
Velopedia Bicycle Archive
2004 Iron Horse SGS-Pro DH
Original specifications: Mountain Mix drivetrain · 26" wheels · geometry for 1 published size.
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At a glance
- Model year
- 2004
- Category
- Mountain
- Original MSRP
- $2,499.99
- Sizes
- 17", 19", 21"
- Colors
- Matte Silver
- Geometry
- Legacy reference · Geometry context
- In this record
- 29 specifications · archived image · original MSRP · geometry
- Archive ID
- 31865
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Aluminum, butted |
| Fork | Rock Shox Boxxer Race, 7.0" travel |
| Rear Shock | Answer Manitou SPV Coil 4-way, 8" travel |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano Deore RapidFire |
| Front Derailleur | N/A |
| Rear Derailleur | Shimano Deore XT |
| Crankset | FSA V-drive Xtreme 165mm, 38 teeth |
| Bottom Bracket | FSA Platinum Pro DH, 100mm spindle |
| Rear Cogs | 9-speed, 11 - 32 teeth |
| Chain | Shimano HG-73, 1/2 x 3/32" |
| Pedals | Wellgo B37 Platform |
Brakes
| Brakes | Hayes HFX-9 Hydraulic Disc brakes, Hayes HFX-9 HD levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/2" FSA No.61 w/1 1/8" reducer |
|---|---|
| Handlebar | FSA Riser bar |
| Handlebar Extensions | N/A |
| Stem | FSA 3D forged |
| Saddle | WTB Speed V Race |
| Seatpost | Micro adjust, 29.8mm diameter |
Wheels & Tires
| Hubs | Front: Alloy 20mm thru axle, Rear: Alloy 12mm thru axle |
|---|---|
| Rims | WTB SpeedDisc Pro DH, 36-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) Black straight gauge |
| Front Tire | 26 x 2.5" Maxxis Minion |
| Wheel Size | 26" wheels |
Historical reference geometry
Geometry
This historical geometry describes the model, but the original source does not identify its frame size. Use it as a period reference, not a size-specific fit comparison.
| Measurement | Legacy reference |
|---|---|
| Head-tube angle | 66.5° |
| Seat-tube angle | 65° |
| Chainstay / rear center | 440.9 mm |
Geometry source: Historical archive database — model-level reference geometry. The historical source provides one model-level geometry set and does not identify the corresponding frame size.
Geometry tools
Explore this historical geometry
Model-level historical reference
Period context: At 66.5°, the head angle sits toward the slacker end among mountain geometries represented in Velopedia for this period. Its 65° seat angle is toward the more relaxed end among the same-period mountain references.
Compared with 414 distinct legacy mountain geometries from model years 2002–2006. Only angular measurements are used because the historical reference frame size is unidentified.Parts & serviceability
Find replacement parts
More qualified parts (6)
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
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 levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.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: 2004 Iron Horse SGS-Pro DH · Mountain bike, front & rear suspension · Published sizes: 17", 19", 21"
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Rock Shox Boxxer Race, 7.0" travel
Suspension
Evaluate the suspension →Archived: Fork: Rock Shox Boxxer Race, 7.0" travel · Rear shock: Answer Manitou SPV Coil 4-way, 8" travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano Deore RapidFire · Rear derailleur: Shimano Deore XT · Crankset: FSA V-drive Xtreme 165mm, 38 teeth · Bottom bracket: FSA Platinum Pro DH, 100mm spindle · Rear cogs: 9-speed, 11 - 32 teeth · Chain: Shimano HG-73, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Hayes HFX-9 Hydraulic Disc brakes, Hayes HFX-9 HD levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: WTB SpeedDisc Pro DH, 36-hole · Hubs: Front: Alloy 20mm thru axle, Rear: Alloy 12mm thru axle · Front tire: 26 x 2.5" Maxxis Minion
Controls and contact points
Archived: Headset: 1 1/2" FSA No.61 w/1 1/8" reducer · Handlebar: FSA Riser bar · Stem: FSA 3D forged · Seatpost: Micro adjust, 29.8mm diameter · Saddle: WTB Speed V Race · Pedals: Wellgo B37 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.




