fit. They seem to run small. They are comfortable the top of the boot, is a little wide. March 16, 2015
Great Boot Bought this as my first set of boots. As a college student, I wanted something with a strong brand reputation, but also with a good price. I think I found it here. Boots feel very rigid and protective, but flex in the right places after a bit of break-in. Zipper and velcro is all well placed, and works perfectly. I can fit a set of jeans over them perfectly for running to the gas station, or put them on with my riding pants for long rides. From what I researched, they also seemed to hold up well with crashes from several other people, and that's the first comment that I look for before making a purchase. Only thing that I don't like about them is that they can be a little uncomfortable on your shin if your socks aren't long enough and you're walking longer distances, but that's more of a personal decision issue. February 7, 2015
Simple, comfortable, functional. Great boots! Everytime I have purchased proper boots for the job I have wondered, "why did I wait this long?" I have no idea why I waited so long to add proper motorcycle boots to my kit. My theme is black with red accents - it goes well with the RC-51. These boots fit the need. I refrained from the "air" version, I figured these would breath well enough with the bubble liner SIDI utilized. I was correct. Having worn these is 90* weather and made several stops, walking a fair amount, not overly hot for a full boot and absolutely no complaints in regard to comfort. Great boots! August 9, 2014
Great first boot Bought these as my first set of dedicated motorcycle boots. They fit true-to-size. Initially, I thought they ran small, but you really have to smack your heel back into the heel cup the first few times you wear them, before it stretches out. The Lorica imitation leather is really stiff at first, but does break in (despite what you may read elsewhere). July 18, 2014
Bottom Line is Excellent I owned these boots for almost two years and they were top shelf. Comfortable, sturdy and I think a good value. They were my first boot purchase in many years. They are a bit narrow at the toes but were okay for me. I think I'm an average D width. They run true to size so I'd recommend ordering your size normal shoe size. If you have an E or wider foot this may not be the boot for you. I'm ready to buy another pair of boots and I think I'm leaning again toward SIDI. Hope this helps you make your decision. May 28, 2014
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Use our Product Q&A for a chance to win our monthly $100 giveaways.

Have a functionality, fit, or otherwise product-specific question about the SIDI Fusion Boots? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

SIDI Fusion Boots
Already Asked: 10 Questions, 37 Answers
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RevZilla Store asked: Why did you choose this?
Robert U: reviews - first pair May 25, 2015
Drew H: Sidi boots have been my favorite for years. Great protection, style and fit. Easy to walk around in when not on the bike. Apr 19, 2015
David H: Sidi's reputation for quality products and style Mar 22, 2015
Frank B: Price and quality Dec 12, 2014
Howard L: Great pair of boots that offer much better protection than just ankle high boots but still at an affordable price. Jun 28, 2014
Paul W: To replace a set that has served me very satisfactorily. Jun 23, 2014
Joshua J: looked for a few months best price for protection but not over the top. May 3, 2014
Samuel W: Style, safety, comfort. Apr 13, 2014
andrew m: I always wanted a pair of SIDI boots Dec 12, 2013
Cornelius T: Recommendation from friend for dual purpose protection during riding and also able to walk and spend some time with my boots on the the office, Dec 11, 2013
O P: Vegan, Vegan, Vegan. Nobody gets hurt. Just don't stop carrying them!!!!! Dec 10, 2013
Patsy B: I like the look of this boot..can't wait to see it in person! Aug 26, 2013
Rudy R asked: Is the armor at the toe hard or soft? Does it fully encapsulate the tox box or is it just around the perimeter? Thank you. Jul 18, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Izolda T: The armor is hard. It feels hard all around. I'm not sure what you mean by the "tox box" so I'm not sure how to answer the question fully.

I can say that I love the boots. They are a bit narrow so if your foot expands a great deal when you step down, you might find them somewhat uncomfortable. Otherwise, they are super easy to wear and ride in.

Jul 23, 2014
Reply to Izolda Good answer? Yes (0) No (0)
ryan c: Armor on the outside is hard plastic. It goes from the outside behind where your pinky toe would be up to the middle toe area. however, inside the boot there is a hard plastic shell that goes all the way around and covers the big toe area. Jul 19, 2014
Reply to ryan Good answer? Yes (0) No (0)
Barry G: I have had my boots for about 4 months and they have been great. The armor is hard and it covers the area from the smallest toe to the center of the boot not covering the large toe. Jul 21, 2014
Reply to Barry Good answer? Yes (0) No (0)
andrew m: The armor is hard it's just on the toe box it can be replaced as it is screwed on Jul 18, 2014
Reply to andrew Good answer? Yes (0) No (0)
andrew m: The armor is hard it's just on the toe box it can be replaced as it is screwed on Jul 18, 2014
Reply to andrew Good answer? Yes (0) No (0)
Rudy R: Sorry I mean that if that toe slider wasn't there is there still soft or hard protection under the lorica for the toe box? Jul 18, 2014
andrew m: No it's soft under the toe protection Jul 19, 2014
Patsy B: Yes the tox box is hard, but the boot are comfortable and they keep my feet warm Jul 19, 2014
Reply to Patsy Good answer? Yes (0) No (0)
Mark L asked: Does this boot have steel shank reinforcement? Dec 10, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
JON F B: Hi Mark,

I bought a pair of these boots almost 2 years ago as a replacement for my old pair of Sidi's. I only wear these boots when I ride. If I have to do a lot of walking I take a pair of shoes with me to walk in. Do these boots have a steel shank? I cannot confirm this, but I can tell you the soles are very stiff in the arches. Could be steel in there. The rubber is almost 3/8" thick and they do not flex. I can walk pretty far in my old pair, but they are well broken in. I hope this info helps.


Dec 10, 2013
Reply to JON F Good answer? Yes (1) No (0)
Chris K: Yes, it does. It's a great boot, breathes well, and fits great. I have over 10,000 miles of sport touring on mine through all sorts of weather and and they have never disappointed. Dec 11, 2013
Reply to Chris Good answer? Yes (1) No (0)
Mark L: Thanks for the info. I'm a new rider and am realizing that the boots I purchased (AXO Drone) are more appropriate for track riding than the dual sport/touring I plan to do. A friend of mine sustained a gruesome injury on his bike in which he broke all five metatarsal bones and he told me that he will never wear a boot that doesn't have a steel shank again, as he believes it would have prevented his injury. Some people tell me it's not as important as my friend claims as long as the boot has other safety features, which these Sidi boots seem to have. Dec 11, 2013
Reply to Mark Good answer? Yes (0) No (0)
Bruce P: I don't think they have a steel shank, but the soles are engineered for racing stiffness. It's a very high quality boot.. Dec 10, 2013
Reply to Bruce Good answer? Yes (0) No (0)
Hadrian R: No reinforcement. A very supple street boot. Jan 21, 2014
Reply to Hadrian Good answer? Yes (0) No (0)
A shopper asked: can skinny jeans go over the boot or do they have to be tucked in? are these too stiff to walk around in? Oct 21, 2012
Answer this · Send to friends Good question? Yes (0) No (0)
Ian: I bet you'll have to tuck skinny jeans into these boots. When I pull my jeans over the top they feel fairly loose on my legs. The calf is pretty large since they seem to be intended for sportier riding and accommodating full leathers. They are somewhat stiff to walk around in but they don't take long to break in. The sole is pretty sturdy. Nov 26, 2012
Reply to Ian Good answer? Yes (0) No (0)
RevZilla: Skinny jeans can fit over top of the Sidi Fusion Boots. However, it's a stretch, literally, and probably not going to be good for the life of the jeans. Oct 22, 2012
Reply to RevZilla Good answer? Yes (0) No (0)
megaherz: you are gonna have to tuck these in, but it'll be tight with the lining. Nov 5, 2012
Reply to megaherz Good answer? Yes (0) No (0)
A shopper asked: Was told that these boots the sidi brand run small I wear a size 10 wide what size do you recomend ? Feb 6, 2015
Answer this · Send to friends Good question? Yes (0) No (0)
Lily B: They are narrow and whether you get a male or female size, it's the same unlike traditional shoes. The width of the calf room is also narrow. So if u have wide calves and small feet it might not work. Bigger feet= larger calves in these boots. Even though the Velcro strap is somewhat adjustable, there's very small room for adjustment. If you've never used this brand boot before, you might want to see if you can find one at a bike shop that u can try on. Wearing them for the first time can be a little difficult because they're very stiff but once you break them in like any shoe, it should get better. If u have wife feet or calves, you might wanna go for a different brand; as I mentioned earlier; these are narrow in the toes and calves. Personally, I prefer my combat boots. Good luck. Hope this helps. Feb 7, 2015
Reply to Lily Good answer? Yes (0) No (0)
holly o: I am a size 6 and they were true to size. I wear Sidi motorcycle socks inside them, not too thick, not too thin. Feb 13, 2015
Reply to holly Good answer? Yes (0) No (0)
A shopper asked: I'm a year-round commuter meaning there will be some rain at times. Also a moderately aggressive rider when it's dry. Any thoughts on the Sidi Fusion Rain vs the TCX S-Sportour Waterproof boot? And is the Sidi Fusion Rain no longer available here? It is referred to in the video but not found otherwise on the site. Aug 15, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
thomas s: I have not used them in the rain yet. If your feet get hot you might consider the vented boots. I am thinking that I would use a boot cover in case of rain, since it is so infrequent. Aug 20, 2014
Reply to thomas Good answer? Yes (0) No (0)
John B: I don't have the waterproof versions, not familiar with the TCX's either. I'm a mostly fair weather rider. Sorry. Aug 15, 2014
Reply to John Good answer? Yes (0) No (0)
A shopper asked: Is the toe box armor soft or hard? Jul 18, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Hadrian R: They have a stiff (ish) leather toe, but there is a fair bit of support and protection from the sliders .
Nice simple boots
Jul 18, 2014
Reply to Hadrian Good answer? Yes (0) No (0)
John B: It's boxed and quite tough. Aug 15, 2014
Reply to John Good answer? Yes (0) No (0)
A shopper asked: Trying to decide between this and the Fusion Air, as I will be using these mostly for commuting, morning/evening rides in the midwest. Mar 2, 2013
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Techie823: I have the Latigo's and you can feel the air flowing through the top of the foot, I have worn them in 39¬?F and my feet got cold fast. The top section may keep your calf area warm though, not 100% as I wore pants over the top section of boot, only have had up to 60¬?F weather. Mar 11, 2013
Reply to Techie823 Good answer? Yes (0) No (0)
gotanewjacket: I wear these in 90+ temps in Georgia and the heat hasn't been a problem, however there is zero air flow with these. Apr 9, 2013
Reply to gotanewjacket Good answer? Yes (0) No (0)
A shopper asked: Can anyone tell me the average weight of this boot? Oct 4, 2012
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Mondomerve: They are not heavy at all. When you put them on it feels exactly as you would expect them to. The have no burdensome weight to compensate for the low price, if that's what you were thinking. Dec 17, 2012
Reply to Mondomerve Good answer? Yes (0) No (0)
RevZilla: The size 43 SIDI Fusion weighs 1lb 10oz per boot. Oct 5, 2012
Reply to RevZilla Good answer? Yes (0) No (0)
A shopper asked: Are these boots resoleable? Feb 19, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
RevZilla: Yes, these boots do have a replaceable sole. However, we would not recommend doing it yourself and suggest taking it to a cobbler and have them do it for you. Feb 20, 2013
Reply to RevZilla Good answer? Yes (0) No (0)