How to Choose Mountain Bikes
Rocky Mountain Instinct Alloy 50 Mountain Bike
$4,599.00
Members get an est. $459.90 in rewards
Designed to do it all, this Rocky Mountain bike excels on technical trails. It inspires confidence on the ups, downs and everywhere between.
Key Details
Wheel Size
XS: 27.5 inches
S: 27.5 inches
M: 29 inches
L: 29 inches
XL: 29 inches
Fork Travel
150 millimeters
Number of Gears
12 gear(s)
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- This mountain bike features updated geometry, frame features and suspension kinematics
- RIDE-4â„¢ adjustment system allows you to quickly fine-tune the geometry with a single Allen key; 4 configurations are possible, thanks to 1 rotating chip
- Reach Adjust headset allows you to fine-tune the ride with center, +5 mm and -5 mm offset options
- 2-position axle lets you choose a short or long rear-center length to suit your personal preferences
- Size Specific TUNEâ„¢ ensures that riders of all sizes get the right balance of small-bump compliance, mid-stroke support and end-stroke progressiveness
- The Rocky Mountain design team does custom shock tunes based on real-world field testing and adjusts each tune for specific frame sizes
- This bike also has size-specific chainstay lengths to offer a balanced ride across all frame sizes
- Pedals not included
- 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 Rocky Mountain Full-Suspension Mountain Bikes- 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 | FORM alloy |
| Step-Through | No |
| Mountain Bike Style | Trail |
| Bike Suspension | Full Suspension |
| Fork | XS: Fox 36 Float EVOL GRIP Performance Series, 150 mm travel; 37 mm offset S: Fox 36 Float EVOL GRIP Performance Series, 150 mm travel; 37 mm offset M: Fox 36 Float EVOL GRIP Performance Series, 150 mm travel; 44 mm offset L: Fox 36 Float EVOL GRIP Performance Series, 150 mm travel; 44 mm offset XL: Fox 36 Float EVOL GRIP Performance Series, 150 mm travel; 44 mm offset |
| Fork Travel | 150 millimeters |
| Rear Shock | Fox Float X Performance, 140 mm travel |
| Crankset | XS: Race Face Ride Cinch 32T, 165 mm S: Race Face Ride Cinch 32T, 165 mm M: Race Face Ride Cinch 32T, 170 mm L: Race Face Ride Cinch 32T, 170 mm XL: Race Face Ride Cinch 32T, 170 mm |
| Bottom Bracket | Shimano SM-BBMT500 |
| Shifters | Shimano XT |
| Rear Derailleur | Shimano XT |
| Rear Cogs | Shimano SLX, 12-speed, 10-51T |
| Number of Gears | 12 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Shimano MT6120 4-piston with metal pads |
| Brake Levers | Shimano MT6120 |
| Rims | WTB KOM Team i30 TCS 2.0, 28H, tubeless setup |
| Front Hub | Rocky Mountain SL Sealed Boost 15mm |
| Rear Hub | Shimano XT Boost 148mm |
| Wheel Size | XS: 27.5 inches S: 27.5 inches M: 29 inches L: 29 inches XL: 29 inches |
| Tires | Front: Maxxis Minion DHF 2.5 in. WT 3C MaxxTerra EXO+ tubeless-ready; rear: Maxxis Minion DHR II 2.4 in. WT 3CMaxxTerra EXO+ tubeless-ready; tubeless setup, sealant included |
| Tire Width | 2.5 inches 2.4 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | XS: Rocky Mountain AM, 25 mm rise | 9 deg. backsweep, 5 deg. upsweep, 35 mm clamp, 760 mm width S: Rocky Mountain AM, 25 mm rise | 9 deg. backsweep, 5 deg. upsweep, 35 mm clamp, 780 mm width M: Rocky Mountain AM, 25 mm rise | 9 deg. backsweep, 5 deg. upsweep, 35 mm clamp, 780 mm width L: Rocky Mountain AM, 25 mm rise | 9 deg. backsweep, 5 deg. upsweep, 35 mm clamp, 780 mm width XL: Rocky Mountain AM, 25 mm rise | 9 deg. backsweep, 5 deg. upsweep, 35 mm clamp, 780 mm width |
| Stem | Rocky Mountain 35 AM, 5 deg. rise, 40 mm length for all sizes |
| Seat Post | XS: X Fusion Manic Composite 30.9 mm, 125 mm S: X Fusion Manic Composite 30.9 mm, 150 mm M: X Fusion Manic Composite 30.9 mm, 170 mm L: X Fusion Manic Composite 30.9 mm, 200 mm XL: X Fusion Manic Composite 30.9 mm, 200 mm |
| Dropper Post | Yes |
| Saddle | WTB Volt Race 142, chromoly rails |
| Pedals | Not included |
| Headset | FSA ZS56/66 Reach Adjust; 0 mm cups installed, +5 mm and -5 mm cups included |
| Chain | Shimano M6100 |
| Weight | 33 lbs. 5oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
Rocky Mountain Bikes (C01355)
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Height Range | 4'8'' - 5'2'' | 5'1'' - 5'6'' | 5'6 - 5'10'' | 5'9'' - 6'2'' | 6'1'' - 6'2'' |
| Reach | 408 | 433 | 456 | 481 | 511 |
| Stack | 585 | 594 | 619 | 633 | 646 |
| Effective Top Tube | 551 | 578 | 609 | 638 | 671 |
| Seat Tube Center-Top | 355 | 380 | 420 | 445 | 480 |
| Standover Height | 754 | 754 | 798 | 798 | 798 |
| Head Tube Length | 90 | 100 | 95 | 110 | 125 |
| Head Tube Angle (degrees) | 65.3 | 65.3 | 65.1 | 65.1 | 65.1 |
| Seat Tube Angle (degrees) | 76.3 | 76.3 | 76.1 | 76.1 | 76.1 |
| Wheelbase | 1134 | 1164 | 1210 | 1241 | 1277 |
Sizing Notes
Measurements are stated in millimeters unless otherwise indicated.
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
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