FIZIK’s new Transiro Powerstrap R4 – tri shoe with super-quick foot entry

Introducing the fizik Transiro Powerstrap R4 – a high-performance triathlon shoe ideal for short distance competitions, featuring the innovative new Powerstrap closure system


Transiro Powerstrap R4 is an important model in fizik’s new Transiro triathlon series of shoes and saddles – a series that has been created for uncompromised cycling performance in multisport competition, and the most efficient transitions possible.

This fast-entry shoe is designed with features optimally suited to sprint or short distance triathlon formats, where saving every split-second in transition matters, yet without compromising comfort and performance on the cycling leg.

Transiro Powerstrap R4 is our first triathlon-specific shoe featuring the new Powerstrap closure system: an extremely quick and intuitive to use, enveloping Velcro closure.


Quick foot entry – easy and intuitive
Transition is often referred to as triathlon’s fourth discipline, and saving time here is where the Transiro Powerstrap R4 comes into its own.

Powerstrap is super-quick to fasten: athletes simply slide their foot into the shoe, pull to fit, and roll out from T1 without hesitation. The twin Velcro straps are designed to pull an extended area of the shoe’s upper, so the fit is enveloping and secure, even with a relatively simple system.

To ease transition, the Powerstrap can be locked in the wide open position ready for quick and easy foot entry. The heel has a rubberized loop for setting the shoes ready clipped into the pedals, and you can easily pull them onto your feet.

Leading materials & construction
The design of the Transiro series has been influenced by feedback and input from leading professional triathletes. All Transiro shoes’ advanced materials, technologies and construction techniques are based on what we’ve learned from years of developing high-performance road racing shoes with and for WorldTour cyclists.

Transiro Powerstrap R4’s upper is constructed combining mesh – for superior ventilation – with Microtex, to ensure appropriate foot support in every pedal stroke.

The upper is complemented by a moderately stiff R4 carbon injected nylon outsole. It delivers a carefully considered balance between comfort and pedalling efficiency while still providing effective ventilation for temperature control.

Transiro Powerstrap R4 is available worldwide now in two colorway options and a full range of sizes from all good stockists and
TRANSIRO: Triathlon series, designed for uncompromised cycling performance and efficient transitions
ROAD: Designed and engineered to perform on paved roads, from the smoothest tarmac to the most demanding pavé
Shoe specifications
Transiro Powerstrap R4
•    Powerstrap closure system
•    R4 outsole – carbon injected nylon
•    Weight: 508g (size 42)
•    Sizes: 36-48 (37 to 47 also in half sizes)
•    Colors: Black/White, Black/Red

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