Lowest0.86:1
Highest3.82:1
Total range445%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 26×1.95; rear size isn’t listed.
Velopedia Bicycle Archive
1998 Wheeler 3900ZX
Original specifications: Shimano STX · 7-speed · mechanical rear derailleur · 26" wheels · legacy reference geometry.
Planning to sell? Draft your listing
No archive photo is available for this record.
At a glance
Archive #71840- Model year
- 1998
- Category
- Mountain
- Original MSRP
- $529.00
- Sizes
- 16", 18", 19.5", 21"
- Colors
- Bombastic
- Geometry
- Legacy reference
- In this record
- 25 specifications · original MSRP · geometry
Original build7005 aluminum · Mountain Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 7005 aluminum |
| Fork | Marzocchi Zokes Pro |
| Fork Material | Aluminum, triple-clamp crown |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano STX-RC RapidFire SL |
| Front Derailleur | Shimano Alivio top-swing, top-pull |
| Rear Derailleur | Shimano STX |
| Crankset | Shimano Alivio, 24/34/42 teeth |
| Rear Cogs | 7-speed, 11 - 28 teeth |
| Chain | 1/2 x 3/32" |
| Pedals | Aluminum |
Brakes
| Brakes | Shimano STX-RC M-System brakes, Shimano STX-RC levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Aheadset |
|---|---|
| Handlebar | Aluminum |
| Handlebar Extensions | Not included |
| Stem | HOT Components aluminum |
| Saddle | Wheeler |
| Seatpost | Alutrax aluminum |
Wheels & Tires
| Hubs | Front: Shimano Altus, Rear: Shimano Alivio |
|---|---|
| Rims | Aluminum, 36-hole |
| Spokes | Stainless steel, 2.0mm straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 1.95" IRC Mythos XC |
| Wheel Size | 26" wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Size
Measurement
Measurement
—
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 6 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 558 mm |
| Head-tube angle | 70.5° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 425 mm |
| Wheelbase | 1063 mm |
| Fork offset / rake | 40.6 mm |
Frame size not recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
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 your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| 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
1/2 x 3/32"
Replacement search: 7-speed bicycle chain Before ordering: Check chain width and length.
26 x 1.95" IRC Mythos XC
Shimano Alivio
24/34/42 teeth
More parts (3)Fewer parts
Shimano Alivio top-swing
top-pull
Shimano STX
Shimano STX-RC RapidFire SL
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 26 x 1.95" IRC Mythos XC
- Drivetrain
- 7-speed
Equipment inspection checks 11 checks based on 6 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: TIG-welded · Fork: Marzocchi Zokes Pro · Aluminum, triple-clamp crown
Suspension
Evaluate the suspension →Archived: Fork: Marzocchi Zokes Pro
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano STX-RC RapidFire SL · Front derailleur: Shimano Alivio top-swing, top-pull · Rear derailleur: Shimano STX · Crankset: Shimano Alivio, 24/34/42 teeth · Rear cogs: 7-speed, 11 - 28 teeth · Chain: 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano STX-RC M-System brakes, Shimano STX-RC levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Aluminum, 36-hole · Hubs: Front: Shimano Altus, Rear: Shimano Alivio · Front tire: 26 x 1.95" IRC Mythos XC
Controls and contact points
Archived: Headset: 1 1/8" threadless Aheadset · Handlebar: Aluminum · Stem: HOT Components aluminum · Seatpost: Alutrax aluminum · Saddle: Wheeler · Pedals: Aluminum
Have you owned this model?Help preserve its real-world history by sharing your owner experience.
Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.
Already contributed? Send me a fresh private edit link
For privacy, Velopedia shows the same confirmation whether or not an experience exists.
Checking current listings…
Find this bike on eBay
Search eBay US; check the model year, size and installed components. We may earn a commission from purchases.
- Frame
- Chromoly/hi-tensile steel
- Groupset
- Mountain Mix
Same brand and year
1800
- Frame
- 4130 chromoly
- Groupset
- Mountain Mix
Same brand and year
2800ZX
Same category and period
Trek 9900
- Frame
- Easton ProGram Elite double-butted
- Groupset
- Shimano XTR
Same category and period
Yeti A.R.C. XTR
Same category and period
Barracuda A2B
Same category and period
Barracuda A2BS
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.