Welcome to the next level! With Rockshox suspension and high-performance components, the 4.0 gets an A grade all across the board.
- RockShox Dart 3 front fork offers 100mm of travel, spring adjustable preload and rebound and on-off damping system for serious performance and control
- SRAM 27-speed drivetrain delivers smooth, crisp shifts and just the right combination of gears for uphill grinds or downhill blasts!
- Hayes Sole hydraulic disc brakes for spot-on stopping power
- WTB Mutano Raptor tires handle aggressive techniques over any terrain—from wet roots to sand, plus they corner, climb and brake like a champ
- Zed Pro Butted 6061 aluminum in a gusseted design shaves weight while providing a tougher, more stable platform
- WTB Pure V saddle blends lightweight performance with a tough yet comfortable design
- WTB Speed Disc wheelset paired with Shimano hubs make a formidable team for lightweight, durable performance
- Crank out the miles and keep 'em coming--Truvativ FiveD crankset is built to last
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
View all K2- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
| Best Use | Mountain Biking |
|---|---|
| Frame | Aluminum 6061-series w/disc mounts |
| Fork | RockShox Dart 3, 100mm travel |
| Crankset | Truvativ FiveD, Powerspline, 22/32/44t |
| Bottom Bracket | TruVativ Powerspline cartridge |
| Shifters | SRAM SX-5 trigger, 9-speed |
| Front Derailleur | SRAM X-7 |
| Rear Derailleur | SRAM X-7 |
| Rear Cogs | SRAM PG-950 11-32, 9-speed |
| Brakes | Hayes Sole hydraulic disc |
| Brake Levers | Hayes Sole |
| Rims | WTB Speed Disc |
| Front Hub | Shimano disc specific |
| Rear Hub | Shimano disc specific |
| Tires | WTB Mutano Raptor, 26 x 2.1" |
| Handlebar | Truvativ LE riser |
| Stem | Alloy threadless |
| Seat Post | Alloy micro-adjust |
| Saddle | WTB Pure-V Race |
| Pedals | Alloy MTB |
| Headset | TH,1-1/8" threadless "Intelliset" |
| Chain | KMC Z9000 |