Uses front tire 26×1.95; rear size isn’t listed.
Velopedia Bicycle Archive
1998 Rocky Mountain Thin Air
Original specifications: Grip Shift ESP 9.0SL/Shimano Deore XT drivetrain · 26" wheels · 24.4 lb published weight.
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At a glance
Archive #78477- Model year
- 1998
- Category
- Mountain
- Original MSRP
- $1,939.00
- Sizes
- 16", 17.5", 18.5", 19.5", 21"
- Colors
- Red
- Weight
- 24.4 lb
- Geometry
- Legacy reference
- In this record
- 25 specifications · archived image · original MSRP · geometry
Model history 5 other years
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Identification clues
1998 archived details
- Published colors
- Red
- Frame
- Easton Custom HBO aluminum
- Original equipment
- Grip Shift ESP 9.0SL/Shimano Deore XT
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildEaston Custom HBO aluminum · Grip Shift ESP 9.0SL/Shimano Deore XT · 26" wheels
Frameset
| Frame Construction | Welded |
|---|---|
| Frame Material | Easton Custom HBO aluminum |
| Fork | Marzocchi Bomber Z-2 |
| Fork Material | Aluminum, triple-clamp crown |
Drivetrain
| Component Group | Grip Shift ESP 9.0SL/Shimano Deore XT |
|---|---|
| Shifters | Grip Shift ESP 9.0SL |
| Front Derailleur | Shimano Deore XT top-swing, top-pull/clamp-on 31.8mm |
| Rear Derailleur | Grip Shift ESP 9.0SL |
| Crankset | Race Face Turbine LP, 22/32/44 teeth |
| Bottom Bracket | Shimano BB-UN72 |
| Rear Cogs | 8-speed, 11 - 30 teeth |
| Chain | Taya TB-700, 1/2 x 3/32" |
| Pedals | Ritchey Expert |
Brakes
| Brakes | Shimano Deore XT V-Brake brakes, Grip Shift ESP 9.0 levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Ritchey Fuzzy Logic |
|---|---|
| Handlebar | Syncros |
| Handlebar Extensions | Not included |
| Stem | Syncros |
| Saddle | Selle Italia Future Race |
| Seatpost | Syncros |
Wheels & Tires
| Hubs | Shimano Deore XT |
|---|---|
| Rims | Sun Rims CR17A |
| Spokes | DT stainless steel, 2.0mm double-butted |
| Front Tire | 26 x 1.95" WTB VelociRaptor 44/50 kevlar |
| Wheel Size | 26" wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 4 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 585 mm |
| Head-tube angle | 71° |
| Seat-tube angle | 73.5° |
| Fork offset / rake | 40.6 mm |
Frame size not recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
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
Grip Shift ESP 9.0 levers
More parts (5)Fewer parts
22/32/44 teeth
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" WTB VelociRaptor 44/50 kevlar
- Drivetrain
- 8-speed
- Bottom bracket / shell
- Shimano BB-UN72
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: Welded · Fork: Marzocchi Bomber Z-2 · Aluminum, triple-clamp crown
Suspension
Evaluate the suspension →Archived: Fork: Marzocchi Bomber Z-2
Drivetrain
Check drivetrain wear →Archived: Group: Grip Shift ESP 9.0SL/Shimano Deore XT · Shifters: Grip Shift ESP 9.0SL · Front derailleur: Shimano Deore XT top-swing, top-pull/clamp-on 31.8mm · Rear derailleur: Grip Shift ESP 9.0SL · Crankset: Race Face Turbine LP, 22/32/44 teeth · Bottom bracket: Shimano BB-UN72 · Rear cogs: 8-speed, 11 - 30 teeth · Chain: Taya TB-700, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano Deore XT V-Brake brakes, Grip Shift ESP 9.0 levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Sun Rims CR17A · Hubs: Shimano Deore XT · Front tire: 26 x 1.95" WTB VelociRaptor 44/50 kevlar
Controls and contact points
Archived: Headset: 1 1/8" threadless Ritchey Fuzzy Logic · Handlebar: Syncros · Stem: Syncros · Seatpost: Syncros · Saddle: Selle Italia Future Race · Pedals: Ritchey Expert
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.



