Rocky Mountain Instinct Alloy 50

2018 MountainTrail

Last known price: $3,199

Prices shown first for United States
Travel: 140 / 140 mm Fork / rear shock
Wheels: 29″, 27.5″
Drivetrain: 1 × 11 30t / 11–42t
Gear range: 382%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

SM Steep
SM Steep
SM Slack
SM Slack
MD Steep
MD Steep
MD Slack
MD Slack
LG Steep
LG Steep
LG Slack
LG Slack
XL Steep
XL Steep
XL Slack
XL Slack

The manufacturer did not publish rider heights for these sizes.

Components

20 of 22 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

FORM™ Alloy. Full Sealed Cartridge Bearings. Press Fit BB. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry + Suspension Rate Not identified

RIDE-9

Suspension

2 parts

Drivetrain

7 parts

Brakes

1 part

Brakes
- SRAM Level T

Wheels and tires

5 parts

Front hub
- Rocky Mountain
Rear hub
- SRAM
Rims

Sun Düroc 30 Tubeless Compatible - Tape | Valves | Sealant Not Incl Not identified
Spokes
- WTB
Tires
- Maxxis Minion

Cockpit and contact points

6 parts

Sizes and geometry

16 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size MD Slack

Table

Reach 427mm

Stack 615mm

Wheelbase 1183mm

Head angle 65.6°

Seat angle 74.1°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 16 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	419	414	408	403	443	438	432	427	465	461	455	450	493	488	482	477
Stackmm	599	602	607	610	604	607	611	615	613	616	621	624	622	625	630	633
Top tube lengthmm	574	575	576	578	599	600	601	603	624	625	626	628	654	655	656	658
Seat tube lengthmm	392	392	392	392	432	432	432	432	470	470	470	470	508	508	508	508
Head tube lengthmm	95	95	95	95	100	100	100	100	110	110	110	110	120	120	120	120
Head tube angle	67°	66.6°	66°	65.5°	67°	66.6°	66°	65.6°	67°	66.6°	66°	65.6°	67°	66.6°	66°	65.6°
Seat tube angle	75.5°	75.1°	74.5°	74°	75.5°	75.1°	74.5°	74.1°	75.5°	75.1°	74.5°	74.1°	75.5°	75.1°	74.5°	74.1°
Chainstay lengthmm	434	434	436	436	434	434	436	436	434	434	436	436	434	434	436	436
Wheelbasemm	1153	1157	1154	1158	1178	1182	1179	1183	1205	1209	1206	1210	1236	1240	1237	1242
Front centermm	720	724	720	724	745	749	745	749	772	776	772	776	803	807	803	808
Bottom bracket dropmm	23	20	36	33	23	20	36	33	23	20	37	33	23	20	37	33
Bottom bracket heightmm	351	335	338	322	351	335	338	322	351	335	337	322	351	335	337	322
Standover heightmm	815	811	810	806	815	811	810	806	815	811	810	806	815	811	810	806
Fork rakemm	52	53	52	52	51	52	52	52	52	52	52	52	51	52	52	53
Trailmm	102	96	110	105	104	97	110	104	102	97	110	104	104	97	110	103
Stack/reach ratio	1.43	1.45	1.49	1.51	1.36	1.39	1.41	1.44	1.32	1.34	1.37	1.39	1.26	1.28	1.31	1.33

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 19.6 in
Highest gear: 75.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Fork spring: Air
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 29″, 27.5″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2018
Sample: 916 bicycles with this information
Coverage: 98.6% of the class

Lowest gear

19.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2018
Sample: 836 bicycles with this information
Coverage: 89.9% of the class

Highest gear

75.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2018
Sample: 836 bicycles with this information
Coverage: 89.9% of the class

Shifting

Mechanical

25 of 929 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2018
Sample: 929 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.5 km/h
Highest gear: 28.7 km/h

Total gear range 382%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 19.6–75.0 gear inches
Class reference (p10–p90): 16.5–93.5 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2018
Lowest gear: 836 bicycles with this information, 89.9% of the class
Highest gear: 836 bicycles with this information, 89.9% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2018 builds

Differences across 2018 builds
Specification	This bicycle Rocky Mountain Instinct Alloy 50	Rocky Mountain Instinct Alloy 70	Rocky Mountain Instinct Carbon 30	Rocky Mountain Instinct Carbon 50	Rocky Mountain Instinct Carbon 70	Rocky Mountain Instinct Carbon 90 BC Edition
Frame
Frame material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Carbon
Suspension
Front travel	140 mm	140 mm	140 mm	140 mm	140 mm	160 mm
Rear travel	140 mm	140 mm	140 mm	140 mm	140 mm	155 mm
Drivetrain
Smallest chainring	30	32	30	32	32	32
Largest chainring	30	32	30	32	32	32
Rear sprockets	11	12	11	12	12	12
Smallest sprocket	11	10	11	10	10	10
Largest sprocket	42	50	42	50	50	50
Lowest gear	19.6 in	17.6 in	19.6 in	17.6 in	17.6 in	17.6 in
Highest gear	75.0 in	88.0 in	75.0 in	88.0 in	88.0 in	88.0 in
Other specifications
Tire width	2.3″	2.3″	2.3″	2.3″	2.3″	2.4″