Velopedia Bicycle Archive

2003 Marin Portofino

Original specifications: Shimano Sora Triple drivetrain · 700c wheels · legacy reference geometry.

Share owner experience

At a glance

Archive #39382

Model year: 2003
Category: Road
Original MSRP: $999.99
Sizes: 48cm, 51cm, 53cm, 55cm, 57cm, 59cm
Colors: Black
Geometry: Legacy reference
In this record: 25 specifications · archived image · original MSRP · geometry

Model history 6 other years

Browse other years

Compare side by side

Identification clues

2003 archived details

Published colors: Black
Frame: Columbus Thron
Original equipment: Shimano Sora Triple

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

Original buildColumbus Thron · Shimano Sora Triple · 700c wheels

Manufacturer catalog

Published sizes and colors

6 sizes · 1 color

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

Published sizes

48cm51cm53cm55cm57cm59cm

Published colors

Black

Frameset

Frame Construction	TIG-welded
Frame Material	Columbus Thron
Fork Material	Carbon fiber composite, unicrown crown

Drivetrain

Component Group	Shimano Sora Triple
Shifters	Shimano Sora STI Dual Control
Front Derailleur	Shimano Sora Triple
Rear Derailleur	Shimano Sora GS
Crankset	Shimano Sora, 30/42/52 teeth
Bottom Bracket	Sealed cartridge
BB Shell Width	68mm English
Rear Cogs	8-speed, 12 - 25 teeth
Chain	Shimano CN-UG50, 1/2 x 3/32"
Pedals	Aluminum cage w/clips & straps

Brakes

Brakes	Shimano Sora Dual Pivot brakes, Shimano Sora STI Dual Control levers

Cockpit & Contact Points

Headset	1" Ritchey Logic
Handlebar	Cinelli Altera
Handlebar Extensions	Not included
Stem	3T Mutant
Saddle	Selle Italia XO
Seatpost	Aluminum micro-adjust

Wheels & Tires

Hubs	Formula Xero Lite XR4
Rims	Formula Xero Lite XR4, 20-hole/24-hole
Spokes	Formula
Front Tire	700 x 23c Kenda Koncept
Wheel Size	700c wheels

Geometry

Legacy reference · 4 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 4 measurements

Measurement	Legacy reference
Top tube	555 mm
Head-tube angle	73°
Seat-tube angle	73.5°
Chainstay / rear center	405 mm

Frame size not recorded.

Gearing

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

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

All published sizes52/42/30T · 12–25T · 8-speed

Lowest1.20:1 Highest4.33:1 Total range361%

Estimated speed At 90 RPM Lowest gear8.5 mph Highest gear30.5 mph

Uses front tire 700C×23; 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.

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

Chain · Original

Shimano CN-UG50

1/2 x 3/32"

Search Amazon Search eBay

Retailer offers

SRAM PC-830 Chain One Color, 8 Speed

Replacement option

Competitive Cyclist ↗$11.00

Front tire · Original

700 x 23c Kenda Koncept

Search Amazon Search eBay

Retailer offers

Vittoria Rubino Pro G2.0 Clincher Tire Black, 700x23

700x23c

Replacement option

Competitive Cyclist ↗$41.10

Saddle · Original

Selle Italia XO

Search eBay

More parts (6)Fewer parts

Crankset · Original

Shimano Sora

30/42/52 teeth

Search eBay

Front derailleur · Original

Shimano Sora Triple

Search eBay

Rear derailleur · Original

Shimano Sora GS

Search eBay

Shifters · Original

Shimano Sora STI Dual Control

Search eBay

Headset · Original

1" Ritchey Logic

Search eBay

Hubs · Original

Formula Xero Lite XR4

Search eBay

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: 700 x 23c Kenda Koncept
Drivetrain: 8-speed
Bottom bracket / shell: Sealed cartridge · 68mm English

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 · Fork: · Carbon fiber composite, unicrown crown

Inspect the complete frame for cracks, dents, distortion, heavy abrasion, suspicious paint differences or evidence of a previous repair.

Drivetrain

Check drivetrain wear →

Archived: Group: Shimano Sora Triple · Shifters: Shimano Sora STI Dual Control · Front derailleur: Shimano Sora Triple · Rear derailleur: Shimano Sora GS · Crankset: Shimano Sora, 30/42/52 teeth · Bottom bracket: Sealed cartridge · Rear cogs: 8-speed, 12 - 25 teeth · Chain: Shimano CN-UG50, 1/2 x 3/32"

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: Shimano Sora Dual Pivot brakes, Shimano Sora STI Dual Control 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: 700c wheels · Rims: Formula Xero Lite XR4, 20-hole/24-hole · Hubs: Formula Xero Lite XR4 · Front tire: 700 x 23c Kenda Koncept

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: Headset: 1" Ritchey Logic · Handlebar: Cinelli Altera · Stem: 3T Mutant · Seatpost: Aluminum micro-adjust · Saddle: Selle Italia XO · Pedals: Aluminum cage w/clips & straps

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.

Have you owned this model?Help preserve its real-world history by sharing your owner experience.

Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.

Display name Required Email address Required · private Ownership Required When or how long you owned it Required Frame size Required Primary type of riding Required Rider height Optional

Overall owner experience Required · at least 120 characters0 of 120 minimum characters Would you own one again? Optional

Add fit, maintenance and buyer detailsOptional · five additional fields

Fit and sizing observations Optional Long-term strengths Optional Problems or recurring maintenance Optional Parts replaced or upgraded Optional What a used buyer should inspect Optional

Your contribution goes directly to Velopedia’s private review queue. We’ll email an optional confirmation link plus a private edit and withdrawal link, but you do not need to confirm your email before an administrator can review or approve the submission.

Already contributed? Send me a fresh private edit link

For privacy, Velopedia shows the same confirmation whether or not an experience exists.

Find this bike on eBay

Search eBay US; check the model year, size and installed components. We may earn a commission from purchases.

Search 2003 model Search all years

Campaign

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

2003 Marin Portofino