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.
- Data limitation
No geometry is recorded for 2010 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%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×32; rear size isn’t listed.
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
2010 GT Tachyon 2.0
2011 GT Tachyon 2.0
Overview
Model Year
2010
2011
Brand
GT
GT
Model
Tachyon 2.0
Tachyon 2.0
Bicycle Type
Road/sport
Road race & triathlon
Original MSRP
$899.99
Not documented
Colors
Blue, White
Pearl black, Royal Blue, Satin Black
Sizes
XXS, XS, X, M, L, XL, XXL
XS, S, M, L, XL, XXL
Weight
—
—
Frameset
Frame Construction
TIG-welded
Aluminum
Frame Material
Aluminum w/ hydroformed TT and DT
Aluminum
Fork
GT Tachyon rigid w/ hydroformed alloy legs
GT Type R Carbon
Fork Material
Alloy
Carbon
Drivetrain
Component Group
Flat Bar Road Mix
Road Mix
Shifters
Shimano SL-R441
Shimano SL-R441
Front Derailleur
Shimano R453, clamp on
Shimano R453
Rear Derailleur
Shimano Sora R-3400
Shimano Sora
Crankset
FSA Omega Triple, 30/39/50 teeth
FSA Omega Triple, 50/39/30t teeth
Bottom Bracket
FSA Mega EXO
Mega EXO
Cassette
Shimano HG50
Shimano HG50
Rear Cogs
9-speed, 11 - 25 teeth
9-speed, 11 - 25 teeth
Chain
KMC HG40
KMC HG40
Pedals
Alloy body, steel cage trekking
—
Brakes
Brakes
Tektro RX 1.0 brakes, Tektro RX-1 levers
Tektro RX-1 brakes, Tektro RX-1 levers
Cockpit & Contact Points
Headset
1 1/8" integrated Sealed Bearing
Integrated Sealed
Handlebar
Ritchey OE Flatbar 31.8 clamp
GT Type R double butted flat bar
Handlebar Extensions
Not included
Not included
Stem
NVO adjustable
NVO adjustable
Saddle
WTB Devo Comp
GT Type R race
Seatpost
GT Design Alloy
GT Design Alloy
Wheels & Tires
Hubs
Front: Alloy With Quick Release, Rear: Shimano Tiagra R440
Formula alloy
Rims
Alex DA22, 32-hole
Jalco DRX3000, 32-hole
Spokes
Stainless, 14ga. (2.0mm)
Stainless, 14ga. (2.0mm)
Spoke Nipples
Chrome Plated Brass
Alloy
Front Tire
700 x 32c Kenda Kiniption
700 x 32c Kenda Kiniption
Wheel Size
700c wheels
700c wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.