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SIDI ST Air Boots
  • SIDI ST Air Boots - Black
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots
  • SIDI ST Air Boots

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SIDI ST Air Boots Videos

SIDI ST Air Boots

The SIDI ST Boot features a hinged external support structure for helping to prevent lateral ankle movement while allowing for smooth fore and aft transitions on the bike. A set it and forget it cam lock closure system on the calf enables easy entry and accommodates a wide variety of calf diameters. All bolt-on components are replaceable. 


  • Patented and trademarked Sidi Vertebra System protects the achilles tendon
  • Thermoplastic resin ankle protection
  • Replaceable to sliders
  • Composite inner sole
  • Removable arch support
  • Nylon shin deflector plate
  • Perforated 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

Sidi Footwear Sizing

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.

How To Measure

FT Feet What size shoe do you wear?
Product Style RevZilla Item # Manufacturer Product # Availability
Black / 7.5/41 751191 2000000076775 In Stock: Ships within 24 hours
Black / 8.5/42 751192 2000000075181 In Stock: Ships within 24 hours
Black / 9.5/43 751193 2000000076782 In Stock: Ships within 24 hours
Black / 10/44 751194 2000000076799 In Stock: Ships within 24 hours
Black / 11/45 751195 2000000076805 In Stock: Ships within 24 hours
Black / 11.5/46 751196 2000000076812 Only 3 Left: Ships within 24 hours
Black / 12.5/47 751197 2000000076829 In Stock: Ships within 24 hours
Black / 13/48 751198 2000000076836 In Stock: Ships within 24 hours


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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.

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SIDI ST Air Boots 4.5 5 31 31
Perfect boot other than narrow toe box I upgraded to these boots for more protection since I only ride tracks now. They do indeed have excellent protection and I would call them "perfect" except that the toe box area is a little too narrow and doesn't seem to be breaking in much after two track weekends. Right where the toe slider starts really presses against the little toe and causes irritation. On the plus side, they look great, are very easy to put on/off, and offer great protection. I was concerned that all the bracing and support would make riding hard but they actually felt better on the bike than my old worn-in boots right from the beginning. I love how easy the cam locks are to operate and that you can ratchet in your desired calf circumference and leave that setting alone. I wear a size 12-13 shoe and got these boots in a size 47 which seems like the right size for me. Overall I am happy with the purchase. The narrow toe area is the only downside and if that ever wears in I'll call these a perfect boot. August 2, 2016
Great Protection and comfort Break in only takes a few hours and they are very comfortable while riding. Not the best for walking around, but protection is great. So far one track day in them and they feel great. They are built to last. February 2, 2016
Got the boot` Finally pulled the trigger on these. Great quality. Very lite. They feel like they weigh less than my tennis shoes! Nice sturdy sole. Couldn't be easier to get into. I wear a size 8.5 to 9 shoe and bought the 9.5 size. Fit perfectly and are easily wide enough for my EE size foot. Very happy with the purchase. Revzilla service was outstanding as always. December 3, 2015
Top quality Italian design and features Definitely worth the extra cash for these boots. The zipper, Velcro and latching systems work together for a perfectly adjustable fit. I'm not planning on crashing in them, but they're some of the best protection, if needed. September 23, 2015
Exactly What I Wanted Sexy, easy/quick to put on, and protective to my knowledge. September 8, 2015
Great all around boot! I have had the boots now for about two weeks. They are awesome all around. Great for the street and the track. A little stiff when you first get them but once they are broken in, they are hands down the best boot I have owned. July 6, 2015
Great track day boot If you want all the protection you need for normal track days without spending as much as the pros, this is the boot to get. Great style. Easy to take on and off. Not too difficult to walk in. doesn't get too hot. They did squeak a little after a crash on the track on a rainy day, but that might be my own fault... Can't hear it over the exhaust anyway July 6, 2015
Great Fitting Boot I owned a pair of SIDIs several years ago that were great. Then I had to go and crash test them on a high speed high side. The grinding from the long slide left those SIDIs unusable. However my feet and ankles where left in good shape. The past two seasons I have been using my backup boots from a good company ($400 boots), but just hate them because I have little feel of the pegs. So, the wife bought me the SIDI STs for my birthday. I have not put any track time on them but they fit great and feel glorious. I am sure I will cut 5-6 seconds off my lap times with these. Yeah I like SIDI boots, others don't. Find what you like and ride. I recommend SIDIs and Revzilla! March 10, 2015
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