Velopedia Bicycle Archive

1998 Rocky Mountain 2XS

Original specifications: Shimano XTR · 8-speed · mechanical rear derailleur · 26" wheels · legacy reference geometry.

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At a glance

Archive #72372
Model year
1998
Category
Mountain
Original MSRP
$4,649.00
Sizes
16.5", 18", 19.5"
Colors
Black front/red rear
Geometry
Legacy reference
In this record
26 specifications · archived image · original MSRP · geometry
Campaign
Original buildCarbon fiber composite main triangle w/Easton rear stays · Mountain Mix · 26" wheels

Manufacturer catalog

Published sizes and colors

3 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

16.5"18"19.5"

Published colors

Black front/red rear

Frameset

Frame ConstructionLaminated carbon fiber/welded aluminum
Frame MaterialCarbon fiber composite main triangle w/Easton rear stays
ForkMarzocchi Bomber Z-1 BAM
Fork MaterialAluminum, triple-clamp crown
Rear ShockFox Vanilla TC, 4.0" or 6.0" travel

Drivetrain

Component GroupMountain Mix
ShiftersShimano XTR RapidFire SL
Front DerailleurShimano XTR top-swing, top-pull/clamp-on 31.8mm
Rear DerailleurShimano XTR SGS
CranksetShimano XTR M950, 24/34/46 teeth
Bottom BracketShimano BB-M950
Rear Cogs8-speed, 12 - 32 teeth
ChainShimano CN-IG90, 1/2 x 3/32"
PedalsShimano PD-M747 SPD

Brakes

BrakesFormula Hydraulic disc brakes, Formula Hydraulic levers

Cockpit & Contact Points

Headset1 1/8" threadless Race Face Real Seal
HandlebarRoox FPS DH
Handlebar ExtensionsNot included
StemRooX
SaddleSelle Italia Flite
SeatpostRace Face XY

Wheels & Tires

HubsFormula
RimsFront: Sun Rims 0 XC, Rear: Sun Rims XC
SpokesDT stainless steel, 2.0mm double-butted
Front Tire26 x 1.95" Hutchinson Chameleon
Wheel Size26" wheels

Geometry

Legacy reference · 3 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 3 measurements
MeasurementLegacy reference
Top tube590 mm
Seat-tube angle73.5°
Fork offset / rake40.6 mm

Frame size not recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

All published sizes46/34/24T · 12–32T · 8-speed
Lowest0.75:1 Highest3.83:1 Total range511%
Estimated speed At 90 RPM Lowest gear5.2 mph Highest gear26.6 mph

Uses front tire 26×1.95; 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.

Try other gearing

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

Your changes apply to this calculation. The archived build stays unchanged.

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
Chain · Original
Shimano CN-IG90

1/2 x 3/32"

Retailer offers
Front tire · Original
26 x 1.95" Hutchinson Chameleon
Bottom bracket · Original
Shimano BB-M950
More parts (7)Fewer parts
Pedals · Original
Shimano PD-M747 SPD
Saddle · Original
Selle Italia Flite
Crankset · Original
Shimano XTR M950

24/34/46 teeth

Rear derailleur · Original
Shimano XTR SGS
Shifters · Original
Shimano XTR RapidFire SL
Seatpost · Original
Race Face XY
Headset · Original
1 1/8" threadless Race Face Real Seal

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" Hutchinson Chameleon
Drivetrain
8-speed
Bottom bracket / shell
Shimano BB-M950
Equipment inspection checks 13 checks based on 6 archived component groups Open equipment checksClose equipment checks
0 of 13 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 →

Archived: Frame: Laminated carbon fiber/welded aluminum · Fork: Marzocchi Bomber Z-1 BAM · Aluminum, triple-clamp crown

Archived: Fork: Marzocchi Bomber Z-1 BAM · Rear shock: Fox Vanilla TC, 4.0" or 6.0" travel

Archived: Group: Mountain Mix · Shifters: Shimano XTR RapidFire SL · Front derailleur: Shimano XTR top-swing, top-pull/clamp-on 31.8mm · Rear derailleur: Shimano XTR SGS · Crankset: Shimano XTR M950, 24/34/46 teeth · Bottom bracket: Shimano BB-M950 · Rear cogs: 8-speed, 12 - 32 teeth · Chain: Shimano CN-IG90, 1/2 x 3/32"

Archived: Brakes: Formula Hydraulic disc brakes, Formula Hydraulic levers

Archived: Wheel size: 26" wheels · Rims: Front: Sun Rims 0 XC, Rear: Sun Rims XC · Hubs: Formula · Front tire: 26 x 1.95" Hutchinson Chameleon

Controls and contact points

Archived: Headset: 1 1/8" threadless Race Face Real Seal · Handlebar: Roox FPS DH · Stem: RooX · Seatpost: Race Face XY · Saddle: Selle Italia Flite · Pedals: Shimano PD-M747 SPD

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Campaign

Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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