Velopedia Bicycle Archive

2013 GT Avalanche 4.0 Mech

Original specifications.

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At a glance

Archive #9225570

Model year: 2013
Category: Mountain
Sizes: XS, S, M, L, XL, XXL
Colors: Black, Blue, White
In this record: 18 specifications · 3 archived images

Original buildAluminum

Manufacturer catalog

Published sizes and colors

6 sizes · 3 colors

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

Published sizes

XSSMLXLXXL

Published colors

BlackBlueWhite

Frameset

Frame Material	Aluminum
Fork	SR Suntour XCT V4 100mm

Drivetrain

Shifters	Shimano Acera
Front Derailleur	Shimano Altus
Rear Derailleur	Shimano Alivio
Crankset	SR Suntour NEX 42/34/24t
Bottom Bracket	Tange sealed
Cassette	Shimano HG31 11x32t
Rear Cogs	3x8 Speeds
Chain	KMC Z99
Pedals	GT Slim Line Flat

Brakes

Brakes	Tektro Novela

Cockpit & Contact Points

Headset	1 1/8" Threadless
Handlebar	Alloy Riser Bar
Stem	Alloy
Saddle	All Terra Tacoma
Seatpost	Alloy

Wheels & Tires

Front Tire	Maxxis Sphinx 26x2.1

Gearing

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

All published sizes42/34/24T · 11–32T

Lowest0.75:1 Highest3.82:1 Total range509%

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.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

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

Rear tire

Rear tire marking

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).

Rim diameter (BSD, mm) Tire width (mm)

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.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

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

Parts & serviceability

Find replacement parts

Original specifications

Chain · Original

KMC Z99

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Retailer offers

SRAM PC-830 Chain One Color, 8 Speed

Replacement option

Competitive Cyclist ↗$11.00

Cassette · Original

Shimano HG31 11x32t

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Front tire · Original

Maxxis Sphinx 26x2.1

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More parts (3)Fewer parts

Front derailleur · Original

Shimano Altus

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Rear derailleur · Original

Shimano Alivio

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Shifters · Original

Shimano Acera

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Parts and service referenceQuick reference before buying parts

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

Front tire: Maxxis Sphinx 26x2.1
Bottom bracket / shell: Tange sealed

Equipment inspection checks 9 checks based on 5 archived component groups Open equipment checksClose equipment checks

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 →

Frame and fork

Inspect the frame and fork →

Archived: Frame: Aluminum · Fork: SR Suntour XCT V4 100mm

Look for dents or shape changes and inspect the edges of welds around the head tube, bottom bracket, seat cluster and suspension mounts for hairline cracks.

Suspension

Evaluate the suspension →

Archived: Fork: SR Suntour XCT V4 100mm

Inspect the fork stanchions for scratches or coating wear, look for oil or dirt rings at the seals, and cycle the fork through its travel while checking for binding or bushing play.
Ask for dated fork-service records. A clean exterior does not establish the condition of internal seals, oil or bushings.

Drivetrain

Check drivetrain wear →

Archived: Shifters: Shimano Acera · Front derailleur: Shimano Altus · Rear derailleur: Shimano Alivio · Crankset: SR Suntour NEX 42/34/24t · Bottom bracket: Tange sealed · Cassette: Shimano HG31 11x32t · Rear cogs: 3x8 Speeds · Chain: KMC Z99

Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Brakes

Inspect the brakes →

Archived: Brakes: Tektro Novela

Inspect pads and braking surfaces, check the complete cable or hose path, and confirm both controls feel consistent and return cleanly.

Controls and contact points

Archived: Headset: 1 1/8" Threadless · Handlebar: Alloy Riser Bar · Stem: Alloy · Seatpost: Alloy · Saddle: All Terra Tacoma · Pedals: GT Slim Line Flat

Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
Check that the seatpost moves for adjustment and that the saddle, post and clamp hold securely without cracks, severe corrosion or damaged hardware.

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Gallery3 images

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

2013 GT Avalanche 4.0 Mech