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2005 Hoffman Bikes Disrupter IL2

Original specifications: 20" wheels.

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At a glance

Archive #93912
Model year
2005
Category
BMX
In this record
21 specifications
Model history 1 other year

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Identification clues

2005 archived details

Frame
Chromoly
Original equipment
N/A

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

Campaign
Original buildChromoly · 20" wheels

Frameset

Frame ConstructionTIG-welded
Frame MaterialChromoly
ForkHoffman Disrupter
Fork Material4130 chromoly, unicrown crown

Drivetrain

Crankset3-piece chromoly, 39 teeth
Bottom BracketSealed cartridge
Rear Cogs1-speed, 14 teeth
ChainKMC Z510H, 1/2 x 1/8"
PedalsWellgo aluminum

Brakes

BrakesDiaTech 996 Hombre U-Brake brakes, Dia-Compe MX99 levers

Cockpit & Contact Points

Headset1 1/8" threadless Dia-Tech D-1 FS
HandlebarHoffman Jumping
StemHoffman Super Stem
SaddleHoffman 8mm
SeatpostChromoly micro-adjust, 25.4mm diameter

Wheels & Tires

HubsFront: aluminum, 14mm axle, Rear: aluminum, 14mm axle L/R drive
RimsJalco double wall, 48-hole
SpokesStainless steel, 14ga. (2.0mm) straight gauge
Spoke NipplesBrass nipples
Front Tire20 x 1.95" Hoffman Skid Mark
Wheel Size20" wheels

Gearing

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

RPM

RPM = pedal turns per minute.

Published build39T · 14T · 1-speed
Ratio2.79:1
Estimated speed At 90 RPM Gear14.8 mph

Uses front tire 20×1.95; 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.

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

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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
Front tire · Original
20 x 1.95" Hoffman Skid Mark Replacement search: 20x1.95 bicycle tire Before ordering: Check rim type and tire clearance.
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Seatpost · Original
Chromoly micro-adjust

25.4mm diameter

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Parts and service referenceQuick reference before buying parts

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

Front tire
20 x 1.95" Hoffman Skid Mark
Drivetrain
1-speed
Seatpost diameter
25.4 mm
Bottom bracket / shell
Sealed cartridge
Campaign
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 →

Frame and fork

Inspect the frame and fork →

Archived: Frame: TIG-welded · Fork: Hoffman Disrupter · 4130 chromoly, unicrown crown

Drivetrain

Check drivetrain wear →

Archived: Crankset: 3-piece chromoly, 39 teeth · Bottom bracket: Sealed cartridge · Rear cogs: 1-speed, 14 teeth · Chain: KMC Z510H, 1/2 x 1/8"

Brakes

Inspect the brakes →

Archived: Brakes: DiaTech 996 Hombre U-Brake brakes, Dia-Compe MX99 levers

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 20" wheels · Rims: Jalco double wall, 48-hole · Hubs: Front: aluminum, 14mm axle, Rear: aluminum, 14mm axle L/R drive · Front tire: 20 x 1.95" Hoffman Skid Mark

Controls and contact points

Archived: Headset: 1 1/8" threadless Dia-Tech D-1 FS · Handlebar: Hoffman Jumping · Stem: Hoffman Super Stem · Seatpost: Chromoly micro-adjust, 25.4mm diameter · Saddle: Hoffman 8mm · Pedals: Wellgo aluminum

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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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