Velopedia Bicycle Archive
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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.
- Identity & price
These bicycles are categorized differently: 2012 GT Tachyon 2.0 is Hybrid; 2011 GT Tachyon 2.0 is Road.
- Data limitation
No geometry is recorded for 2012 GT Tachyon 2.0 and 2011 GT Tachyon 2.0.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Lowest1.20:1Highest4.55:1Total range379%
Speed unavailable: wheel or tire size is missing or unclear.
Lowest1.20:1Highest4.55:1Total range379%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×32; rear size isn’t listed.
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
2012 GT Tachyon 2.0
2011 GT Tachyon 2.0
Overview
Model Year
2012
2011
Brand
GT
GT
Model
Tachyon 2.0
Tachyon 2.0
Bicycle Type
Hybrid/Comfort
Road race & triathlon
Colors
White
Pearl black, Royal Blue, Satin Black
Sizes
S, M, L, XL
XS, S, M, L, XL, XXL
Weight
—
—
Frameset
Frame Construction
—
Aluminum
Frame Material
Hydroformed Butted 6061 Al
Aluminum
Fork
GT Type R w/ FOC Carbon
GT Type R Carbon
Fork Material
—
Carbon
Drivetrain
Component Group
—
Road Mix
Shifters
Shimano R440 9spd trigger
Shimano SL-R441
Front Derailleur
Shimano R-453
Shimano R453
Rear Derailleur
Shimano Sora 9spd
Shimano Sora
Crankset
FSA Omega 50/39/30t
FSA Omega Triple, 50/39/30t teeth
Bottom Bracket
Shimano
Mega EXO
Cassette
Shimano HG-51 9spd 11-25t
Shimano HG50
Rear Cogs
—
9-speed, 11 - 25 teeth
Chain
KMC HG-53
KMC HG40
Pedals
GT Trekking
—
Brakes
Brakes
Tektro RX 1.0
Tektro RX-1 brakes, Tektro RX-1 levers
Cockpit & Contact Points
Headset
Fsa
Integrated Sealed
Handlebar
GT Type R Flat-Riser
GT Type R double butted flat bar
Handlebar Extensions
—
Not included
Stem
GT 3D Forged 6061
NVO adjustable
Saddle
GTw Bio-Morphic
GT Type R race
Seatpost
GT 2 bolt Alloy Road
GT Design Alloy
Wheels & Tires
Hubs
Formula Sealed Formula Sealed
Formula alloy
Rims
—
Jalco DRX3000, 32-hole
Spokes
—
Stainless, 14ga. (2.0mm)
Spoke Nipples
—
Alloy
Front Tire
Kenda Kwest 700x32
700 x 32c Kenda Kiniption
Wheel Size
—
700c wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.