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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

Manufacturer catalog

Published sizes and colors

3 sizes · 7 colors

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

Published sizes

Womens 44 cmwomens 46 cmwomens 48 cm

Published colors

BlackBlueCustomRedVioletWhite
+ 1 more color + 3 more colors
VioletWhiteYellow

Frameset

Frame ConstructionMonocoque
Frame MaterialCarbon fiber composite
ForkAegis Fresh Ride
Fork MaterialCarbon fiber composite, aero crown

Drivetrain

Component GroupShimano 105SC
ShiftersShimano 105SC STI Dual Control
Front DerailleurShimano 105SC, bottom-pull/braze-on
Rear DerailleurShimano 105SC SS
CranksetShimano 105SC, 39/53 teeth
Bottom BracketShimano BB-UN52, 107 mm spindle
BB Shell Width68mm English
Rear Cogs8-speed, 12 - 23 teeth
ChainShimano CN-HG71, 1/2 x 3/32"
PedalsNot included

Brakes

BrakesShimano 105SC Dual Pivot brakes, Shimano 105SC levers

Cockpit & Contact Points

Headset1" Shimano 105SC
HandlebarTTT Forma SL
StemTTT Synthesis
SaddleSelle San Marco Squadra HDP, chromoly rails
SeatpostSyncros Pro Series aluminum, 26.8 mm diameter

Wheels & Tires

HubsShimano 600 Ultegra
RimsMavic CXP 12, 28-hole
SpokesWheelsmith stainless steel, 2.0mm double butted
Spoke NipplesAlloy nipples
Front Tire650 x 23c Continental Grand Prix kevlar
Wheel Size650c 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 Use these as a historical reference, not for size-specific fit.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 tube485 mm
Head-tube angle72.5°
Seat-tube angle75°
Chainstay / rear center406 mm
Wheelbase932 mm
Fork offset / rake35 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 build53/39T · 12–23T · 8-speed
Lowest1.70:1 Highest4.42:1 Total range260%
Estimated speed Lowest gear11.0 mph Highest gear28.7 mph

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.

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: 1997 Aegis 650 CHI/4 · Road race & triathlon · Published sizes: Womens 44 cm, womens 46 cm, womens 48 cm

Archived: Frame: Monocoque · Fork: Aegis Fresh Ride · Carbon fiber composite, aero crown

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"

Archived: Brakes: Shimano 105SC Dual Pivot brakes, Shimano 105SC levers

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.

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