Trek's new Procaliber cross-country bike introduces IsoBow technology
And a companion alloy build gets modern XC bike features.
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Specialized's new Epic 8 (and Chisel) as well as Pinarello's Dogma XC have been the defining bikes of 2024. Although a little late to the party, Trek has unveiled its new Procaliber that bins its IsoSpeed decoupler in favour of a new IsoBow technology. Plus, there's a new alloy build. Here's everything we know.
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The new Trek Procaliber is a hardtail cross-country bike designed to appeal to everyone, whether they're completely new to the sport or racing at this weekend's World Championships. But, like many top-level XC hardtails, this bike prioritises lightweight over comfort, compared to a full suspension bike.
Although the newest Procaliber ditches the IsoSpeed decoupler, compliance is still a top talking point as Trek has replaced that technology with IsoBow. The brand says that IsoBow provides the same seated compliance as IsoSpeed but sheds weight by taking advantage of the flex of carbon fibre. This is done by building the bike with long seat stays that extend beyond the seat tube.
2024 trek procaliber carbon isobow.jpg, by Liam Mercer
'More' is also a big subject with the Procaliber as Trek has graced it with bigger suspension travel. It now runs 120mm of squish up front, making it competitive with nearly all of the current crop of XC bikes. It also gets more tyre clearance with room for a 2.4in rear tyre and its geometry has seen quite the overhaul.
The new bike welcomes a 1.8-degree slacker head tube of 67-degrees and the effective seat angle is steeper at 74.3-degrees. Reach figures have stretched by 10mm with a large frame now running a 460mm measurement and that's all been added to achieve calmer handling for more confidence and a faster ride.
2024 trek procaliber carbon ft.jpg, by Liam Mercer
As seen on the Supercaliber Gen 2, the Procaliber features a floating brake mount. Trek says that it isolated braking forces from the seat stay's flex, which allows for the seat stays to flex more freely and provide more comfort. The brand also suggests that braking should be more consistent as a result.
The new Trek Procaliber Carbon is available in three models with claimed weights ranging from 12.13kg on a medium famed 9.5 build down to 10.58kg on the 9.7 AXS build.
2024 trek procaliber alloy 1.jpg, by Liam Mercer
Released alongside the Procaliber Carbon is Procaliber Alloy, which takes the place of the outgoing X-Caliber. It's designed for new riders and gets many of the changes found on the carbon bike. Those include 120mm suspension forks and similar geometry tweaks.
While it doesn't benefit from IsoBow, it does get 2.4in tyres and a 148x12 thru-axle, fender mounts and a Universal Derailleur Hanger. Then, handy for newer riders, the tyres are set up tubeless from stock.
We don't have GBP pricing yet but we will update this piece as soon as we know.
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