Rocky Mountain

InstinctAlloy 30

From$3,399

FrameFORM™ Alloy frame, 140mm…RockShox Psylo Gold RC, 150…

GroupsetShimano Deore 12-speedShimano Deore 12-speed, 1…

WheelsWTB ST i30 TCS 2.0, 28H…Maxxis Minion DHF 2.5 WT EX…

The Rocky Mountain Instinct is a mid-travel trail bike designed to handle a wide variety of terrain without leaning too far into enduro racing territory. With 140mm of rear travel paired with a 150mm fork, it sits squarely in the versatile all-mountain category. Redesigned for 2024, the current generation moves away from sharing a frame with the longer-travel Altitude, gaining its own dedicated chassis. This update brings a simplified Ride-4 geometry adjustment system, reach-adjust headset cups, and integrated downtube storage on carbon models. The Instinct is built for riders who want an adaptable platform that rewards an active, engaging riding style rather than simply plowing through obstacles. It suits those who value the ability to fine-tune their setup for local trails, offering a highly configurable foundation that can shift from a snappy, responsive climber to a stable descender depending on how the frame is configured.

Rocky Mountain Instinct

Year

Build

Size

$3,399

02 / Specifications

Spec sheet.

Every component shipped with this build.

01Frameset

3 components

ForkRockShox Psylo Gold RC, 150mm (27.5: 37mm offset / 29: 42mm offset)

Rear shockRockShox Deluxe Select+ (sealed bearing eyelet | 20x8mm F hardware | XS–SM: 190x45mm | MD–XL: 210x52.5mm | size-specific tune)

02Drivetrain & brakes

10 components

Shift leversShimano Deore 12-speed

Rear derailleurShimano Deore 12-speed

CassetteShimano Deore 12-speed, 10-51T

ChainShimano M6100

CranksetShimano Deore crankset w/ 32T chainring, 24mm spindle (XS–SM: 165mm cranks | MD–XL: 170mm cranks)

Bottom bracketShimano SM-BBMT500

Front brakeShimano MT4120 4-piston hydraulic disc (resin pads)

Rear brakeShimano MT4120 4-piston hydraulic disc (resin pads)

Front rotornull

Rear rotornull

03Wheels & tires

4 components

Front wheelWTB ST i30 TCS 2.0, 28H, tubeless setup (sealant included); Shimano TC500, 15mm Boost; 2.0 stainless

Rear wheelWTB ST i30 TCS 2.0, 28H, tubeless setup (sealant included); Shimano TC500 Boost 148mm; 2.0 stainless

Front tireMaxxis Minion DHF 2.5 WT EXO, Tubeless Ready

Rear tireMaxxis Minion DHR II 2.4 WT EXO, Tubeless Ready

04Cockpit & contact

5 components

StemRocky Mountain 31.8 AM, 40mm, 5° rise

HandlebarsRocky Mountain AM, 760mm width, 25mm rise, 9° backsweep, 5° upsweep, 31.8 clamp

SaddleWTB Volt 142 (steel rails)

SeatpostX-Fusion Manic Composite, 30.9mm (XS: 125mm | SM: 150mm | MD: 170mm | LG–XL: 200mm)

Grips/TapeODI Elite Pro Lock-On

03 / Geometry

Geometry & fit.

4 sizes published.

The Instinct’s geometry is defined by its massive range of adjustability, allowing riders to dramatically alter the bike’s handling and fit. In its neutral setting, the frame features a moderately slack head tube angle and a steep seat tube angle that positions the rider comfortably over the bottom bracket for efficient seated climbing. From there, the Ride-4 flip chip at the shock linkage alters the head angle, bottom bracket height, and suspension progression.

Riders can further tune the fit using drop-in headset cups that shift the reach forward or backward by five millimeters. A two-position rear axle also allows for a ten-millimeter change in chainstay length, letting owners choose between a shorter, more maneuverable rear center or a longer, more stable wheelbase. This modular approach means the bike can feel like a quick, upright trail machine in its steeper, shorter settings, or stretch out into a low, slack descender that requires a more forward, aggressive riding posture to keep the front wheel weighted.

Reach × Stack · size mdmm

Where the handlebar sits relative to the bottom bracket — the single most important fit pair.

01Fit geometry6 values

Stack599 mm

Reach449 mm

Top tube621 mm

Headtube length110 mm

Standover height798 mm

Seat tube length410 mm

02Component geometry5 values

Crank length170 mm

Handlebar width760 mm

Stem length40 mm

Saddle width142 mm

Dropper travel170 mm

03Handling geometry5 values

Headtube angle63.5°

Seat tube angle76.5°

BB drop44 mm

Wheelbase1227 mm

Chainstay length440 mm

Which size should I buy?

Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.

Your height

5'8"173 cm

5'0"5'5"5'10"6'3"6'7"

Recommended sizemdBased on stack, reach & ETT for your height · score 77/100.

→Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.

04 / Other builds

The lineup.

5 builds, ranging $3,399 – $9,449.

Rocky Mountain splits the Instinct lineup across aluminum and carbon frames, with wheel sizes scaled by frame size. Extra-small and small frames use 27.5-inch wheels, while larger sizes roll on 29ers. The entry-level Alloy models offer an accessible starting point, though reviewers note the base Alloy 10 pushes the limits of its budget-focused fork and brakes. Moving up the ladder, the Carbon 50 and Carbon 70 builds represent the sweet spot for value. The Carbon 70, in particular, equips the bike with highly adjustable Fox Performance Elite suspension and a reliable Shimano XT drivetrain, leaving little need for immediate upgrades beyond personal tire preferences.

Only the carbon frames include the PenaltyBox 2.0 downtube storage system. At the top of the range, the Carbon 99 build shifts to a slightly longer 160mm fork and features RockShox Flight Attendant electronic suspension, carbon wheels, and a SRAM XX Transmission drivetrain complete with a power meter. Across most mid-tier builds, the stock Maxxis Dissector tires prioritize fast rolling speeds, though aggressive riders frequently swap them for heavier-casing alternatives to match the frame's descending capabilities.

2025 · Currently viewingAlloy 30

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$3,399On this page

05 / Reviews

From the press.

16 reviews from the cycling press.

Reviewers consistently characterize the Instinct as an agile, energetic trail bike that thrives on rider input. Rather than muting the trail, the suspension and chassis encourage hopping, pumping, and precise line choices. One tester described its character as a "playful, responsive, and sneaky fast fox" (Jeffkendallweed) that excels when ridden dynamically. Cornering is a frequent highlight, aided by a carbon frame that intentionally incorporates a degree of lateral flex. This compliance allows the bike to "bend around turn apexes" (GearJunkie), creating a smooth, carving sensation at speed.

While climbing traction is widely praised, opinions diverge sharply on the factory shock tune. Several testers found the suspension supportive and calm, but others felt the stock compression damping was too light for aggressive riding. One review noted the rear end had a "wallowy mid-stroke" (Pinkbike) that could feel unstable when pushed hard through rough terrain. This active suspension feel also leads to occasional pedal strikes on technical climbs. Additionally, multiple reviewers pointed out that the frame can be noisy over chatter due to internal cable rattle. Despite these critiques, the consensus points to a highly capable descender that climbs competently, provided the rider takes the time to dial in the extensive geometry and suspension settings.