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Sidi Mens Genius 10 Mega
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Sidi Men's Genius 10 Mega

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Mfg PartNum:
rating(7 customer reviews)
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pr. $227.49
MSRP: $324.99
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Excellent Rigidity With A Wider Width

Take a ride with performance kicked into high gear. The Sidi Men's Genius 10 Mega shoe is built for road cycling, exhibiting a lightweight body that is tough and resilient for all the trails ahead. Make the smart decision and treat yourself to something genius.

The Soft Instep Closure System is a wide, anatomically curved strap combined with a soft, thermo-formed EVA pad that distributes pressure evenly over the instep area. It is adjustable from both sides, which perfectly centers the EVA pad over a high or low instep. This system eliminates the need for the High Instep Extender while being completely replaceable for endless use.

The Techno-3 system dials the fit along the length of the shoe, adapting the upper shape to match your foot. Sidi Wire material is non-binding for intuitive and effortless on-the-fly adjustments. The heel cup features a new design with a lightweight, reinforced to avoid deformations after prolonged efforts and pressures.


  • Carbon composite 20 sole has injected carbon fiber for durability
  • Replaceable polyurethane heel has graduated millimetric scale
  • Integrated heel cup is anatomically shaped
  • Techno-3 system dials in the fit for added comfort
  • Sidi Wire material is non-binding for effortless adjustments
  • Soft instep closure system includes a thermo-formed EVA pad
  • All parts are serviceable and replaceable

Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

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.

Size Chart

This size chart provides our best estimate for which European shoe size to choose based on your US shoe size. This will not necessarily match the US size shown on the product, but it is the best guidance we can provide for this particular brand.

If we've noticed that any particular model deviates from the standardized chart, we will list this information in the product description.

Please contact us with any questions.



Width: Wide 


Cleat Compatibility: 3 Hole (Road) 

Black/Grey - 42

Mfg PartNum: SRS-GXM-BKGY-420 

Black/Grey - 42.5

Mfg PartNum: SRS-GXM-BKGY-425 

Black/Grey - 43

Mfg PartNum: SRS-GXM-BKGY-430 

Black/Grey - 43.5

Mfg PartNum: SRS-GXM-BKGY-435 

Black/Grey - 44

Mfg PartNum: SRS-GXM-BKGY-440 

Black/Grey - 44.5

Mfg PartNum: SRS-GXM-BKGY-445 

Black/Grey - 45

Mfg PartNum: SRS-GXM-BKGY-450 

Black/Grey - 45.5

Mfg PartNum: SRS-GXM-BKGY-455 

Black/Grey - 46

Mfg PartNum: SRS-GXM-BKGY-460 

Black/Grey - 46.5

Mfg PartNum: SRS-GXM-BKGY-465 

Black/Grey - 47

Mfg PartNum: SRS-GXM-BKGY-470 

Black/Grey - 48

Mfg PartNum: SRS-GXM-BKGY-480 

Black/Grey - 49

Mfg PartNum: SRS-GXM-BKGY-490 

Black/Grey - 50

Mfg PartNum: SRS-GXM-BKGY-500 


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SIDI Men's Genius 10 Mega
by Anonymous
Cycling Enthusiast
Tucson, AZ

Good cycling shoe. Rigid sole was immediately noticeable in performance. I made a new PR on a 4 mile climb when I wasn't pushing hard. Of course, a tailwind helped a bit too. But overall, noticeable difference with the new shoe. Only issue is it is rubbing a bit on the left foot metatarsal but I assume that will calm down with breakin so I alternate wearing the old and new shoe assuming the breakin will occur soon.

Reviewed 1/9/2023
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great fitting wide shoe
by Anonymous

shoe fits great my foot has gotten wider due to a bunion and I couldn't even pull enough Velcro on my old ones the ratchet system really helps

Reviewed 4/10/2023
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The Mega Gets Better
by frizbking
Cycling Enthusiast
Central Oregon
1 of 1 customers found this review helpful.

I have been wearing Sidi Mega sized shoes, 48, ( one Competitive site lists this as a 12.7 US ) for over a decade. Most recently I have been using Sidi Ergo 5 Mega and I was having some comfort issues. I use a professional bike fitter who also uses a customizable sole to optimize foot position. That said, I saw the sale and I ordered the Sidi Genius 10 Mega. When the shoes arrived they were different than the picture with upgraded black toes and tongue. I'm a fashionista so I like the hipster look. Think 70's cars with black vinyl roofing. When I inserted my foot I noticed the boot was very roomy. The heel cup was secure. As I cinched down the Techno wire, I noticed that the comfort on top of the foot was better for me than the Ergo model. The Genius in comparison distributes up along the length of the foot instead of across like the Ergo. Also, there is plenty of room for much warmer socks as the weather cools. I noticed that the extra room and Techno system did not irritate my 5th metatarsal giving me foot comfort. My feet did not feel confined and I was able to put maximum pressure down while going up punchy climbs. The other true test; at the end of the ride I didn't immediately pull off my shoes. Maybe meaning I could ride a little longer with comfort. I would buy these again.

Reviewed 8/20/2023
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Great road shoe
by Germanrazor
Cycling Enthusiast

This shoe provides a stiff sole and great transfer of power when smashing the pedals or in general pace riding. The micro-click tightening of the Boa system gets an exact tension you need. Have had these for over a year with no issues. I would definitely buy again.

Reviewed 9/24/2023
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The shoe for those with wide feet.
by GenExpresso
Hollywood, Fl
0 of 1 customers found this review helpful.

The Sidi Mega shoes have the widest toe box of any major brands on the market. If you have only slightly wider feet, the Shimano's may be a better fit, but if your foot is E or EE width, then this is the show for you. I like that most parts are user replaceable and that extends the life of the shoe. Also, I find that they are really stiff out of the box and a couple hundred miles help to break them in properly.

Reviewed 7/24/2023
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grewat shoes
by Mark W.
Cycling Enthusiast
Lima, ohio
1 of 1 customers found this review helpful.

Bought a pair of Genius4"s for $195 in 02. had to replace the Velcro last year. This year the instep strap split. Thay have them for sale but are on back order until end of march. meanwhile I taped the split with gorilla tape and will use them for my trainer bike until new ones are in. meanwhile, I Ordered a pair of the same size Genuis 10's (on sale for $276) and they fit perfectly. 21years and old and new ones fit exactly the same. old shoes still in great shape, after 2 minor repairs. Great quality shoes.

Reviewed 2/27/2023
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Excellent but strings loosen during ride
by Anonymous

I love Sidi megas as my 11.5 EEE foot fits great.

Comfortable shoe as previous Megas but I have to stop every 20 miles to tighten strings which is inconvenient

Reviewed 6/5/2023
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