Trek Boone 9 Disc

5.0 stars
 (1 Review)
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Trek enlisted multiple World Cup-winning Katie Compton to design the ultimate cyclocross racing bike. The result is the Boone 9 Disc, a bike with 'cross-specific features like plenty of mud clearance, exceptional race geometry, a chain keeper, internal cable routing, and an easily shouldered top tube. The 600 Series OCLV carbon frame and E2 carbon fork is, of course, stiff and precise, yet Trek’s innovative IsoSpeed decoupler adds comfort and compliance to every bumpy, rutted course. Combine that with the flawless shifting of 11-speed Ultegra and the top-end performance of Shimano hydraulic disc brakes, not to mention tubeless-ready Bontrager wheels with fat tires and a slew of lightweight Bonty components, and you're ready to climb the top step on the podium.

Features & Info

Geometry chart

E2 Head Tube

Trek's E2 head tube is 1 1/2 inches in diameter at the bottom and 1 1/8 inches at the top. This maximizes front-end stiffness for awesome steering precision and control, while allowing the use of standard 1 1/8-inch stems and not adding much weight.

IsoSpeed Fork

Trek's IsoSpeed fork is ingeniously engineered with reversed dropouts, increased fork rake (offset) and a constant, gentle curve beginning at the crown and sweeping all the way to the axle. These brilliant innovations allow the fork to absorb shocks rather than transmitting them to the rider for optimum comfort and energy savings, and they also increase the fork's lateral stiffness for more control.

IsoSpeed Decoupler

Trek IsoSpeed Decoupler

90mm-wide bottom bracket

Trek's BB90.
Trek's Boone features a 90mm-wide bottom bracket. This extra width allows Trek to build frames with larger-diameter tubes for improved power transfer. The BB90 bearings are placed directly into the frame to save weight. The combined weight-savings and improved power transfer ensure additional pedaling efficiency and simplify maintenance.

Electronic drivetrain integration

Pedals sold separately

Consumer Reviews

5.0 stars

(1 review)

100% of respondents would recommend this to a friend.


  • Responsive 
  • Quick 
  • Smooth 


  • Cable Routing 

Best Uses

  • Cyclocross 
  • Gravel 

Feb 09, 2015

The Boone is a game changer

Smooth, Responsive, Quick
Cable Routing
Best Uses:
Cyclocross, Gravel
This is an amazing cyclocross race bike that is equally at home on gravel roads. I not only use it for competitive racing but also as my everyday road bike during the summer. it's a dream to ride. The Iso-Speed seat decoupler makes for the smoothest riding bike I've ever ridden and the handling is spot on in all conditions.
by The622Realm from Omaha, NE


Trek 600 Series OCLV carbon w/IsoSpeed decoupler
Trek IsoSpeed Cross, carbon w/tapered steerer
Bontrager Affinity Elite
See Rims/Wheels
See Rims/Wheels
Bontrager CX3 Team Issue, 700 x 32c
Shimano Ultegra
Bottom Bracket
Front Derailleur
Shimano Ultegra
Rear Derailleur
Shimano Ultegra
Rear Cogs
Shimano Ultegra, 11-speed: 11-28
Shimano Ultegra
Bontrager Race Lite IsoZone
Bontrager Gel Cork
Bontrager Race X Lite
Brake Levers
Shimano R655 hydraulic-disc, 5-inch rotors
Bontrager Paradigm RL
Bontrager Ride Tuned carbon seatmast cap, 20mm offset
Accessories & Extras
3S Chain keeper, hidden fender mounts