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SidiDefender Cycling Shoe - Men's

Sale 25% OffCurrent price:$187.49 Original price:$249.99

Item # SID009O

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  • Black, 41.0 ($187.49)
  • Black, 42.0 ($187.49)
  • Black, 43.0 ($187.49)
  • Black, 44.0 ($187.49)
  • Black, 46.0 ($187.49)
  • Black, 47.0 ($187.49)
  • Black, 48.0 ($187.49)
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Item # SID009O

Defender Cycling Shoe

Lightweight and super stiff may have a cult following when it comes to cycling shoes, but those of us spending our bike rides chasing adventure, hiking-a-bike, and charging into the beyond are looking for a bit more from our shoes. Enter the Sidi Defender Cycling Shoe for Men — supple, stiff, and supportive, and just the right amount of overbuilt with all-mountain ready lugs, and durable uppers that hold your foot in place like a firm handshake, and reinforced heel and toe that gives you support from your local trail network well into the wiliest of backcountry adventures and bikepacking excursions.

The Sidi Defender cycling shoes are constructed with Sidi's Politex Sude Effect uppers, paneled for support and backed with mesh that lets your feet breathe. Sidi's Politex material is unique in that it combines several different materials in thin layers to compound their strengths, and then coupled with compacted PVC to ensure rugged durability for long, hard miles bushwhacking through trail debris. Politex is designed to stand up to laceration, stretching, and ripping, with resistance to fading to keep your kicks looking as fresh as the day you got them, three years in. The panels of Politex hold your flippers snug, and are paired with both hook-and-loop straps and a Tecno-3 buckle system that cinches down to keep your foot comfortable for the long haul. The Tecno-3 system involves two ratcheting dials, Sidi's proprietary, non-stretch wire, and a customizable fit at the instep and forefoot. Since adventure-minded shoes may spend a little more time on-foot and off bike, the Defenders feature a higher ankle design, giving cushion to stray cranks, and support to ankles for the moments when you have to throw your bike over shoulder and scramble up sketchy rock faces.

Over time, Sidi has become synonymous with supportive soles, and the Defender Cycling shoe is no different. These kicks use Sidi's Outdoor Sole, which is designed with rubber that can adapt to variable trail conditions, offering serious grip through muddy and wet trails, and rocky faces alike. The tread pattern is strategic and deliberate, both aiming to target exceptional mud shedding skills, and comfort on foot. This is done by utilizing directional lugs that are designed to propel you forward in the front, and work as virtual brakes in the back. Ample spacing in between the beefy lugs keep the mud shedding, so your footing can stay sure, and clipping back in after a steep hike isn't a burden.

  • Serious shoes for all-mountain adventures
  • Beefy lugs keep you secure on foot
  • Stiff sole transfers maximum power to pedals
  • Politex uppers are extra-durable and tough
  • Tecno-3 closure cinches down for perfect fit
  • High ankle coverage for hiking a bike
  • Reinforced heel cap keeps your foot locked in place
  • 2-bolt mountain bike cleat compatible

Tech Specs
Upper MaterialPolitex Suede Effect, mesh
ClosureTecno-3, hook-and-loop
SoleSidi Outdoor Sole
Cleat Compatibility2-bolt
Manufacturer Warranty1 year


Cycling Footwear
36 3.3 4.8 2.8 22
36.5 3.7 5.2 3.2 22.4
37 4.1 5.6 3.6 22.7
37.5 4.5 6 4 23
38 4.9 6.4 4.4 23.3
38.5 5.3 6.8 4.8 23.7
39 5.7 7.2 5.2 24
39.5 6.1 7.6 5.6 24.4
40 6.4 7.9 5.9 24.7
40.5 6.8 8.3


41 7.2 8.7 6.7 25.3
41.5 7.6 9.1 7.1 25.7
42 8 9.5 7.5 26
42.5 8.4 9.9 7.9 26.4
43 8.8 10.3 8.3 26.7
43.5 9.2 10.7 8.7 27
44 9.6   9.1 27.3
44.5 10   9.5 27.7
45 10.4   9.9 28
45.5 10.8   10.3 28.4
46 11.2   10.7 28.7
46.5 11.6   11.1 29
47 11.9   11.4 29.3
47.5 12.3   11.8 29.7
48 12.7   12.2 30
48.5 13.1   12.6 30.4
49 13.5   13 30.7
Sidi recommends following the procedure below to ensure that you choose the right size.
Measure your foot by following these steps:
1. Put a sheet of paper on the floow with the short side against the wall.
2. Put the sole of your bare foot on it with the heel pressing against the wall.
3. Mark the point in front of the tip of your longest toe on the sheet of paper.
4. Measure the distance between the margin of the sheet of paper where you placed your heel and the point where you made the mark. Always round up the measurement to the nearest mm.
You may find that your right and left foot are different lengths. Always measure both of them and use the longest measurement as your reference.
If you are undecided between two sizes after consulting the table, Sidi recommends that you opt for the larger size.

What do you think about this product?


>Rating: 4

First thoughts on fit

I've used it once or twice and have initial impressions
True to size
Size Bought
5` 10"
225 lbs

Love these shoes! Sidi quality and style. I went with orange because, well, why not? So about fit. I bought a 45 and wear size 10.5 in everything. I am not a 10 and not an 11 in anything, ever. I find these to be exactly true to size. I have barely one thumbs worth of space in tow box and have no desire to size down to a 10 (44.5). I can’t stand my toes touching the toe cap, especially if I am banging them off rocks. My feet are not narrow! They are standard width in every way with a medium arch. Nothing too far in either direction. Fit is almost perfect in every way. But....the heels do lift when I walk. It’s not terrible and it’s an issue I’ve had with just about every cycling shoe I’ve ever owned. So take that for what’s its worth. That’s the only reason I gave these an honest four stars.

>Rating: 3

Sizes Run Small

I returned this product before using it
Runs small
Size Bought
6` 4"
215 lbs

At least for size 48 shoes these were about half a size too small. Too bad, because they seem like a well-built shoe and look good as well.


does the SIDI defender come in multiple widths like other Sidis??