
Velopedia Bicycle Archive
2006 Iron Horse Yakuza Kumicho
Original manufacturer specifications including Mountain mix drivetrain, 26" wheels.
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What Velopedia knows
- Model year
- 2006
- Category
- Mountain
- Sizes
- 16", 17", 19"
- Colors
- Pearl Blue
- Record coverage
- 29 preserved details
- Archive ID
- 11057
Model history 1 other year
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Aluminum |
| Fork | Marzocchi Super T, 170mm travel |
| Fork Material | Aluminum |
| Rear Shock | Manitou Swinger 4-Way Coil, 8" travel |
Drivetrain
| Component Group | Mountain mix |
|---|---|
| Shifters | SRAM X.7 Trigger |
| Front Derailleur | E Thirteen LG1 |
| Rear Derailleur | SRAM X.7 Mid Cage |
| Crankset | Truvativ Hussefelt, 38 teeth |
| Bottom Bracket | Truvativ Howitzer |
| Rear Cogs | 9-speed, 11 - 32 teeth |
| Chain | Shimano CN-HG73, 1/2 x 3/32" |
| Pedals | Wellgo Alloy Platform |
Brakes
| Brakes | Hayes HFX-9 Hd Disc Brake W/ V8 Rotor brakes, Hayes HFX-9-HD levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/2" threadless FSA |
|---|---|
| Handlebar | Truvativ Hussefelt |
| Handlebar Extensions | Not included |
| Stem | Truvativ Hussefelt, 31.8mm |
| Saddle | SDG Bel Air ST I-Beam |
| Seatpost | SDG 6061 I-Beam |
Wheels & Tires
| Hubs | Front: aluminum disc, 20mm axle, Rear: aluminum disc, thru-axle |
|---|---|
| Rims | WTB Speed Disc Pro DH, 36-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Front Tire | Front: 26 x 2.70" WTB Timberwolf DH, Rear: 26 x 2.50" WTB Timberwolf DH |
| Wheel Size | 26" wheels |
Parts & serviceability
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Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesBoth brakes should stop firmly and release without rubbing. Inspect pad thickness, rotor wear and alignment, and check the cables or hoses for damage.Inspect the brakes →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 9-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 22 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2006 Iron Horse Yakuza Kumicho · Mountain bike, front & rear suspension · Published sizes: 16", 17", 19"
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Marzocchi Super T, 170mm travel · Aluminum
Suspension
Evaluate the suspension →Archived: Fork: Marzocchi Super T, 170mm travel · Rear shock: Manitou Swinger 4-Way Coil, 8" travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain mix · Shifters: SRAM X.7 Trigger · Front derailleur: E Thirteen LG1 · Rear derailleur: SRAM X.7 Mid Cage · Crankset: Truvativ Hussefelt, 38 teeth · Bottom bracket: Truvativ Howitzer · Rear cogs: 9-speed, 11 - 32 teeth · Chain: Shimano CN-HG73, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Hayes HFX-9 Hd Disc Brake W/ V8 Rotor brakes, Hayes HFX-9-HD levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: WTB Speed Disc Pro DH, 36-hole · Hubs: Front: aluminum disc, 20mm axle, Rear: aluminum disc, thru-axle · Front tire: Front: 26 x 2.70" WTB Timberwolf DH, Rear: 26 x 2.50" WTB Timberwolf DH
Controls and contact points
Archived: Headset: 1 1/2" threadless FSA · Handlebar: Truvativ Hussefelt · Stem: Truvativ Hussefelt, 31.8mm · Seatpost: SDG 6061 I-Beam · Saddle: SDG Bel Air ST I-Beam · Pedals: Wellgo Alloy Platform
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.