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1998 Lodestar Obsession

Original specifications: Mountain Mix drivetrain · 26" wheels · legacy reference geometry.

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At a glance

Model year
1998
Category
Mountain
Original MSRP
$849.00
Sizes
XS, S, M, L
Colors
2H Graphite, Red Hot Red
Geometry
Legacy reference
In this record
27 specifications · archived image · original MSRP · geometry
Archive ID
71428
Original buildProlite extruded magnesium · Mountain Mix · 26" wheels

Manufacturer catalog

Published sizes and colors

4 sizes · 2 colors

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

Published sizes

XSSML

Published colors

2H GraphiteRed Hot Red

Frameset

Frame ConstructionTIG-welded
Frame MaterialProlite extruded magnesium
ForkLodestar
Fork MaterialChromoly, unicrown crown

Drivetrain

Component GroupMountain Mix
ShiftersGrip Shift ESP 5.0
Front DerailleurShimano STX top-swing, top-pull/bottom bracket mount
Rear DerailleurGrip Shift ESP 5.0
CranksetSugino Impel 250, 24/34/42 teeth
Bottom BracketSealed cartridge, 113mm spindle
BB Shell Width73mm English
Rear Cogs7-speed, 11 - 28 teeth
ChainSachs PC-51, 1/2 x 3/32"
PedalsWellgo LU-964

Brakes

BrakesTektro 821A linear-pull brakes, Tektro RBP-376A levers

Cockpit & Contact Points

Headset1 1/8" threadless Aheadset SAS
HandlebarJD Comp JD-810
Handlebar ExtensionsLee Chi alloy
StemJD Comp JD-347
SaddleSelle Royal Eclipse
SeatpostJD Comp JD-430, 28.6mm diameter

Wheels & Tires

HubsShimano Alivio
RimsMavic 221, 32-hole
SpokesDT stainless steel, 2.0mm straight gauge
Spoke NipplesBrass nipples
Front Tire26 x 1.90" Impac IS Desert King
Wheel Size26" wheels

Geometry

Legacy reference · 6 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 6 measurements
MeasurementLegacy reference
Top tube565 mm
Head-tube angle71°
Seat-tube angle73°
Chainstay / rear center425 mm
Wheelbase1063 mm
Fork offset / rake40 mm

Frame size not recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

All published sizes42/34/24T · 11–28T · 7-speed
Lowest0.86:1 Highest3.82:1 Total range445%
Estimated speed At 90 RPM Lowest gear5.9 mph Highest gear26.4 mph

Uses front tire 26×1.9; rear size isn’t listed.

How it works

Ratio = chainring teeth ÷ rear sprocket teeth. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

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Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
0 of 19 checked Progress stays in this browser for this bike.

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.

Archived: 1998 Lodestar Obsession · Mountain bike, non-suspension · Published sizes: XS, S, M, L

Archived: Frame: TIG-welded · Fork: Lodestar · Chromoly, unicrown crown

Archived: Group: Mountain Mix · Shifters: Grip Shift ESP 5.0 · Front derailleur: Shimano STX top-swing, top-pull/bottom bracket mount · Rear derailleur: Grip Shift ESP 5.0 · Crankset: Sugino Impel 250, 24/34/42 teeth · Bottom bracket: Sealed cartridge, 113mm spindle · Rear cogs: 7-speed, 11 - 28 teeth · Chain: Sachs PC-51, 1/2 x 3/32"

Archived: Brakes: Tektro 821A linear-pull brakes, Tektro RBP-376A levers

Archived: Wheel size: 26" wheels · Rims: Mavic 221, 32-hole · Hubs: Shimano Alivio · Front tire: 26 x 1.90" Impac IS Desert King

Controls and contact points

Archived: Headset: 1 1/8" threadless Aheadset SAS · Handlebar: JD Comp JD-810 · Stem: JD Comp JD-347 · Seatpost: JD Comp JD-430, 28.6mm diameter · Saddle: Selle Royal Eclipse · Pedals: Wellgo LU-964

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

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