Rocky Mountain Altitude Carbon 99

2021 MountainEnduro

Last known price: $10,449

Prices shown first for United States
Travel: 170 / 160 mm Fork / rear shock
Wheels: 27.5″, 29″
Drivetrain: 1 × 12 34t / 10–52t
Gear range: 520%
Weight: 13.44 kg 29.6 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

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

The manufacturer did not publish rider heights for these sizes.

Components

19 of 20 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

SMOOTHWALL™ Carbon. Full Sealed Cartridge Bearings. Press Fit BB92. Internal Cable Routing. 2-Bolt ISCG05 Tabs. RIDE-9™ Adjustable Geometry. 2 Position Axle. 160mm Travel. SMOOTHWALL™ Carbon Rear Triangle Not identified

RIDE-9

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- SRAM
Cassette
- SRAM XG-1295 Eagle 12 speeds 10–52t
XG-1295
Chain
- SRAM XX1 Eagle 12 speeds
Crankset
- SRAM X01 Eagle 11 speeds 34t
Rear derailleur
- SRAM X01 Eagle AXS 12 speeds
Shifters
- SRAM

Brakes

1 part

Brakes
- SRAM

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Sizes and geometry

10 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 Steep

Table

Reach 461mm

Stack 616mm

Wheelbase 1216mm

Head angle 65.5°

Seat angle 76.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 10 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	437	423	461	449	461	449	486	474	516	504
Stackmm	591	601	601	610	616	624	629	638	643	652
Top tube lengthmm	577	580	605	607	608	611	637	640	670	673
Seat tube lengthmm	380	380	420	420	420	420	445	445	480	480
Head tube lengthmm	100	100	110	110	95	95	110	110	125	125
Head tube angle	65.5°	64.4°	65.5°	64.4°	65.5°	64.4°	65.5°	64.4°	65.5°	64.4°
Seat tube angle	76.5°	75.4°	76.5°	75.4°	76.5°	75.4°	76.5°	75.4°	76.5°	75.4°
Chainstay lengthmm	425	428	426	428	436	438	436	438	436	438
Wheelbasemm	1169	1172	1198	1201	1216	1218	1248	1249	1284	1285
Front centermm	744	745	772	774	781	782	813	813	849	849
Bottom bracket dropmm	4	20	5	19	19	34	19	34	19	34
Bottom bracket heightmm	351	335	350	336	355	340	355	340	355	340
Standover heightmm	774	767	812	797	819	813	819	813	819	813
Fork rakemm	36	39	36	37	43	45	44	44	44	43
Trailmm	122	127	122	129	123	130	122	131	122	132
Stack/reach ratio	1.35	1.42	1.30	1.36	1.34	1.39	1.29	1.35	1.25	1.29

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: Carbon
Bicycle weight: 13.44 kg

29.6 lb

Suspension

Suspension configuration: Full suspension
Front travel: 170 mm
Rear travel: 160 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 19.0 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BB86/BB92
Fork spring: Air
Tire width: 2.5″
Wheel material: Carbon
Wheel size: 27.5″, 29″

Technical analysis

5 measures

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

Front travel

170 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 1,011 bicycles with this information
Coverage: 99.0% of the class

Rear travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 839 bicycles with this information
Coverage: 82.1% of the class

Lowest gear

19.0 gear inches

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Highest gear

98.6 gear inches

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Shifting

Electronic

65 of 1,021 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2021
Sample: 1,021 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.3 km/h
Highest gear: 37.8 km/h

Total gear range 520%

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: 19.0–98.6 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2021
Lowest gear: 892 bicycles with this information, 87.3% of the class
Highest gear: 892 bicycles with this information, 87.3% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle Rocky Mountain Altitude Carbon 99	Rocky Mountain Altitude Alloy 30	Rocky Mountain Altitude Alloy 50	Rocky Mountain Altitude Alloy 70	Rocky Mountain Altitude Carbon 50	Rocky Mountain Altitude Carbon 70
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	13.44 kg	16 kg	15.71 kg	16.13 kg	14.33 kg	14.5 kg
Drivetrain
Rear sprockets	12	12	12	Not informed	Not informed	Not informed
Largest sprocket	52	51	51	51	51	51
Lowest gear	19.0 in	19.3 in	19.3 in	19.3 in	19.3 in	19.3 in
Cockpit
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Bottom bracket standard	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BSA
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum