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Item # DIA0044

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  • Silver/Black/Yellow Fluo, 38.0 ($44.75)
  • Silver/Black/Yellow Fluo, 45.0 ($44.75)
  • Silver/Black/Yellow Fluo, 46.0 ($44.75)
  • Silver/Black/Yellow Fluo, 47.0 ($44.75)
  • Silver/Black/Yellow Fluo, 48.0 ($44.75)
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Item # DIA0044

Light on the top and stiff on the bottom.

Diadora built the new Sonic Shoes using lightweight, breathable upper materials combined with its tri-specific closure. It then mated this to an ultra-stiff carbon/nylon composite outsole in order to give you a lighweight, affordable package that blends the most important qualities that we look for into a single pair of triathlon shoes.

Diadora built the Sonic Shoes around its Regular Plus last. This last shape forms precisely to your foot, combining just the right amount of arch support with forefoot and midfoot hold, but provides a slightly larger toe box than its Race Shape last. Additionally, this design lends itself to securing heel retention as well. The Sonic's microfiber and lightweight mesh upper construction was designed to support pedaling motions with its ultra-stable and breathable composition. At the heel cup, Diadora designed the Sonic to perfectly contain the rider's foot in its seat by armoring the delicate Achilles tendon with a two-part composition. For structural rigidity, the pre-molded thermoplastic polyurethane heel cup uses a firm composite around the back, with softer and more flexible plastics along the sides.

The closure system incorporates two separate tri-specific straps that each performs specific retention functions. Across the forefoot, Diadora added its V-Fit hook-and-loop strap that allows you to easily control the volume over the forefoot. Moving up from that is the 40mm wide hook-and-loop strap. This strap's anchor point is positioned on the outside of the foot, allowing you to secure your fit in conjunction with the opposite-closing lower strap. The combination of these two straps provides you with the ultimate customizable retention and support.

Diadora chose to mate the Sonic's lightweight upper to its Dual sole. This carbon-reinforced composite platform keeps stack height and weight to a minimum, while maintaining a high level of rigidity for a direct transmission of power to the pedals. The heel pad is made of a firm replaceable rubber compound known as Duratech, which provides excellent surface grip and high abrasion resistance while transitioning from one leg of your tri to the next.

The Diadora Sonic Shoes are available in even sizes ranging from 37.0 to 48.0 and in the color Silver/black/yellow fluo.

Tech Specs

Upper Material:
[upper] Suprell-Tech, [upper] Air Mesh
hook and loop straps
removable EVA
nylon reinforced with fiberglass
Cleat Compatibility:
3-hole road
Recommended Use:
Manufacturer Warranty:
1 year

Size chart

Fuji Bicycles


Geometry Chart


Altamira LTD

Seat Tube


Effective Top Tube








Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop


Chainstay Length



44 44.0cm 51.5cm


36.3cm 72.1cm


72.0 deg 75.0 deg 6.9cm 40.5cm 97.1cm
47 47.0cm 53.0cm


37.0cm 74.1cm 13.0cm 72.5 deg 74.5 deg 6.9cm 40.5cm 97.7cm
50 50.0cm 54.5cm 54.0cm 37.0cm 76.0cm 14.0cm 73.0 deg 73.5 deg 6.9cm 40.5cm 97.6cm
53 53.0cm 56.0cm 56.0cm 37.9cm 78.3cm 16.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 98.6cm
55 55.0cm 57.5cm 58.0cm 38.9cm 80.1cm 18.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 100.1cm
58 58.0cm 59.0cm 60.1cm 39.7cm 82.1cm 20.0cm 74.0 deg 73.5 deg 6.9cm 40.5cm


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Here's what others have to say...


Not comfortable

    The size seems right but the shoes hurt my feet they feel like they have a somethings sticking into my foot. I could not imagine wearing them on much of a ride.