Mon-Sat 8am-5pm PT
Sign Up
Serving cyclists
since 2002
Click Here for Larger Image

Sidi Defender MTB Shoe

Mfg PartNum:
Save 5% more when you purchase 2 or more Closeout items
Out of Stock
Ships Free!
Please Confirm Size

The Sidi Defender MTB Shoes are designed for aggressive mountain riding, providing durability, usability, and stiffness. Featuring their new Outdoor Race sole with an optimized rubber compound with increased stiffness for more aggressive terrain and riding. The Politex upper uses strategic padding and rubber inserts for the protection that's needed for hard riding on the mountain. A Tecno 3 Precision ratchet closure system makes micro-adjustments of just 1mm for a precise, easy fit.

The Sidi Defender MTB Shoe is compatible with 2-bolt SPD-style mountain pedals and cleats.


  • Politex upper is specifically designed for lightweight, comfortable durability.
  • Upper design adds in added protection for the inner ankle without adding bulk.
  • Sidi's Outdoor sole offers the perfect blend of stiffness and walkability.
  • Grippy rubber outsole features optimally-placed studs for the absolute in walkability.
  • Sidi Heel Cup provides pedaling stability and added security.
  • Pull-tab on the heels allow for fast transitions.
  • 4-holes plate for easy fitting of 2-bolt mountain cleats.
  • Tecno 3 closure system provides fast, easy adjustments of as little as 1mm.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. Cleats may have been mounted leaving minor marks on the soles. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Discount Codes are not applicable to Closeouts.

This product is NOT Eligible for VIP Points.

Black/Yellow - 42

Mfg PartNum: SMS-DFN-BKYL-42 

Black/Yellow - 43

Mfg PartNum: SMS-DFN-BKYL-43 

Black/Yellow - 44

Mfg PartNum: SMS-DFN-BKYL-44 

Black/Yellow - 45

Mfg PartNum: SMS-DFN-BKYL-45 

Black/Yellow - 46

Mfg PartNum: SMS-DFN-BKYL-46 

Black/Yellow - 47

Mfg PartNum: SMS-DFN-BKYL-47 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 7/4/2019
by John
Cycling Enthusiast
Value Rating
Overall Rating
Falls short of being a great shoe

I'm a Sidi fanboy from way back. I wanted a pair of shoes that were walkable for use bike touring. Sidi recently released this shoe and the SD15. Both of them miss and both of them could be awesome.

The SD15 has a ridiculously flexible sole that would benefit from the stiffer sole (actually, the nylon shank) this shoe has. This shoe has the inner protection from the cranks which (a) look silly, and (b) are uncomfortable. Either fix the SD15 shoes sole by adding the sole here or get rid of the higher inner ankle piece.

Normally Sidi knocks it out of the park and their boa-style system is really good. The shoe fits all, walks well and looks stupid. I don't know what else to say. I'd call both of these shoes a miss.

Was this review useful to you? Yes/No
Thank you for your feedback.
Reviewed 5/27/2019
by bikeslutintahoe
Cycling Enthusiast
Lake Tahoe CA
Value Rating
Overall Rating
Another quality Sidi product

Looking for a durable, comfortable mountain bike shoe that you can hike- a- bike in. Found it! Sidi makes good shoes

Was this review useful to you? Yes/No
Thank you for your feedback.
Reviewed 1/31/2019
by Anonymous
Overall Rating
Good fit and good service

I bought these shoes for the inner ankle protection. I am very satisfied. They fit well and the closures work well

Was this review useful to you? Yes/No
Thank you for your feedback.

Articles will open in new tab.

How to choose the best cycling shoes for your riding style.

We are committed to delivering outstanding value and service to our customers, every day.
Try us today to see why so many of our customers come back again and again.

*Orders received before 3:00PM Pacific time are shipped the same day (Mon-Sat). Orders over $50 are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 72