Estimate uses the published front tire 650C×23 · nominal 23-571 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
1997 Aegis 650 CHI/4
Original specifications: Shimano 105SC drivetrain · 650c wheels · legacy reference geometry.
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At a glance
- Model year
- 1997
- Category
- Road
- Original MSRP
- $2,099.00
- Sizes
- Womens 44 cm, womens 46 cm, womens 48 cm
- Colors
- Black, Blue, Custom, Red, Violet, White, Yellow
- Geometry
- Legacy reference
- In this record
- 26 specifications · original MSRP · geometry
- Archive ID
- 63662
Original buildCarbon fiber composite · Shimano 105SC · 650c wheels
Frameset
| Frame Construction | Monocoque |
|---|---|
| Frame Material | Carbon fiber composite |
| Fork | Aegis Fresh Ride |
| Fork Material | Carbon fiber composite, aero crown |
Drivetrain
| Component Group | Shimano 105SC |
|---|---|
| Shifters | Shimano 105SC STI Dual Control |
| Front Derailleur | Shimano 105SC, bottom-pull/braze-on |
| Rear Derailleur | Shimano 105SC SS |
| Crankset | Shimano 105SC, 39/53 teeth |
| Bottom Bracket | Shimano BB-UN52, 107 mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 8-speed, 12 - 23 teeth |
| Chain | Shimano CN-HG71, 1/2 x 3/32" |
| Pedals | Not included |
Brakes
| Brakes | Shimano 105SC Dual Pivot brakes, Shimano 105SC levers |
|---|
Cockpit & Contact Points
| Headset | 1" Shimano 105SC |
|---|---|
| Handlebar | TTT Forma SL |
| Stem | TTT Synthesis |
| Saddle | Selle San Marco Squadra HDP, chromoly rails |
| Seatpost | Syncros Pro Series aluminum, 26.8 mm diameter |
Wheels & Tires
| Hubs | Shimano 600 Ultegra |
|---|---|
| Rims | Mavic CXP 12, 28-hole |
| Spokes | Wheelsmith stainless steel, 2.0mm double butted |
| Spoke Nipples | Alloy nipples |
| Front Tire | 650 x 23c Continental Grand Prix kevlar |
| Wheel Size | 650c 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 Use these as a historical reference, not for size-specific fit.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 | 485 mm |
| Head-tube angle | 72.5° |
| Seat-tube angle | 75° |
| Chainstay / rear center | 406 mm |
| Wheelbase | 932 mm |
| Fork offset / rake | 35 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: 1997 Aegis 650 CHI/4 · Road race & triathlon · Published sizes: Womens 44 cm, womens 46 cm, womens 48 cm
Frame and fork
Inspect the frame and fork →Archived: Frame: Monocoque · Fork: Aegis Fresh Ride · Carbon fiber composite, aero crown
Drivetrain
Check drivetrain wear →Archived: Group: Shimano 105SC · Shifters: Shimano 105SC STI Dual Control · Front derailleur: Shimano 105SC, bottom-pull/braze-on · Rear derailleur: Shimano 105SC SS · Crankset: Shimano 105SC, 39/53 teeth · Bottom bracket: Shimano BB-UN52, 107 mm spindle · Rear cogs: 8-speed, 12 - 23 teeth · Chain: Shimano CN-HG71, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano 105SC Dual Pivot brakes, Shimano 105SC levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 650c wheels · Rims: Mavic CXP 12, 28-hole · Hubs: Shimano 600 Ultegra · Front tire: 650 x 23c Continental Grand Prix kevlar
Controls and contact points
Archived: Headset: 1" Shimano 105SC · Handlebar: TTT Forma SL · Stem: TTT Synthesis · Seatpost: Syncros Pro Series aluminum, 26.8 mm diameter · Saddle: Selle San Marco Squadra HDP, chromoly rails · 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.
