Velopedia Bicycle Archive

1993 Ross Gran Tour

Original specifications: Shimano Tourney 20 drivetrain · 27" wheels · legacy reference geometry.

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At a glance

Archive #41379

Model year: 1993
Category: Road
Original MSRP: $249.00
Sizes: 19, 21, 23, 25, 19WM, Boys 13/w 24-inch wheel
Geometry: Legacy reference
In this record: 18 specifications · original MSRP · geometry

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Identification clues

1993 archived details

Original equipment: Shimano Tourney 20

Clues, not proof of model year. Colors vary and components may have been replaced.

Original buildShimano Tourney 20 · 27" wheels

Manufacturer catalog

Published sizes and colors

6 sizes

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

Published sizes

1921232519WMBoys 13/w 24-inch wheel

Frameset

Frame Construction	TIG-welded steel

Drivetrain

Component Group	Shimano Tourney 20
Shifters	Shimano Tourney 20 thumbshifters
Front Derailleur	Shimano Tourney 20
Rear Derailleur	Shimano Tourney 20
Crankset	SR CFC-405, 42/52 teeth
Rear Cogs	6-speed, 14 - 28 teeth
Chain	KMC UG-50
Pedals	Victor 393

Brakes

Brakes	Alloy brakes, levers

Cockpit & Contact Points

Handlebar	H.L. steel
Stem	Alloy
Saddle	Ross
Seatpost	Alloy

Wheels & Tires

Hubs	Jou Yu
Rims	Weinmann 2115, 36-hole
Front Tire	27 x 1 1/4"
Wheel Size	27" wheels

Geometry

Legacy reference · 6 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 6 measurements

Measurement	Legacy reference
Top tube	553.7 mm
Head-tube angle	74°
Seat-tube angle	74°
Chainstay / rear center	424.2 mm
Wheelbase	1026.2 mm
Fork offset / rake	61 mm

Frame size not recorded.

Gearing

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

Published build52/42T · 14–28T · 6-speed

Lowest1.50:1 Highest3.71:1 Total range248%

Speed unavailable: wheel or tire size is missing or unclear.

Add your rear tire size to calculate speed

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.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Rear tire marking

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).

Rim diameter (BSD, mm) Tire width (mm)

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.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
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

Original specifications

Front derailleur · Original

Shimano Tourney 20

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Rear derailleur · Original

Shimano Tourney 20

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Shifters · Original

Shimano Tourney 20 thumbshifters

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Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire: 27 x 1 1/4"
Drivetrain: 6-speed

Equipment inspection checks 9 checks based on 5 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 steel

Check paint damage, vent holes and accessible internal surfaces for corrosion. Look for dents, bent tubes and cracking around welded or brazed joints.

Drivetrain

Check drivetrain wear →

Archived: Group: Shimano Tourney 20 · Shifters: Shimano Tourney 20 thumbshifters · Front derailleur: Shimano Tourney 20 · Rear derailleur: Shimano Tourney 20 · Crankset: SR CFC-405, 42/52 teeth · Rear cogs: 6-speed, 14 - 28 teeth · Chain: KMC UG-50

Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Brakes

Inspect the brakes →

Archived: Brakes: Alloy brakes, levers

Inspect pads and braking surfaces, check the complete cable or hose path, and confirm both controls feel consistent and return cleanly.

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 27" wheels · Rims: Weinmann 2115, 36-hole · Hubs: Jou Yu · Front tire: 27 x 1 1/4"

Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play.
Inspect both tire casings for cuts, cracking, plugs, bulges or exposed threads and confirm the installed sizes are safe for the rims and available frame and fork clearance.

Controls and contact points

Archived: Handlebar: H.L. steel · Stem: Alloy · Seatpost: Alloy · Saddle: Ross · Pedals: Victor 393

Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
Check that the seatpost moves for adjustment and that the saddle, post and clamp hold securely without cracks, severe corrosion or damaged hardware.

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

1993 Ross Gran Tour

Published sizes and colors

Published sizes

Frameset

Drivetrain

Brakes

Cockpit & Contact Points

Wheels & Tires

Geometry

Gearing

Gearing results

Find replacement parts

Frame and fork

Drivetrain

Brakes

Wheels and tires

Controls and contact points

My Garage

Find this bike on eBay

1993 Ross Gran Tour

Published sizes and colors

Published sizes

Frameset

Drivetrain

Brakes

Cockpit & Contact Points

Wheels & Tires

Geometry

Gearing

Gearing results

Find replacement parts

Frame and fork

Drivetrain

Brakes

Wheels and tires

Controls and contact points

Find this bike on eBay

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