Rocky Mountain RC 70 Performance

2018 UrbanFitness

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 10 34–50t / 11–34t
Gear range: 455%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

19 of 23 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

Rocky Mountain Butted 6061 SL Series Alloy. Tapered Headtube. Internal Cable Routing. Rack and Fender Mounts Not identified

Suspension

1 part

Fork
- Rocky Mountain

Drivetrain

7 parts

Bottom bracket
- FSA
Cassette
- Shimano CS-HG500 10 speeds
CS-HG500HG-500
Chain
- KMC X10 10 speeds
Crankset
- FSA Omega 50/34t
Front derailleur
- Shimano Tiagra FD-4700 2 speeds
FD-4700
Rear derailleur
- Shimano Tiagra RD-4700 10 speeds
RD-4700
Shifters
- Shimano Tiagra SL-4700 2 speeds
SL-4700

Brakes

2 parts

Brake levers
- Shimano BL-M396
BL-M396
Brakes
- Shimano BL-M396
BL-M396

Wheels and tires

5 parts

Cockpit and contact points

7 parts

Grips
- Rocky Mountain
Handlebar
- Rocky Mountain
Headset

Threadless Integrated Not identified
Pedals

FPD Steel Cage Not identified
Saddle
- WTB Volt
Seatpost
- Rocky Mountain
Stem
- Rocky Mountain

Sizes and geometry

6 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

Table

Reach 400mm

Stack 575mm

Wheelbase 1045mm

Head angle 71.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	379	394	400	408	422	—
Stackmm	527	543	575	609	630	—
Top tube lengthmm	530	555	570	595	615	—
Seat tube lengthmm	380	430	480	535	560	—
Head tube lengthmm	115	130	160	195	215	—
Head tube angle	70°	70.5°	71°	72°	72.5°	—
Seat tube angle	74°	73.5°	73.5°	73°	73°	—
Chainstay lengthmm	435	435	435	435	435	—
Wheelbasemm	1017	1034	1045	1061	1076	—
Front centermm	592	609	620	635	650	—
Bottom bracket dropmm	70	70	70	69	69	—
Fork rakemm	40	41	40	46	45	—
Trailmm	84	80	78	65	63	—
Stack/reach ratio	1.39	1.38	1.44	1.49	1.49	—

Not published by the manufacturer: Bottom bracket height, Standover height, 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
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 28c
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

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

Lowest gear

29.0 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2018
Sample: 166 bicycles with this information
Coverage: 87.3% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2018
Sample: 166 bicycles with this information
Coverage: 87.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 km/h

Total gear range 455%

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: 29.0–131.8 gear inches
Class reference (p10–p90): 22.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2018
Lowest gear: 166 bicycles with this information, 87.3% of the class
Highest gear: 166 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 2018 builds

Differences across 2018 builds
Specification	This bicycle Rocky Mountain RC 70 Performance	Rocky Mountain RC 10 Comfort	Rocky Mountain RC 10 Comfort Lo	Rocky Mountain RC 10 Performance	Rocky Mountain RC 30 Comfort	Rocky Mountain RC 30 Performance
Frame
Intended fit	Unisex	Unisex	womens	Unisex	Unisex	Unisex
Fork material	Carbon	Steel	Steel	Steel	Aluminum	Aluminum
Drivetrain
Front chainrings	2	3	3	3	3	3
Smallest chainring	34	28	28	28	26	26
Largest chainring	50	48	48	48	48	48
Rear sprockets	10	Not informed	Not informed	Not informed	9	9
Smallest sprocket	11	12	12	12	11	11
Largest sprocket	34	32	32	32	34	34
Lowest gear	29.0 in	25.4 in	25.4 in	25.4 in	22.2 in	22.2 in
Highest gear	131.8 in	116.0 in	116.0 in	116.0 in	126.6 in	126.6 in
Brakes
Brake type	Hydraulic disc	Rim brake	Rim brake	Rim brake	Rim brake	Mechanical disc
Cockpit
Seatpost	Rigid seatpost	suspension	suspension	Rigid seatpost	suspension	Rigid seatpost
Other specifications
Tire width	28c	35c	35c	28c	35c	28c