Velopedia Bicycle Archive

2012 GT Tachyon 4.0

Original specifications.

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At a glance

Archive #2023562
Model year
2012
Category
Hybrid
Sizes
S, M, L, XL
Colors
Satin Black, Silver
In this record
18 specifications · 2 archived images
Model history 1 other year

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Identification clues

2012 archived details

Published colors
Satin Black, Silver
Frame
Hydroformed Butted 6061 Al

Clues, not proof of model year. Colors vary and components may have been replaced.

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Original buildHydroformed Butted 6061 Al

Manufacturer catalog

Published sizes and colors

4 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

SMLXL

Published colors

Satin BlackSilver

Frameset

Frame MaterialHydroformed Butted 6061 Al
ForkGT Type R w/ 6061

Drivetrain

ShiftersShimano EF-51 8spd
Front DerailleurShimano M191
Rear DerailleurShimano Acera 8spd
CranksetShimano M311 48/38/28t
Bottom BracketFSA Sealed
CassetteShimano HG-51 8spd 11-32t
ChainKMC HG-40
PedalsGT Trekking

Brakes

BrakesTektro RX 1.0

Cockpit & Contact Points

HeadsetFsa
HandlebarGT Type R Flat-Riser
StemGT 3D Forged 6061
SaddleGTw Bio-Morphic
SeatpostGT 2 bolt Alloy Road

Wheels & Tires

HubsFormula Sealed Formula Sealed
Front TireKenda Kwest 700x32

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

All published sizes48/38/28T · 11–32T · 8-speed
Lowest0.88:1 Highest4.36:1 Total range499%

Speed unavailable: wheel or tire size is missing or unclear.

Add your rear tire size to calculate speed
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.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
KMC HG-40
Retailer offers
Front tire · Original
Kenda Kwest 700x32
Retailer offers

Continental Ultra Sport Iii Road Bike Tire - 700C - (Clincher Wire) Black/Black, 700c x 32mm

700x32c

Replacement option

Other replacement options (1)
Cassette · Original
Shimano HG-51 8spd 11-32t
More parts (2)Fewer parts
Crankset · Original
Shimano M311 48/38/28t
Rear derailleur · Original
Shimano Acera 8spd

Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire
Kenda Kwest 700x32
Drivetrain
8-speed
Bottom bracket / shell
FSA Sealed
Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
0 of 10 checked Progress stays in this browser for this record.

Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.

Full used-bike inspection guide →

Archived: Frame: Hydroformed Butted 6061 Al · Fork: GT Type R w/ 6061

Archived: Shifters: Shimano EF-51 8spd · Front derailleur: Shimano M191 · Rear derailleur: Shimano Acera 8spd · Crankset: Shimano M311 48/38/28t · Bottom bracket: FSA Sealed · Cassette: Shimano HG-51 8spd 11-32t · Chain: KMC HG-40

Archived: Brakes: Tektro RX 1.0

Archived: Hubs: Formula Sealed Formula Sealed · Front tire: Kenda Kwest 700x32

Controls and contact points

Archived: Headset: FSA · Handlebar: GT Type R Flat-Riser · Stem: GT 3D Forged 6061 · Seatpost: GT 2 bolt Alloy Road · Saddle: GTw Bio-Morphic · Pedals: GT Trekking

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Gallery2 images

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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