The Trek Procaliber Carbon 2025 arrives with the new IsoBow technology to bid farewell to IsoSpeed

The new Trek Procaliber Carbon 2025 is presented as a model that takes hardtail XC to the next level thanks to its new and exclusive IsoBow technology. And it is something that must be taken into account when this statement comes from the brand that invented short-travel full suspension bikes when the market trend was just the opposite.

Key features of the Trek Procaliber Carbon 2025

• Completely new carbon frame and 200g lighter than the previous generation
• IsoBow technology to absorb vibrations and obstacles
• New geometry
• More generous wheel clearance for tires up to 2.4"
• Increased fork travel: 120 mm
• Floating rear brake mount
• The lightest Trek Procaliber in the range weighs 10.58kg

New Trek Procaliber Carbon with IsoBow technology

Extremely light, comfortable, and capable. The latest version of the Procaliber Carbon replaces its rear IsoSpeed pivot with the new IsoBow technology, but its innovations go further and feature a 120mm fork, 29? wheels, and updated geometry for fast riding on any terrain.

As we have already seen in other models of the brand, such as the Madone road bike, Trek is offering structural solutions in its frames to function as a vibration and impact absorption system. Just like the new Isobow in this Procaliber Carbon.

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The IsoBow works by extending the seatstays in front of the seatpost to create a structure that allows flexing and dissipating vibrations caused by any obstacle and challenging trail sections. The IsoBow increases the rider's comfort, reduces weight from the assembly, and translates into energy savings.

The Procaliber Carbon introduces a new geometry for a new XCO. With the circuits of the discipline becoming increasingly demanding, bikes must evolve to not lose time in technical sections. In that sense, the Procaliber arrives ready to mount longer-travel forks, up to 120mm, capable of absorbing any obstacle or saving a bad landing. A more relaxed 67° head angle along with a longer reach offer great stability at high speeds, and a more vertical seat angle helps maintain a more centered attack position on climbs or pedaling sections.

Thanks to the new IsoBow system, which eliminates moving parts, a redesigned frame, and other details, such as the absence of handlebar lockout, Trek has managed to shave about 200g off the weight of the new frame compared to the previous generation.

Trek Procaliber Carbon 2025: models and setups

Procaliber 9.5

• Colors: Gloss Dark Prismatic/Matte Trek Black, Radioactive Red/Trek Black
• Frame: OCLV Mountain Carbon, IsoSpeed, tapered head tube, Knock Block, internal control routing, balanced post mount brake, Boost148
• Fork: RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 100mm travel
• Wheels: Bontrager Kovee, double-wall, Tubeless Ready
• Tires: Bontrager XR2 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.20"
• Shifter: Shimano Deore M6100, 12 speed
• Rear Derailleur: Shimano Deore M6100, long cage
• Crankset: Shimano MT511, 30T steel ring, 52mm chainline
• Bottom Bracket: Shimano MT500, 92mm, PressFit
• Cassette: Shimano Deore M6100, 10-51, 12 speed
• Chain: Shimano Deore M6100, 12 speed
• Saddle: Bontrager Verse Comp, steel rails, 145mm width
• Seatpost: Bontrager alloy, 31.6mm, 12mm offset, 400mm length
• Handlebar: Bontrager Rhythm Comp, alloy, 31.8mm, 15mm rise, 750mm width
• Stem: Bontrager Rhythm Comp, 31.8mm, 0 degree
• Grips: Bontrager XR Trail Comp, nylon lock-on
• Headset: FSA IS-2, 1-1/8" top, 1.5" bottom
• Brakes: Shimano MT200 hydraulic disc
• Weight: 11.08 kg

Procaliber 9.6

• Colors: Galactic Grey/Lithium Grey, Mulsanne Blue
• Frame: OCLV Mountain Carbon, IsoSpeed, tapered head tube, Knock Block, internal control routing, balanced post mount brake, Boost148
• Fork: RockShox Recon Gold RL, DebonAir spring, Motion Control damper, lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 110mm travel
• Wheels: Bontrager Kovee Comp 25, Tubeless Ready
• Tires: Bontrager XR2 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.20"
• Shifter: Shimano SLX M7100, 12 speed
• Rear Derailleur: Shimano XT M8100, long cage
• Crankset: Shimano MT611, 32T steel ring, alloy spider, 52mm chainline
• Bottom Bracket: Shimano MT500, 92mm, PressFit
• Cassette: Shimano SLX M7100, 10-51T, 12 speed
• Chain: Shimano Deore M6100, 12 speed
• Saddle: Bontrager Verse Elite, austenite rails, 145mm width
• Seatpost: Bontrager Comp, 6061 alloy, 31.6mm, 8mm offset, 400mm length
• Handlebar: Bontrager Rhythm Comp, alloy, 31.8mm, 15mm rise, 750mm width
• Stem: Bontrager Rhythm Comp, 31.8mm, 0 degree
• Grips: ESI Chunky
• Headset: FSA IS-2, 1-1/8" top, 1.5" bottom
• Brakes: Shimano hydraulic disc, MT501 lever, MT500 caliper
• Weight: 12.13 kg

Procaliber 9.7 AXS

• Colors: White Prismatic, Carbon Blue Smoke/Deep Dark Blue
• Frame: OCLV Mountain Carbon, IsoSpeed, tapered head tube, Knock Block, internal control routing, balanced post mount brake, Boost148
• Fork: RockShox Reba RL, Solo Air spring, Motion Control damper, remote lockout, tapered steerer, 51mm offset, Boost110, 15mm Maxle Stealth, 110mm travel
• Wheels: Bontrager Kovee Elite 30, OCLV Mountain Carbon, Tubeless Ready
• Tires: Bontrager XR2 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.20"
• Shifter: SRAM AXS POD SRAM GX Eagle AXS, T-Type
• Crankset: SRAM GX Eagle, DUB, T-Type, 34T, 55mm chainline
• Bottom Bracket: SRAM DUB, 92mm, PressFit
• Rear Derailleur: SRAM Eagle XS-1275, T-Type,10-52, 12 speed
• Chain: SRAM GX Eagle, T-Type, 12 speed
• Saddle: Bontrager Verse Elite, austenite rails, 145mm width
• Seatpost: Bontrager Pro, OCLV Carbon, 31.6mm, 0mm offset, 400mm length
• Handlebar: Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 0mm handlebar rise, 750mm width, -13 degree stem rise ESI Chunky
• Headset: FSA IS-2, 1-1/8" top, 1.5" bottom
• Brakes: SRAM Level Bronze 2-piston hydraulic disc
• Weight: 10.58 kg