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  • SIDI ST Boots - Black
  • SIDI ST Boots - Black/White
  • SIDI ST Boots - Black/White
  • SIDI ST Boots - Black/White
  • SIDI ST Boots - Black/White
  • SIDI ST Boots - Black/Red
  • SIDI ST Boots - Black/Florescent Yellow

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Video Review

SIDI ST Boots Videos

Sidi ST Boots

The SIDI ST Boot features an easy entry system as well as the finest support and protection features.


  • The patented and trademarked Vertebra System™ protects the rider’s Achilles tendon.
  •  Thermoplastic resin ankle protection.
  • Bolt on (no Velcro™!) replaceable, adjustable and aerodynamic nylon scuff pads on the toe.
  • Composite inner sole.
  • Removable arch support.
  • Nylon shin deflector plate.
  • Lorica outer construction.
  • Double stitched in all high stress areas.
  • All bolt on parts are replaceable.
  • An elastic panel adjacent to the entry zipper allows a bind free zip and improved fit.
  • Dual compound sole.
  • DuPont polymer toe shift pad.
  • Perforated Teflon treated nylon lining.
  • Replaceable shock absorbing heel cup.
  • Padded Achilles area.
  • External Ankle Support Braces with Closable air vents
  • Cam-lock buckle system.
Write a Product Review for a chance to win our monthly $100 giveaways.
SIDI ST Boots 4.9 5 48 48
Love them I ordered these boots from Rev for two reasons. One no sales tax and two you earn cash towards your next purchase. Thank You Rev for that. Now for the boots. These things feel and look awesome. They are comfortable and I definitely feel like they will protect me in a crash. I have not crash tested them but I would definitely buy them again when needed. July 4, 2015
Best Boots Out There Fit true to size. Very comfortable to ride in. Very stiff at first but once you break it in they work great, only took a couple hours of walking around the house. June 11, 2015
Nice boots but not as protective as their appearance suggests Ordered these and am sending them back. Fit is great- I have another pair of Sidi's in 44 and these fit exactly the same, and true to size (I wear size 10 New Balance). Protection isn't what i expected from the appearance though. The plastic bracing pieces aren't very stiff and you can fold the boot in half pretty easily just with your hands so these really won't stop a lot of torque if your foot hangs up in a slide or impact. I wound up going with Supertech R's which aren't a whole lot more rigid either unfortunately but the bootie design keeps the protection closer to the ankle and feels more secure. These are definitely beautiful boots and they do offer decent protection and great style, just not rugged enough for my taste. June 8, 2015
Great Product Overall is a great product for multiple use not just racing. April 27, 2015
Hawaii rider Good fit, comfy even to wear walking around. Had to break them in before I could feel the bike but once they were done they are awesome! Decent airflow, good support, nice and grippy on the pegs. And the black florescent yellow color is brilliant! February 18, 2015
Couldn't have asked for more I've had the boots for a few weeks, and rode in both extremely hot (90+) and cold weather (40) degrees, and during all my rides they've been comfortable. I've always worn wool socks with them to help with the calf area (make them a little more snug), and when it's hot I just open the vents on the side which allow great airflow. The opening of the boots is really large, which I'm is a design feature for those who'll wear them with a race suit. There are adjustable straps you can use to tighten them up, and the closure locks down really tight. I've only worn mine with jeans, and like the look. They come up just a few inches shy of my knees, so they offer protection for your entire lower leg. The soles of these boots are awesome, and I no longer have vibration foot fatigue. The soles are also more than adequate for walking, and even with the ankle protection the boots are flexible. I'm really happy with the purchase, and wish I had made the purchase earlier. Boots are highly recommended. November 20, 2014
Best Boots These boots fit well, very comfortable on long trips (8hrs) October 27, 2014
Cool boots, lots of protection Lots of protection particularly in the ankle and leg. A bit difficult to walk around in but that's not what they're made for. I wear a 9 1/2 and the 44 is a bit cramped in the toe box but with thin socks it works ok. Compact enough to work well if your bike doesn't have a lot of space between foot peg and shift lever. October 26, 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 ST Boots? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Already Asked: 9 Questions, 47 Answers
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RevZilla Store asked: Why did you choose this?
A S: Track day coming up! Sep 1, 2015
Kaleb J: I watched the review on the webpage and felt this item would be a good choice for my riding style. Jul 8, 2015
D O: Research and reviews. Jul 5, 2015
Eleazar H: comfortable, adjustable, fits very comfortable on the calves and stay cool Jun 9, 2015
Francisco H: Looks & safety features May 19, 2015
Victor W: Bought these in store. These were recommended for my budget and they felt fantastic. May 15, 2015
Jose O: This boots give me protection, confidence, are pretty and have a good design. Mar 9, 2015
Fares Y: Well reviewed, looks great. Feb 20, 2015
Thomas K: 1) bad-ass looking ;-) 2) visuals give me the sense that my foot and ankle would be well-protected. Jan 29, 2015
Steve P: Wanted a pair of full coverage well made and designed boots with good venting that can be shut off. Have trusted Sidi wares in the past. Nov 10, 2014
Lorraine K: My husband really wanted them! Nov 5, 2014
Brendan D: Best Protection Oct 10, 2014
Daniel C: Love these boots, full protection and a great fit. Fantastic for touring and more. Sep 23, 2014
Luis Alfonso A: the best brand on boots Aug 5, 2014
Scott H: Great reviews, sweet looking boot, and excessive safety features. Jun 22, 2014
Susannah T: protection, features May 22, 2014
Gregory C: I chose the SIDI ST boot because of the experience I had with my other SIDI boots. I have been wearing a pair of SIDI "On Road" Gore Tex adventure style boots for about two years now and they've been great. I anticipate the same build quality and performance from the ST model. Mar 18, 2014
Tony B: I've worn Alpinestars for years and these are simply the new standard. Dec 31, 2013
Jerome M: Great boot Oct 30, 2013
P N: Excellent boots! Sep 12, 2013
Andres G: Great protection, security at racing days. Sep 5, 2013
Stephen H: Top quality, high level of protection and comfort. Aug 10, 2013
A shopper asked: which are better boots comfort wise Sidi st or Aplinestars smx plus ? Aug 19, 2013
Answer this · Send to friends Good question? Yes (1) No (1)
Adam W: I can't speak to the Alpinestars, but the Sidi ST boot is very comfortable. I have a pair of Sidi sport touring boots without the external protections and honestly the STs with toe, heel, and ankle hardware external is just a s comfortable on the bike. They are less good for walking around, but fine for social/food/etc stops when out riding. The STs are every bit a day long boot. Aug 19, 2013
Reply to Adam Good answer? Yes (0) No (0)
Andres G: Hi, for me i bought this boots just for race on track and are fantastic, i feel very protected in everything, riding on track feels great, and when i have to walk with this boots there is the issue i feel walking like a robot or when you are at snow with ski boots not confortable for walk not even a block in the street. Aug 20, 2013
Reply to Andres Good answer? Yes (0) No (0)
Chase G: I find that both are comfortable but I wear the Alpine stars far more often, they are not as stiff and feel better for longer rides on and off the bike. Cheers. Aug 20, 2013
Reply to Chase Good answer? Yes (0) No (0)
Nathan W: From what I have seen A* typically fits folks with larger calves and wider feet better. Once broken in the ST's are a very nice boot. Aug 29, 2013
Reply to Nathan Good answer? Yes (0) No (0)
Kevin M: The Sidi boots are much more comfortable they are also easy to get on and off and protect the foot and shin very well. Aug 19, 2013
Reply to Kevin Good answer? Yes (0) No (0)
Alvin T: My Sidi ST hurtsmy pinky toe especially if i do any sort of walking in them. Not very comfortable, but manageable. Aug 20, 2013
Reply to Alvin Good answer? Yes (0) No (0)
Edwin Garcia Corado/YO C: if you have thin foot sidi because the boot is tight, if you have wide foot alpinestars Aug 19, 2013
Tony B: I have both and the SIDI ST has more mobility. Jan 11, 2014
Reply to Tony Good answer? Yes (0) No (0)
adam h: Sidi for sure, these boots are simply awsome. Aug 20, 2013
Reply to adam Good answer? Yes (0) No (0)
A shopper asked: How do these boots feel with the vents closed in dry and cold weather (30-50 degrees)? Nov 22, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Adam W: These boots are either airy, or very airy. Which is to say in cool weather with the vents closed there is still a good breeze coming through, more than you'd experience with any non-vented boot. In cool weather if you want to really have warm toes you'd have to consider a gore-tex or similar sock. Nov 25, 2014
Reply to Adam Good answer? Yes (1) No (0)
Roland H: I have never felt cold in the boots when wearing typical athletic socks. However,the soles on the boots are very thin and lack grip so on wet days be careful when planting your feet on the ground on slippery surfaces. Nov 23, 2014
Reply to Roland Good answer? Yes (1) No (0)
John W: Thank you for your help. Can you also mention what were the coldest temps you've ridden in these boots with normal socks, and you were still feeling comfortable? Nov 23, 2014
James S: I can say that in the cooler weather, I use a thicker sock and that the boots feel good. At times, because my bike generates a lot of heat that I leave the vents open unless its wet out. The vents do not pull a large amount of air into the boot, but they do allow for a nice light flow of air in. These boots IMHO, were worth the wait and price. Dec 6, 2014
Reply to James Good answer? Yes (0) No (0)
Ryan W: they work awesome in all temps. Dec 2, 2014
Reply to Ryan Good answer? Yes (0) No (0)
Thomas K asked: I am new to these kinds of boots and leathers. I just received today, both my SIDI ST boots and an a* Motegi suit. Are these things compatible? I can't put the leathers on the outside of the SIDI boot, as they won't zip up (and it doesn't seem to me that is the way they should go anyway). But I also cannot put the leathers inside the boot, as the boot will not zip up if I do - not even close. I can only assume that the a* boots are shorter and designed differently than the SIDO boots? Anyone with experience on this? Also, the shin guard in the suit extends into the boots as they are so tall. I am at a loss as I can find no one else commenting on such a problem in the reviews here and elsewhere. Any advice would be appreciated. I am getting ready to return the boots but would like to be sure it's not just me. Feb 4, 2015
Answer this · Send to friends Good question? Yes (0) No (0)
Thomas K: well, in the end I think I just decided it's new leather and I just need to work it for a bit. But, I am left curious as to what the advantage is of the boot's interior mesh when I have my lower leg wrapped in thick leather. Anyway - insights are appreciated, but I believe I'll stick with the boots and look forward to the day when it gets a little easier. I don't have thick calves, and the boots are the correct size for my feet. So, I assume it will all work out. Feb 4, 2015
Reply to Thomas Good answer? Yes (0) No (0)
Nathan W: Those leathers are intended to go inside of the boot, not over. If sized properly, they will zip and cuff just above your ankle. Then with your boots, adjust them accordingly to be snug around your calf but not tight. Enjoy the STs, I've races with them for 3 years now and like them a lot. Feb 5, 2015
Reply to Nathan Good answer? Yes (0) No (0)
A s: I have the same boot but use it with a Dainese suit. I wear the boots outside the leathers with no problems. I'm unfamiliar with the Mortegi suit but this may be the issue. Personally I would think about keeping the boots and swapping out the suit, as I really like the features of the boot. Feb 6, 2015
Reply to A Good answer? Yes (0) No (0)
Thomas K: Thanks! I eventually was able to seal the boot up over the suit legs - it just took a lot of effort. As you know, the boots have this stretchable inner 'bootie' and I think I just need to pre-stretch it more before I zip them up. But, as the suit is new, the boots are new, and I am new to all of this, I was having difficulty performing simple operations while hunched over in this suit. I just need to get one of my minions to help me :-) I really like the suit and the boots, so am going to keep both. Those shoes look and feel like armor, definitely plan to keep them. Thanks again for your response. Feb 6, 2015
Brian K asked: Just got my hands on a new pair of Sidi ST Boots. Phenomenal product but the left side air vent is rubbing horribly on the side of my foot. Backed out the screws that hold the ankle brace on which helped a bit but am not sure it's a cure. Is this area likely to soften during normal break in? Lot of money to spend on this boot if it doesn't . Also, how do you shorten the strap on the cam buckle? Read something somewhere about popping the strap out in order to make the adjustment but would like some further direction before I risk breaking it. Thanks. RevZilla rocks!!! Feb 19, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Khalid Q: Unless your left foot is wider than your right, you may have a faulty boot.
Just took a look at mine and the air vent does not come anywhere near my foot, my boots are extremely comfortable, can wear them all day at the track.
I would try on another pair just to be sure.
The strap needs to be popped out of the grey plastic piece that says sidi on it and then you'll see that it moves freely for you to adjust. Just pull it softly outwards from the 2 small tabs holding it in place.
Feb 21, 2014
Reply to Khalid Good answer? Yes (0) No (0)
Jordan T: These boots break in beautifully I've had them 2 seasons now and experienced similar issue at first, before long they were broke in nicely, long rides short rides no discomfort. They are far and away the best protection and comfort combo you can find, hang in there Brian like fine wine they get better with age!! Condition the leather helps them as well, mine look brand new besides minor scuffing on the plastic plating. You made a great choice Feb 21, 2014
Reply to Jordan Good answer? Yes (0) No (0)
Ahmad S: Yes the boot does break in easily and comfortably faster than the issue with the left foot would bother you. You just need a few days on the bike and the boots would feel as comfortable as possible. Actually this boot was my favorite ever.
As for the strap adjustor, you need to pop it upwards from the square metal frame, pull out or in, then push the straps back in place.
Mar 23, 2014
Reply to Ahmad Good answer? Yes (0) No (0)
Victor S asked: How tall are the boots from the heel of the footbed to the top? Dec 1, 2014
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Clifford W: I believe my are size 43 11 about 3/4" from footbed heel to top of back of boot! Dec 4, 2014
Reply to Clifford Good answer? Yes (0) No (0)
Ryan W: about 3/5 up your shin Dec 2, 2014
Reply to Ryan Good answer? Yes (0) No (0)
Victor S: Could I get the measurement in inches? I have really long legs so I doubt they'd cover that much. Dec 2, 2014
William C asked: Are the Sidi Vortice toe sliders compatible with the Sidi ST? Apr 7, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Gavin A: Hi . Don't know as the Sidi Vortices have holes for ventilation in the boots + toe sliders. Apr 30, 2014
Reply to Gavin Good answer? Yes (0) No (0)
Ahmad S: No, there is a slight difference. I have both and the toe sliders do not match properly. May 25, 2014
Reply to Ahmad Good answer? Yes (0) No (0)
Tesfalem G asked: How do I find the replacement parts? Nov 24, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
adam h: I have not yet had to replace anything. I did however take the rear heal protector off as it rubs the reaset bracket on the brake side and i cant get used to it. Other than that, Amazing boots Nov 25, 2013
Reply to adam Good answer? Yes (0) No (0)
A shopper asked: According to their size charts, SIDI seems to use European sizing and run 1/2 size bigger... If I'm a size 8 USA, will the size 42's fit me or be too big? Aug 29, 2011
Answer this · Send to friends Good question? Yes (0) No (0)
Taliesin1077: I have found when it comes to Sidi sizes, it's best to order a little larger than you might think. For example, on U.S. sizes, I am normally a size 12, and my shoes are a little loose (I like them that way). When I ordered the Sidi Way Rains, I ordered a 46, thinking they would be nice and snug. They were too small. I had to return them (easy) and order a new pair. The 47's are listed as a 12.5, and they fit perfectly.

Based on that experience, I suspect the 42's will fit you just fine. If they don't, Revzilla will allow you to return them and get a different pair. I don't think you'll have to go that route, but it's nice to know you have it available.
Aug 29, 2011
Reply to Taliesin1077 Good answer? Yes (0) No (0)

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 / 7/40 751208 2000000076379 Out of Stock
Black / 7.5/41 751209 2000000076386 In Stock: Ships within 24 hours
Black / 8.5/42 751210 2000000075150 In Stock: Ships within 24 hours
Black / 9.5/43 751211 2000000076393 In Stock: Ships within 24 hours
Black / 10/44 751212 2000000076409 In Stock: Ships within 24 hours
Black / 11/45 751213 2000000076416 In Stock: Ships within 24 hours
Black / 11.5/46 751214 2000000076423 In Stock: Ships within 24 hours
Black / 12.5/47 751215 2000000076430 In Stock: Ships within 24 hours
Black / 13/48 751216 2000000076447 In Stock: Ships within 24 hours
Black / 14/49 751217 2000000076454 In Stock: Ships within 24 hours
Black / 14.5/50 751218 2000000076461 In Stock: Ships within 24 hours
Black/White / 8.5/42 751231 2000000075143 In Stock: Ships within 24 hours
Black/White / 9.5/43 751232 2000000076133 In Stock: Ships within 24 hours
Black/White / 10/44 751233 2000000076140 In Stock: Ships within 24 hours
Black/White / 11/45 751234 2000000076157 In Stock: Ships within 24 hours
Black/White / 11.5/46 751235 2000000076164 In Stock: Ships within 24 hours
Black/White / 12.5/47 751236 2000000076171 Available: Requires 2-4 business days processing time prior to shipment.
Black/Red / 8.5/42 751225 2000000075167 In Stock: Ships within 24 hours
Black/Red / 9.5/43 751226 2000000076522 Available: Requires 2-4 business days processing time prior to shipment.
Black/Red / 10/44 751227 2000000076539 In Stock: Ships within 24 hours
Black/Red / 11/45 751228 2000000076546 In Stock: Ships within 24 hours
Black/Red / 11.5/46 751229 2000000076553 Available: Requires 2-4 business days processing time prior to shipment.
Black/Red / 12.5/47 751230 2000000076560 Available: Requires 2-4 business days processing time prior to shipment.
Black/Florescent Yellow / 8.5/42 882607 SIS-STS-BKFY-42 In Stock: Ships within 24 hours
Black/Florescent Yellow / 9.5/43 882608 SIS-STS-BKFY-43 In Stock: Ships within 24 hours
Black/Florescent Yellow / 10/44 882609 SIS-STS-BKFY-44 In Stock: Ships within 24 hours
Black/Florescent Yellow / 11/45 882610 SIS-STS-BKFY-45 In Stock: Ships within 24 hours
Black/Florescent Yellow / 11.5/46 882611 SIS-STS-BKFY-46 In Stock: Ships within 24 hours
Black/Florescent Yellow / 12.5/47 882612 SIS-STS-BKFY-47 In Stock: Ships within 24 hours