Velopedia Bicycle Archive

1993 Royce Union Vesuvious

Original specifications: Shimano Altus C20 drivetrain · 26" wheels · 31 lb published weight.

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At a glance

Model year
1993
Category
Mountain
Original MSRP
$309.00
Sizes
18, 20
Weight
31 lb
Geometry
Legacy reference
In this record
20 specifications · original MSRP · geometry
Archive ID
44621
Original buildSuper OS high-tensile steel · Shimano Altus C20 · 26" wheels

Manufacturer catalog

Published sizes and colors

2 sizes

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

Published sizes

1820

Frameset

Frame ConstructionTIG-welded steel
Frame MaterialSuper OS high-tensile steel
ForkHigh-tensile steel

Drivetrain

Component GroupShimano Altus C20
ShiftersShimano Altus C20 Rapidfire
Front DerailleurShimano Altus C20
Rear DerailleurShimano Altus C20
CranksetTracer, 28/38/48 teeth
Rear Cogs6-speed, 13 - 30 teeth
ChainShimano
PedalsATB resin

Brakes

BrakesShimano cantilevers brakes, levers

Cockpit & Contact Points

HandlebarFlat ATB
StemAtb
SaddleGel EM ATB
SeatpostQr

Wheels & Tires

HubsAlloy Q/R
RimsAlloy, 36-hole
Front Tire26 x 1.90" gumwall
Wheel Size26" wheels

Geometry

Legacy reference · 6 measurements

Model-level measurements; the frame size was not recorded. Use these as a historical reference, not for size-specific fit.

All geometry measurementsLegacy reference · 6 measurements
MeasurementLegacy reference
Top tube558.8 mm
Head-tube angle70°
Seat-tube angle70°
Chainstay / rear center426.7 mm
Wheelbase1051.6 mm
Fork offset / rake50.8 mm

The preserved source contains one model-level geometry set without an identified frame size.

Gearing

Chainring ÷ rear sprocket

Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.

RPM
Theoretical speed from published tire dimensions; see the evidence note below.
Published build48/38/28T · 13–30T · 6-speed
Lowest0.93:1 Highest3.69:1 Total range396%
Estimated speed Lowest gear6.5 mph Highest gear25.5 mph

Estimate uses the published front tire 26×1.9 as a proxy, corroborated by the wheel size. Rear tire size is not published or verified. Approximate circumference; actual rollout varies with tire and pressure. Theoretical, not a maximum achievable speed.

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: 1993 Royce Union Vesuvious · Mountain bike, non-suspension · Published sizes: 18, 20

Archived: Frame: TIG-welded steel · Fork: High-tensile steel

Archived: Group: Shimano Altus C20 · Shifters: Shimano Altus C20 Rapidfire · Front derailleur: Shimano Altus C20 · Rear derailleur: Shimano Altus C20 · Crankset: Tracer, 28/38/48 teeth · Rear cogs: 6-speed, 13 - 30 teeth · Chain: Shimano

Archived: Brakes: Shimano cantilevers brakes, levers

Archived: Wheel size: 26" wheels · Rims: Alloy, 36-hole · Hubs: Alloy Q/R · Front tire: 26 x 1.90" gumwall

Controls and contact points

Archived: Handlebar: Flat ATB · Stem: ATB · Seatpost: QR · Saddle: Gel EM ATB · Pedals: ATB resin

Before and during the test ride

Follow the full used-bike inspection order →

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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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