Wahoo Kickr Core2 in Review

2018 was also the year when I couldn't make any sense of indoor biking. NoPain was typing up a guide about Zwift at the time, had for years dutifully logged his kilometres on various ergometers, turbo trainers and rollers, and was becoming increasingly enthusiastic about the virtual progress around Zwift and co. Training like in a computer game — I absolutely had to try it, but I just couldn't grasp it. In my mid-twenties, time-flexible at work and with no family ties, I preferred to ride outside. Inside, that's where I did my squats. Outside I enjoyed the kilometres, delighted in the seasons, rode during the rainy season in the dry spells and in the darker months in the mornings — then, when the sun was shining and everyone else was sitting in the office.

2025 - seven years in the future my world looks completely different. I no longer travel the world for press camps. Mostly, my nightly journeys are along the hallway between the parents’ bedroom and the toddler’s play paradise. Both, of course, in the staid middle-class single-family home. Instead of on expensive review bikes, I’m out with the stroller. Baby and all things baby, building a house and household chores, garden and gardening now fill the "everyday gaps" that in 2018 still belonged to the bike. Everyday life no longer bends to my training - my training bends to everyday life. Time is often only left in the gray fringe hours of the day. In 2025 I can fully understand riding in virtual worlds. Riding in the dry, where I want, how I want, and above all: when I actually can!

With FTP in the basement, annual kilometers like a runner, and the house-building after-effects from Achilles tendon pain to beer belly, I am ready to return to the world of physical fitness. May the Kickr Core 2 and Zwift please guide me through the winter.

In terms of hard facts, the Kickr Core 2’s spec sheet is fundamentally identical to the popular predecessor. Notable here are a stated power accuracy of +/- 2 percent, a maximum resistance of a more-than-amateur-friendly 1,800 watts, and a maximum simulated gradient of 16%. The 5.4 kg flywheel is still among the heaviest in its class (a positive attribute for direct-drive trainers). That very flywheel, with its precise manufacturing, together with advanced algorithms, is also what delivers the characteristically Wahoo realistic and quiet riding experience. Also carried over from the predecessor is the choice between an 11-speed cassette or the innovative Zwift Cog & Click bundle. A brief aside for anyone new to the smart-trainer universe: Put simply, Zwift Cog is a single-speed adapter that allows you to mount almost any 8–12-speed bike on a smart trainer without swapping the cassette. The Cog ultimately simulates up to 24 gears while riding; the Zwift Click controllers in compatible apps handle the virtual shifting (and even navigation in Zwift). Important for upgraders and converters: Both options can be added later; in other words, if you opted for a cassette, you can switch to Zwift Cog later, and vice versa.

Zwift Kickr Core 2 Zwift Cog & Click Bundle

Zwift charges a 50-euro premium for the bundle of new features compared to the old Kickr Core. The centerpiece is the new, directly integrated WiFi system, which not only provides more reliable and stable connections but also enables automatic updates. Also new is the so-called Race Mode, which increases the transmission rate from 1 Hz to up to 10 Hz. For the user, this means that the average power produced is no longer transmitted only once per second, but that the system updates with every flywheel revolution. Even the smallest power spikes during sprints or attacks on climbs are detected and translated into even more realistic pacing, drafting, and pace changes for virtual race situations. Also new: Kickr Bridge simplifies pairing of various sensors (heart-rate strap, etc.) and controllers by connecting them directly through the smart trainer and forwarding them collectively to the app.

Now, at the start of the "indoor season", the miles ridden are still limited. But the first rides (on Zwift) and a completed FTP test feel promising. "Changes of pace" come across very realistically to me, and the Zwift Click controllers mounted on the handlebar not only allow smooth gear shifts, but also navigation through the menus and virtual Zwift worlds. What I particularly like as a new dad: The 18 kg smart trainer not only stands stable; the belt drive and the flywheel with electromagnetically controlled resistance are also quiet enough not to wake the baby, while still letting me hear any calling or crying from upstairs. Less child-friendly, however, are the barely or not at all protected rotating parts such as the flywheel and belt. Riding in the same room with a curious toddler is therefore not an option.

A few more miles and many more drops of sweat are needed before drawing a conclusion about the Wahoo Kickr Core 2. Intervals, performance tests, and base miles are planned for the coming months. Compared to my mid-twenties self, one thing can already be said thanks to the straightforward setup, the quiet operation, and the pleasant ride feel: Indoor biking actually puts a smile on my face. A sentence I never thought I’d hear myself say.