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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.
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SIDI ST Boots 4.9 5 32 32
Can´t beat this boots! If your looking for a pair of boots that not only make everyone ask you "where did you get them", but also make you feel extremely secure when riding, look no further... they're heavy, but after breaking them in they feel really comfortable and you'll forget you have them on. March 25, 2014
More mobility than my other race boot. These boots are easy on easy off. They have more mobility than my other race boot right out of the box and better protection. If you have a high arch you may want to add some arch supports because there's not much there for walking around all day, but then again these boots are made for Riding not a trip to the mall with your girl friend. Air flow is fair with the vents open and the buckle's are awesome. January 11, 2014
My first pair of boots The fit is superb. I usually wear a 10 in normal foot wear. Although shoes or boots that have a slightly pointed toe area, will be tight in the toe. The Sidi ST fit great in this area. I have no comfort issues. December 9, 2013
Good boots, love it. This is my first pair of motorcycle boots, so I can't compare it to some other products. In overall I am pretty happy with them, just a few things bother me. 1. Boots squeak when you walk pretty loudly. 2. Very bad grip on wet road. 3. A little bit wide, but this is probably due to my feet, long and narrow. November 28, 2013
Great safety features, Unfortunately I have only had a chance to wear them a couple of times, but they feel reasonably comfortable for a performance boot. Maybe a little on the narrow side for me, but then my foot is rather wide. Extremely easy on and off. November 12, 2013
Nice item. As described in video review and webpage. SIDI make an excelent mid-high range boots. ST are just above vortice. October 23, 2013
Great boots. These boots are badass style wise and protection wise. Strangely the left foot needed breaking in. I used the soap on the sock trick where I was receiving pressure on my foot while walking. In three days the boot felt perfectly comfortable. There have been no issues walking around in them. As for riding with them the boots are flawless. I have complete flexibility sliding my feet up and down the pegs without my safety being compromised. Sidi st boots are well constructed, well designed especially at my caves where I can tighten the boot to size. They are bulky. You will most likely wear your pants in boots unless you wear baggy pants. Ventilation...well you have these two cool looking holes that you can open and shut but I have yet to discover their purpose. In either position I haven't felt a difference. I don't know if these boots are waterproof but I rode in a rain storm yesterday and my feet were bonds dry. Sidi st are my first boots and I love them. September 2, 2013
Best bang for buck protection I could find I have 16" calves and I can still cinch the straps up on these boots--albeit I can't tuck anything into them which is ok as I wear them with my RHOK jeans over the top. I'm an 8 1/2 and the size 43 in the boot fits fine and is wide enough in the foot bed but only with thin socks though. Solid toe box with excellent lateral compression resistance, firm ankle support, comfortable and easy to shift with. Nice and light too. The only thing I thought might be improved was if the shin protection extended a little lower but in fairness I couldn't find a single boot that offered this. August 21, 2013
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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: 6 Questions, 20 Answers
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RevZilla Store asked: Why did you choose this?
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 (0)
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
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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
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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
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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
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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
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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
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adam h: Sidi for sure, these boots are simply awsome. Aug 20, 2013
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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
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Tesfalem G asked: How do I find the replacement parts? Nov 24, 2013
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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
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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
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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
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William C asked: Are the Sidi Vortice toe sliders compatible with the Sidi ST? Apr 7, 2014
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Mens and Womens Footwear

Footwear Conversion
EURO US MensUS Womens

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 SKU ID Manufacturer Product # Availability
Black / 7/40 751208 SIS-STS-BKBK-40 In Stock: Ships within 24 hours
Black / 7.5/41 751209 SIS-STS-BKBK-41 In Stock: Ships within 24 hours
Black / 8.5/42 751210 SIS-STS-BKBK-42 In Stock: Ships within 24 hours
Black / 9.5/43 751211 SIS-STS-BKBK-43 In Stock: Ships within 24 hours
Black / 10/44 751212 SIS-STS-BKBK-44 In Stock: Ships within 24 hours
Black / 11/45 751213 SIS-STS-BKBK-45 In Stock: Ships within 24 hours
Black / 11.5/46 751214 SIS-STS-BKBK-46 In Stock: Ships within 24 hours
Black / 12.5/47 751215 SIS-STS-BKBK-47 In Stock: Ships within 24 hours
Black / 13/48 751216 SIS-STS-BKBK-48 Available: Requires 2-4 business days processing time prior to shipment.
Black/White / 8.5/42 751231 SIS-STS-BKWH-42 Available: Requires 2-4 business days processing time prior to shipment.
Black/White / 9.5/43 751232 SIS-STS-BKWH-43 In Stock: Ships within 24 hours
Black/White / 10/44 751233 SIS-STS-BKWH-44 In Stock: Ships within 24 hours
Black/White / 11/45 751234 SIS-STS-BKWH-45 In Stock: Ships within 24 hours
Black/White / 11.5/46 751235 SIS-STS-BKWH-46 In Stock: Ships within 24 hours
Black/White / 12.5/47 751236 SIS-STS-BKWH-47 In Stock: Ships within 24 hours
Black/Red / 8.5/42 751225 SIS-STS-BKRD-42 Available: Requires 2-4 business days processing time prior to shipment.
Black/Red / 9.5/43 751226 SIS-STS-BKRD-43 Available: Requires 2-4 business days processing time prior to shipment.
Black/Red / 10/44 751227 SIS-STS-BKRD-44 In Stock: Ships within 24 hours
Black/Red / 11/45 751228 SIS-STS-BKRD-45 Out of Stock
Black/Red / 11.5/46 751229 SIS-STS-BKRD-46 Out of Stock
Black/Red / 12.5/47 751230 SIS-STS-BKRD-47 Available: Requires 2-4 business days processing time prior to shipment.
Black/Florescent Yellow / 8.5/42 882607 SIS-STS-BKFY-42 Out of Stock
Black/Florescent Yellow / 9.5/43 882608 SIS-STS-BKFY-43 Out of Stock
Black/Florescent Yellow / 10/44 882609 SIS-STS-BKFY-44 Available: Requires 2-4 business days processing time prior to shipment.
Black/Florescent Yellow / 11/45 882610 SIS-STS-BKFY-45 Out of Stock
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