Velopedia Bicycle Archive
Compare Bicycles
Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 2011 Rocky Mountain Edge 20 and 2009 Rocky Mountain Edge 20.
- Gearing
2011 Rocky Mountain Edge 20 has a 39% lower climbing ratio than 2009 Rocky Mountain Edge 20.
A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Lowest0.79:1Highest3.00:1Total range382%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 20×1.95; rear size isn’t listed.
Lowest1.29:1Highest2.57:1Total range200%
Speed unavailable: wheel or tire size is missing or unclear.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
Specification
2011 Rocky Mountain Edge 20
2009 Rocky Mountain Edge 20
Overview
Model Year
2011
2009
Brand
Rocky Mountain
Rocky Mountain
Model
Edge 20
Edge 20
Bicycle Type
Juvenile mountain bike, suspension
Juvenile mountain bike, suspension
Colors
Blue/red
Blue
Sizes
11"
12"
Weight
—
—
Frameset
Frame Construction
Aluminum
TIG-welded
Frame Material
6061 aluminum
RMB Custom 6061 aluminum
Fork
Suntour M3010
SR Suntour M2000N, 50mm travel
Fork Material
Aluminum
Single
Drivetrain
Component Group
Mountain Mix
Shimano mix
Shifters
Shimano Revo twist
Shimano Revo twist
Front Derailleur
Shimano FD-M190
—
Rear Derailleur
Shimano Altus
Shimano TZ-40
Crankset
CWI Alloy, 42/32/22t teeth
CWI Alloy, 36 teeth
Bottom Bracket
VP BC55P Cartridge
TH BB-7420
Cassette
Shimano Tourney
Shimano HG22
Rear Cogs
6-speed, 14 - 28 teeth
6-speed, 14 - 28 teeth
Chain
KMC Z-50
KMC Z50
Pedals
VP 570
VP 560 resin
Brakes
Brakes
ProMax TX-122 Alloy V-Brake brakes, Shimano EF51 levers
ProMax TX-122 Alloy V-Brake brakes, Tektro TS325AP levers
Cockpit & Contact Points
Headset
Cane Creek A88
1 1/8" FSA TH-888
Handlebar
RMB XC
Alloy Riser
Handlebar Extensions
Not included
Not included
Stem
RMB XC7
Alloy 31.8
Saddle
RMB Jr.
RMB Jr.
Seatpost
RMB, 27.2mm diameter
Alloy, 27.2mm diameter
Wheels & Tires
Hubs
RMB Alloy Disc w/QR
Alloy
Rims
Alex Z-1000
Alex Z-1000
Spokes
Upc
Ucp
Front Tire
20 x 1.95" Kenda MTB
20" Kenda
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.