Justyna Jarczok does not build bikes for short rides. As an ultra-distance cyclist based in Poland and a Kona test team rider, her equipment choices are shaped by days in the saddle, minimal sleep, changing terrain, and the need for a bike that remains predictable when everything else becomes uncertain. This custom Hei Hei CR is one of her race bikes for the 2026 season, built with a very specific goal in mind: go far, stay efficient, and keep moving forward no matter how long the route becomes.
At its core, the Hei Hei CR is already known for its balance of efficiency and control. For Justyna, that balance needed to be pushed further toward endurance racing, where comfort, reliability, and energy conservation matter just as much as outright speed. The result is a build that looks clean and purposeful, but is packed with details chosen for ultra-distance performance.
The frame and suspension form the backbone of the bike. Justyna is riding a size small Kona Hei Hei CR frameset paired with a RockShox Pike Ultimate fork set to 130mm and a RockShox Deluxe Ultimate rear shock delivering 120mm of rear travel. This setup gives her enough forgiveness to stay fresh over rough terrain, without sacrificing the pedaling efficiency needed for long stretches of climbing and fast gravel connectors.
Rolling efficiency and durability were non-negotiable when it came to wheels and tires. The bike runs on FSA KFX I28 wheels, chosen for their balance of weight, strength, and reliability under long race conditions. MAXXIS Recon Race tires in a 29 x 2.25 configuration offer low rolling resistance while still delivering predictable grip across mixed surfaces. The 3C MaxxSpeed compound, 120 TPI casing, and Exo protection are supported by FLAT-OUT inserts and MAD PIG valves, adding another layer of security against flats when time lost can mean the end of a race.
The cockpit reflects Justyna’s focus on efficiency and control over ultra-long distances. An FSA KFX Flat ICR handlebar and FSA KFX 2-Bolt stem with a negative 20-degree angle keep her position aggressive but sustainable. SQ Labs inner bar ends add extra hand positions for long hours on the bike, helping to reduce fatigue and keep her moving efficiently. Fizik Terra Comfortfeel grips provide a secure, cushioned interface that stays comfortable deep into a race.
Drivetrain choices were made with simplicity, range, and reliability at the forefront. SRAM Eagle 90 T-Type shifting provides crisp, dependable performance under load, paired with a Garbaruk 12-speed cassette and a 32-tooth Garbaruk chainring. Garbaruk XC cranks in a 165mm length help maintain cadence and efficiency over long days. The combination gives Justyna the gearing range she needs for steep climbs while preserving speed on flatter sections.
Braking performance is handled by SRAM Motive Ultimate brakes, offering consistent modulation and control regardless of conditions or fatigue. A FOX Transfer SL dropper post with 125mm of travel adds versatility for technical descents without unnecessary weight, while a HOPE dropper lever ensures smooth and reliable actuation.
Comfort remains a defining element of this build. A custom Posedla Joyseat 3.0 Ultra saddle is tailored specifically for Justyna, reflecting the reality that contact points can make or break an ultra-distance race. Look X-Track Power Single pedals provide reliable engagement and power data, allowing her to manage effort carefully across multi-day events.
Carrying capacity and visibility are essential for long-distance racing, and this bike is equipped accordingly. Restrap bags are mounted for efficient storage of nutrition, tools, and mandatory gear, while Exposure Lights ensure dependable illumination during long nights on course. Navigation and data are handled by a COROS Dura Solar GPS unit, mounted via a FARR GPS Bolt-On Carbon Mount for a clean and secure setup.
This Hei Hei CR is not built to impress in the parking lot (although it most definitely does). It is built to disappear beneath the rider, to stay quiet and predictable when exhaustion sets in, and to keep moving when the finish line is still a long way off.
