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2018 Trek

Procaliber 6

A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price

$1,889
Weight27.3 lbs  
FrameAluminum
SuspensionHardtail, 100mm
ForkRockShox Recon Gold RL
Wheels27.5″ / 29″ Aluminum
Drivetrain2 × 11
GroupsetXT, SLX
BrakesShimano Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Procaliber 6
Other Crosscountry bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

28 mph

Procaliber 6

27 mph

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Trek Procaliber is a lightweight cross-country bike praised for its stiff, accurate frame and innovative IsoSpeed technology, which enhances comfort on rough trails. However, its performance is mixed, with some reviewers noting issues with steering precision and the effectiveness of the IsoSpeed system being limited to seated riding. The bike excels in efficiency and climbing, thanks to its SRAM Eagle groupset, but some components like the tyres and fork stiffness have been points of criticism.

Pros
  • Lightweight and stiff frame

  • Innovative IsoSpeed technology for enhanced comfort

  • Efficient SRAM Eagle groupset for climbing

  • Quality fork and accurate tracking

  • Internal cable routing and Di2 compatibility

Cons
  • IsoSpeed benefits limited to seated riding

  • Poor steering precision in some models

  • Soft carbon wheels and frame affect handling

  • Some components like tyres and fork stiffness criticized

Key Quotes
The accurate-tracking frame and quality fork mean you can drive the front end hard, once you’re used to the bar.
BikeRadar logoBikeRadar
The Procaliber with its fancy IsoSpeed is a clever approach to providing comfort in the otherwise harsh world of racing hardtails.
Flow Mountain Bike logoFlow Mountain Bike
Despite not being as stiff as the Trek Crockett 7 Disc cyclocross bike, the Procaliber 9.9 SL sprints swiftly when accelerating.
Gran Fondo Magazine logoGran Fondo Magazine

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BikeRadar
Trek Procaliber 6 review

Mar 2019 · Guy Kesteven

Accurate, versatile frame with a great spec, but bar and IsoSpeed bounce won’t suit everyone

Highs
  • Stiff, accurate frame

  • Dropper and bigger-tyre friendly

  • Judy fork and Eagle gears

  • Shock-shrugging IsoSpeed

Lows
  • IsoSpeed takes a wallop to start moving and then a while to stop

  • Backswept bar and seat tube won’t suit all

  • Surprisingly slow tyres

Read Review

Gran Fondo Magazine
Trek Procaliber 9.9 SL Race Shop Limited Review

Dec 2017 · Robin Schmitt

How does a pro-level mountain bike from the XC World Cup compete against a gravel bike? We tested the Trek Procaliber 9.9 SL Race Shop Limited to find out.

Read Review

Mountain Bike Action
Review - Trek Procaliber 8

Nov 2017 · MBA Action

Trek takes their IsoSpeed Decoupler and builds it into a more affordable aluminum frame.

Read Review

Singletrack World
Review: Trek Procaliber 9.8 SL

Oct 2016 · Wil Barrett

What did Olly think of the Trek Procaliber in the Flat Out Race Bike Group Test? Read his review in full here!

Read Review

Flow Mountain Bike
Tested: Trek Procaliber 9.8 SL

Jul 2016

What is it? The Procaliber 9.8 SL comes from a three-tiered lineup of carbon hardtails, Trek’s premium cross country race bike. Used by the Trek Factory team including Aussie champs Bec Henderson and Dan McConnell this frame has been widely accepted in the racing community. The Procaliber uses Trek’s Smart Wheel Size arrangement, meaning the …

Highs
  • IsoSpeed is successful in taking the sting out of the trail when seated.

  • Stunning frame construction.

  • Lightweight parts.

Lows
  • Not to be confused as a suspension bike, it's still a hardtail.

Read Review

Enduro Mountainbike Magazine
First Ride | Trek's Top Fuel and Procaliber, Blurring the Lines

Jul 2015 · Trev Worsey

XC race bikes are traditionally an acquired taste, steep, uncompromising and brutally efficient. Any thoughts of comfort and fun are secondary to milking out every watt of energy from a rider who resembles nothing more than a huge set of lungs and set of shaved muscular legs. So imagine our surprise when we took to […]

Read Review

Bicycling
First Look: 2016 Trek Top Fuel, Procaliber, and Fuel EX29

Jul 2015 · Matt Phillips

Three new mountain bikes get a Boost

Read Review

MTBR
Trek Procaliber SL, Top Fuel and Fuel EX 29 revamped

Jul 2015 · Jeroen Tiggelman

Turning its focus on its cross-country racing bikes, Trek made some significant changes to its XC line. Most notable is the introduction of the Isospeed coupler in to the Procaliber hardtail line. - Mtbr.com

Read Review

Geometry
Specs
Build
Frame

Alpha Platinum Aluminum, IsoSpeed, E2 tapered head tube, internal derailleur routing, balanced post mount brake, PF92, Boost148, G2 Geometry on 29ers

BB StandardBB86/BB92, Press Fit

Fork

RockShox Recon Gold RL, Solo Air, remote lockout, fast black uppers, E2 tapered steerer, G2 Geometry w/51mm offset on 29ers, Boost110, 100mm travel (13.5: 80mm travel)

Travel100mm

Spring TypeAir

Bottom Bracket

PF92

Headset

FSA IS-2, 1-1/8˝ top, 1.5˝ bottom

Stem

Bontrager Elite, 31.8mm, 7 degree

Handlebar

Bontrager alloy, 31.8mm, 5mm rise, 720mm width

Saddle

Bontrager Evoke 2, chromoly rails

Seatpost

Bontrager alloy, 2-bolt head, 31.6mm, 8mm offset

TypeRigid

Pedals

Not included

Grips

Bontrager Race Lite, lock-on

Groupset
Rear Derailleur

Shimano Deore XT M8000, Shadow Plus

Front Derailleur

Shimano SLX M7020

Crank

Race Face Aeffect, 36/26

Shifters

Shimano SLX M7000, 11 speed

Cassette

Shimano SLX M7000, 11-42, 11 speed

Chain

KMC X11-1

Brakes

Shimano M425 hydraulic disc

TypeShimano Hydraulic Disc

Wheels
Rims

Bontrager Duster Elite Tubeless Ready 28-hole, tubeless strips and valves sold separately

Front Hub

Bontrager sealed bearing, alloy axle, centerlock, Boost110

Rear Hub

Bontrager sealed bearing, centerlock, Boost148

Tires

Bontrager XR2 Team Issue, Tubeless Ready, 120 tpi, aramid bead, 29x2.20˝ (13.5 & 15.5: 27.5x2.20˝)

Rider Notes
Riders Also Viewed

First added July 23

Last updated February 15

Not listed for 3,025 days