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SIDI Astro Boots
  • SIDI Astro Boots - Black

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SIDI Astro Boots Videos

SIDI Astro Boots

SIDI Astro Boots feature integrated protection with styling that is biased towards the non-motorcycle boot end of the spectrum. 


  • Internal thermoplastic resin ankle ball protection cups.
  • Nylon inner sole with removable arch support pad.
  • 1.7mm thick Technomicro is used as a base material.
  • Lined with Teflon mesh on the ankle, Cambrelle on the toe and soft mesh on the tongue and gaiter area.
  • Partially vented upper.
  • Double stitched in all high stress areas.
  • Sidi’s own Tecno 3 wire entry and closure system.
  • VELCRO® brand closures strap above the instep area.
  • Toe shift pad.
  • Internal ankle padding.
  • Durable high grip sole.
  • Perforated details to improve ventilation.
  • Internal shock absorbing heel cup.
  • Reflective points above the heel.

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 864537 SIT-NIT-BKBK-41 Out of Stock
Black / 8.5/42 864538 SIT-NIT-BKBK-42 Only 2 Left: Ships within 24 hours
Black / 9.5/43 864539 SIT-NIT-BKBK-43 Only 2 Left: Ships within 24 hours
Black / 10/44 864540 SIT-NIT-BKBK-44 Out of Stock
Black / 11/45 864541 SIT-NIT-BKBK-45 Only 1 Left: Ships within 24 hours
Black / 11.5/46 864542 SIT-NIT-BKBK-46 In Stock: Ships within 24 hours
Black / 12.5/47 864543 SIT-NIT-BKBK-47 Out of Stock
Black / 13/48 864544 SIT-NIT-BKBK-48 Out of Stock


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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 Astro Boots 4.7 5 15 15
Absolutely no disappointments. I ride everyday rain or shine, I also work in these boots. I usually go through a set of boots in about 30 days. My Sidi Astro's have been an absolute pleasure. They are still very good looking after 3 months and 8500 miles of all weather riding. Great work to the people of Sidi. You never disappoint. One satisfied costumer! June 27, 2016
Took a chance and it paid off. I state that the fit is slightly small only because I wear a size 9. I have cycling shoes from Sidi and I've always worn 42.5. That doesn't seem to be offered in this shoe, however, the 43 (9.5) fits me perfectly. I also have a slightly narrow foot and that's why I said it fits a bit narrow. Again, it fit's me perfectly. These won't win any fashion awards, but they do look good and serve their purpose. The difference in feel on the bike is worth every penny over riding with casual boots. Brake pedal and shifter feel is so controlled with these boots, and grip is great when putting your feet down at a stop. I'd buy these all over again. Oh, and the ratchet mechanism "laces" are super quick, easy, and secure. March 19, 2016
Good investment. Great quality. Ordered normal shoe size and fit perfectly. Great looking and very comfortable. Like the way you can tighten on foot for that perfect fit. Great walking shoe. Everything as advertised with great quality. Worth every penny. Pleased with my purchase from Revzilla. December 1, 2015
good compromise boot for summer I have the Sidi gortex Adv boots... but I was looking for something to commute with in hot weather. I wanted light weight, something I could walk in... maybe some breath-ability. This boot/shoe does the job. I like the tecno 3 laces... pretty cool. Fit is good. I take a US 11 and a 45 fits fine. Comfort wise there is very little padding in these. You can walk in them but I wouldn't want to hike miles. They tend to rub my ankles a bit up high. On the bike they have great feel... easy to shift/brake. Very nice. Overall this is a good compromise between protection and comfort. I think if a had a fall in these they would hold up well and while not a pair of sneakers... you can walk around (no squeaking) and not look out of place. I normally rock these with a pair of draggin jeans and a mesh jacket... July 29, 2015
Sidi is and always delivers on its products I am a serious bicycle rider and own several pairs of cycling shoes, they are beyond the best and have tremendous longevity. After returning to motorcycle riding I decided to try these Sidi Astro Boots for the warmer Florida climate. What a quality product. Great design and great looks. you will not be disappointed. Additionally I would like to write something about RevZilla as below: This company is a cut above all the other motorcycle related companies I have dealt with. Their informative videos are invaluable for the products they carry. The companies customer service and expedient shipping is the best I have experienced and I do a lot of online shopping. Additionally the way the products are packaged clearly says to the customer, We care. The Sidi shoes I recently received were packaged with tender loving care. This company RevZilla has EARNED my business. Thanks for caring and I will tell all my riding friends the same. January 10, 2015
not pretty but very good boot if you can handle the saddle shoe look, these are a great boot. I usually wear a size 12 shoe, and size 46 in these boots is the right fit (tried a 47, it was quite loose). The lacing system is great at getting everything perfectly snug. Shoes are very light feeling, and fit is very comfortable on the bike. Haven't needed it yet, but protection seems good around the foot and ankle. January 14, 2015
Nice boot for the cash I haven't worn these on the bike yet because it's 4 degrees in Kansas City. But, I have worn them around the house. I was looking for a type of shoe/boot that I could wear comfortably on those all day rides/weekends instead of a full on race type boot. I want some flexibility while wearing the boot off the bike and I think these will be fine. The footpad does seem to be narrow like stated so I can't comment on if that will affect its performance. I will say they are a nice looking boot, even in the white trim. The hardware is much like my Sidi Race boots I use on the track. I’m a fan. Lots of adjustability for comfort and Sidi is quality stuff. Like I said, I didn’t want a full on boot or race boot as I do several overnight rides and trips with my buddies and I wanted something that offered protection but also offered comfort while walking around off the bike. I think these will be perfect. I’m a Sidi fan. They make a quality product and these seem very comfortable out of the box. For the price, you just can’t go wrong with them. January 7, 2015
Fits great, love the Tecno 3 wire entry and closure system. Wore for a couple months, haven't had any fitting/break in issues. I wear a 9 and ordered Euro 43. The only problem I had was getting caught in some rain and having wet feet. These boots are not anyway waterproof. Boots keep your feet cool on warm days, you may want to wear warmer socks for the cooler days. October 31, 2014
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