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 2011 GT Tachyon 2.0 and 2010 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
2011 GT Tachyon 2.0
2010 GT Tachyon 2.0
Overview
Model Year
2011
2010
Brand
GT
GT
Model
Tachyon 2.0
Tachyon 2.0
Bicycle Type
Road race & triathlon
Road/sport
Original MSRP
Not documented
$899.99
Colors
Pearl black, Royal Blue, Satin Black
Blue, White
Sizes
XS, S, M, L, XL, XXL
XXS, XS, X, M, L, XL, XXL
Weight
—
—
Frameset
Frame Construction
Aluminum
TIG-welded
Frame Material
Aluminum
Aluminum w/ hydroformed TT and DT
Fork
GT Type R Carbon
GT Tachyon rigid w/ hydroformed alloy legs
Fork Material
Carbon
Alloy
Drivetrain
Component Group
Road Mix
Flat Bar Road Mix
Shifters
Shimano SL-R441
Shimano SL-R441
Front Derailleur
Shimano R453
Shimano R453, clamp on
Rear Derailleur
Shimano Sora
Shimano Sora R-3400
Crankset
FSA Omega Triple, 50/39/30t teeth
FSA Omega Triple, 30/39/50 teeth
Bottom Bracket
Mega EXO
FSA 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 brakes, Tektro RX-1 levers
Tektro RX 1.0 brakes, Tektro RX-1 levers
Cockpit & Contact Points
Headset
Integrated Sealed
1 1/8" integrated Sealed Bearing
Handlebar
GT Type R double butted flat bar
Ritchey OE Flatbar 31.8 clamp
Handlebar Extensions
Not included
Not included
Stem
NVO adjustable
NVO adjustable
Saddle
GT Type R race
WTB Devo Comp
Seatpost
GT Design Alloy
GT Design Alloy
Wheels & Tires
Hubs
Formula alloy
Front: Alloy With Quick Release, Rear: Shimano Tiagra R440
Rims
Jalco DRX3000, 32-hole
Alex DA22, 32-hole
Spokes
Stainless, 14ga. (2.0mm)
Stainless, 14ga. (2.0mm)
Spoke Nipples
Alloy
Chrome Plated Brass
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.