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Rocky Mountain
Instinct C Frameset

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Why We Like The Rocky Mountain Instinct C Frameset

Designed for optimal performance on most trails we encounter, the Rocky Mountain Instinct is an all-around trail bike capable of dishing out much more than its 140mm of travel suggests. Combining dual 29-inch wheels, 140mm of rear travel, and slack and capable geometry, the Instinct splits the line between an aggressive trail bike and a light-duty enduro bike. With 140mm of Smoothlink suspension, the Instinct is efficient on climbs, ruthless on descents, and rides high in travel, giving us a balanced all-around trail bike. Rocky Mountain optimized suspension kinematics by offering every frame size a size-specific tune for optimal small bump sensitivity, mid-stroke support, and bottom-out resistance. This year, the Instinct has been reshaped with various geometry improvements to take our capability and confidence to new levels. Rocky Mountain fitted the Instinct with their simplified Ride-4 adjustment system, featuring four geometry settings ranging from slack to steep so we can tune our frame geometry towards the type of riding we do most often. The Instinct is pretty slack for a trail bike and is equipped with a 63.5–64.3-degree head tube angle (when fitted with a 150mm fork), giving us the front wheel confidence we need to point it down steep trails. In its neutral setting, the Instinct features a longer wheelbase, slacker head tube angle, steeper seat tube angle, a shorter reach, and a shorter standover height compared to the previous model of the Instinct, giving us enhanced capability and a better frame fit for all riders. The 2-position adjustable axle adjusts our chainstay length independently of our frame geometry providing us with a more stable or playful ride, and the included reach-adjust headset cups enable us to increase or decrease our reach by 5mm in each direction. Other notable features on the revised Instinct frame include integrated downtube and chainstay protectors to protect our frame from the chain, rocks, and bottom-outs, and the shuttle guard at the top of the downtube gives us peace of mind when driving to the trailhead.

*Due to a high demand in the global supply chain and bike industry since the start of the pandemic, material weight and exact components are subject to change. We are working diligently to keep tech specs updated, and any adjustments will be of equal or better spec level, If you have any questions, reach out to a Gearhead by chatting online or calling 1-888-276-7130.


  • Mid-travel trail bike designed to shine all over the mountain
  • Smoothwall carbon frame is exceptionally light and stiff
  • 140mm of Smoothlink suspension has a balanced ride feel and mid stroke support
  • Fox Factory Float X rear shock has a custom tune and a 2-position climb switch
  • Ride-4 adjustment system gives us four different geometry settings
  • Internally-tubed cable routing for an easy and tidy cockpit setup
  • 2-position adjustable chainstays allow us to lengthen the bike for more stability
  • Penalty Box 2.0 internal frame storage so we can leave he bag at home
  • Item #RMBB01R
Frame Material
carbon fiber
Wheel Size
Rear Shock
Fox Factory Float X
Rear Travel
Fork Travel
[recommended] 150mm
Head Tube Diameter
1 1/2 - 1 1/8in
Headset Included
Bottom Bracket Type
2-bolt ISCG-05
Cable Routing
enclosed internal
Brake Type
Post Mount
Compatible Components
Boost spacing wheelset, tapered fork, 12-speed drivetrain, internally-routed dropper post
Seatpost Diameter
Seat Collar
Rear Axle
12 x 148mm
Tire Clearance
[rear] 2.5in
downtube protector, chainstay protector, shuttle guard, Ride-4 adjustable geometry, 2-position rear axle, SRAM UDH compatible, Penalty Box 2.0, enclosed internal cable routing
Manufacturer Warranty
5 year

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