Nearly seven years ago now, we began wondering what Trek was cooking up. The Top Fuel had been the bike of choice for Trek-affiliated race teams. However, something new began to appear at races, which would later be discovered to be the Supercaliber.
And, once again, we are seeing the process repeated. People definitely spotted a new XC bike with the Trek-Unbroken XC team. With its horizontal shock mounted to the top tube, it certainly isn’t a Top Fuel. And, while the new bike has flex stays, it doesn’t feature the IsoStrut, the internally housed rear shock of the Supercaliber.
Nope, this is a completely new bike. And today, Trek pulled back the curtain a bit, telling us more about this new bike, and why it’ll likely never hit store shelves.
A Trek XC Prototype
So why the new bike? Was something wrong with the Supercaliber? Certainly not, but Trek’s designers and engineers have acknowledged that their flagship XC race bike perhaps isn’t designed for the XC tracks racers face today.
Simply put, the sport has evolved. Longer rock gardens, drops, doubles, and just trails that most of us would want 150mm of travel on. For these spicier tracks, the 80mm Supercaliber just wasn’t cutting it, with plenty of racers reaching for the Top Fuel, despite the weight penalty.
So, work officially began on a new XC Prototype bike in January 2024. The bike would, on the one hand, be a unique build from the ground up. On the other hand, Trek brought loved aspects from both the Supercaliber and Top Fuel platforms. And their goal was simple: craft the fastest 29er XC race bike possible.
Trek’s first step was to develop a suspension platform. Similar to the Supercaliber, they ditched the tried-and-true Active Braking Pivot suspension system synonymous with Trek in favor of flex stays. They also tested two different link options–a “swing” link and a “flapper” link–with the latter winning out.
Along with the flapper link and flex stays, they also decided to provide the prototype with 115mm of travel. While this is a touch less than what many other brands offer on their XC race bikes, Trek felt it was ideal for them. It offered enough travel for the rough tracks XC racers are encountering today, while remaining supportive for an efficient pedaling platform.
Next, they needed to design the frame, with weight and efficiency as the utmost priorities. Engineers at Trek analyzed how and where different sections of the frame performed under stress. This allowed them to rework the tube shape and design where it was needed, adding or eliminating material where it made sense.
Trek said the “end product is a svelte package for a hardier XC race bike, tailor-made for today’s World Cup circuit.”
But Can You Buy It?
It doesn’t appear so. Trek says that while it is the fastest XC race bike they have ever made, it apparently isn’t the end result.
“The prototype is simply one step in a constantly churning iterative process within the walls of Waterloo. You may not ride this bike, but rest assured that something even bigger and better is in the works.”
While we may never get to throw a leg over this bike, Trek promises that what they have learned from this will make its way into future bikes.
