Estimate uses the published front tire 700C×23 · nominal 23-622 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.
Velopedia Bicycle Archive
2003 EPX 303 - Tiagra
Original specifications: Shimano Tiagra drivetrain · 700c wheels · legacy reference geometry.
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At a glance
- Model year
- 2003
- Category
- Road
- Original MSRP
- $1,399.00
- Sizes
- 50cm, 53cm, 56cm, 59cm, 62cm
- Colors
- Yellow/Carbon
- Geometry
- Legacy reference
- In this record
- 27 specifications · archived image · original MSRP · geometry
- Archive ID
- 30271
Original buildCarbon fiber composite · Shimano Tiagra · 700c wheels
Frameset
| Frame Construction | Bonded/monocoque |
|---|---|
| Frame Material | Carbon fiber composite |
| Fork | Epx |
| Fork Material | Carbon fiber composite w/aluminum steerer, unicrown crown |
Drivetrain
| Component Group | Shimano Tiagra |
|---|---|
| Shifters | Shimano Tiagra STI Dual Control |
| Front Derailleur | Shimano Tiagra, braze-on |
| Rear Derailleur | Shimano Tiagra SS |
| Crankset | Shimano Tiagra, 39/53 teeth |
| Bottom Bracket | Shimano BB-UN52, 109.5mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 9-speed, 12 - 23 teeth |
| Chain | Shimano CN-HG53, 1/2 x 3/32" |
| Pedals | Not included |
Brakes
| Brakes | Shimano Tiagra Dual Pivot brakes, Shimano Tiagra STI Dual Control levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" integrated Cane Creek |
|---|---|
| Handlebar | ITM Super Italian Pro 330 |
| Handlebar Extensions | Not included |
| Stem | Itm |
| Saddle | Selle San Marco ODS |
| Seatpost | ITM 210, 27.2mm diameter |
Wheels & Tires
| Hubs | Shimano Tiagra |
|---|---|
| Rims | Mavic CXP 21, 32-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 700 x 23c Continental Ultra 2000 Kevlar |
| Wheel Size | 700c wheels |
Geometry
Model-level measurements; the frame size was not recorded. Use these as a historical reference, not for size-specific fit.
Reference frame view
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 6 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 560 mm |
| Head-tube angle | 73° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 406 mm |
| Wheelbase | 995 mm |
| Fork offset / rake | 43 mm |
The preserved source contains one model-level geometry set without an identified frame size.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
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.
Identity and fit
Follow the full used-bike inspection order →Archived: 2003 EPX 303 - Tiagra · Road race & triathlon · Published sizes: 50cm, 53cm, 56cm, 59cm, 62cm
Frame and fork
Inspect the frame and fork →Archived: Frame: Bonded/monocoque · Fork: EPX · Carbon fiber composite w/aluminum steerer, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Group: Shimano Tiagra · Shifters: Shimano Tiagra STI Dual Control · Front derailleur: Shimano Tiagra, braze-on · Rear derailleur: Shimano Tiagra SS · Crankset: Shimano Tiagra, 39/53 teeth · Bottom bracket: Shimano BB-UN52, 109.5mm spindle · Rear cogs: 9-speed, 12 - 23 teeth · Chain: Shimano CN-HG53, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano Tiagra Dual Pivot brakes, Shimano Tiagra STI Dual Control levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Mavic CXP 21, 32-hole · Hubs: Shimano Tiagra · Front tire: 700 x 23c Continental Ultra 2000 Kevlar
Controls and contact points
Archived: Headset: 1 1/8" integrated Cane Creek · Handlebar: ITM Super Italian Pro 330 · Stem: ITM · Seatpost: ITM 210, 27.2mm diameter · Saddle: Selle San Marco ODS · Pedals: Not included
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.



