Velopedia Bicycle Archive

2013 Fit Aitken 1

Original specifications.

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At a glance

Archive #9239799

Model year: 2013
Category: BMX
Sizes: 20.5" TT
Colors: Light Gray, Metallic Gold
In this record: 15 specifications · 7 archived images

Original buildChromoly

Manufacturer catalog

Published sizes and colors

1 size · 2 colors

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

Published sizes

20.5" TT

Published colors

Light GrayMetallic Gold

Frameset

Frame Material	Chromoly
Fork	Chromoly

Drivetrain

Crankset	3-Piece 25t
Bottom Bracket	Mid Sealed
Cassette	9t Driver
Rear Cogs	1x1 Speeds
Chain	KMC Z410
Pedals	nylon platform

Brakes

Brakes	Alloy U Brake

Cockpit & Contact Points

Headset	Integrated sealed bearings
Handlebar	2 Piece 8.375" Rise
Stem	FIT Top Load
Saddle	FIT PCP Padded
Seatpost	Pivotal

Wheels & Tires

Front Tire	FIT FAF 20x2.25

Gearing

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

Published build25T · 9T

Ratio2.78:1

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 and service referenceQuick reference before buying parts

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

Front tire: FIT FAF 20x2.25
Bottom bracket / shell: Mid Sealed

Equipment inspection checks 8 checks based on 4 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: Chromoly · Fork: Chromoly

Check paint damage, vent holes and accessible internal surfaces for corrosion. Look for dents, bent tubes and cracking around welded or brazed joints.
Inspect the fork crown, blades, dropouts and visible steerer area. Check that it is straight, securely installed and free of cracks or impact damage.

Drivetrain

Check drivetrain wear →

Archived: Crankset: 3-Piece 25t · Bottom bracket: Mid Sealed · Cassette: 9t Driver · Rear cogs: 1x1 Speeds · Chain: KMC Z410

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: Alloy U Brake

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: Integrated sealed bearings · Handlebar: 2 Piece 8.375" Rise · Stem: FIT Top Load · Seatpost: Pivotal · Saddle: FIT PCP Padded · Pedals: nylon platform

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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Gallery7 images