In these conditions the narrow cyclocross tires of the Trek Crockett dig much deeper into the ground. Only on damp and soft surfaces do the narrow shoulder knobs result in imprecise cornering and poor traction on climbs. The light DT Swiss XMC 1200 carbon wheels combined with the lightly-treaded 2.2” Bontrager XR1 Team Issue tires roll incredibly well on the gravel, offering a great blend of comfort and traction. In addition, the bigger volume of mountain bike tyres also puts a limit to the efficiency and purpose of this technology.ĭespite not being as stiff as the Trek Crockett 7 Disc cyclocross bike, the Procaliber 9.9 SL sprints swiftly when accelerating. This means mountain bikers might enjoy the benefits of the IsoSpeed on technical uphills, but will eventually get out of the saddle when the climbs get harsher. While roadies tend to steam through the pavé of the Paris-Roubaix in the saddle, most mountain bikers spend far less time seated. All this sounds great in theory, but in practice we weren’t able to fully appreciate the perks of the IsoSpeed technology – and this really depends on the riding style the IsoSpeed technology only shows its benefits when riding seated. The almond-shaped taper in the lower part of the seat tube is supposed to provide for even more comfort. An alloy pivot allows for decoupling of the seat tube from the top tube and seatstays, providing for more vertical flex and added riding comfort. As a roadie you may have seen this already on the Madone and the Domane. The IsoSpeed technology is the standout feature of the Procaliber. Sure you can get even lighter XC racers, but we all know that weight isn’t everything – within reason. Light enough to put the € 7,999 Trek Procaliber 9.9 SL right in the middle of our gravel test-field. Despite a suspension fork, wide tires, 29″ wheels, and a whole bunch of mountain bike components, the 18.5″ frame size of the Procaliber weighs in at just 9.02 kg.
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