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2021 Cannondale CAAD Optimo 2

Original specifications: 700c wheels · geometry for 5 published sizes.

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At a glance

Archive #900004779
Model year
2021
Category
Road
Sizes
48, 51, 54, 56, 58
Colors
Black Pearl (BPL)
Geometry
5 manufacturer sizes
In this record
23 specifications · archived image · geometry
Campaign
Original buildAluminum · 700c

Manufacturer catalog

Published sizes and colors

5 sizes · 1 color

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

Published sizes

4851545658

Published colors

Black Pearl (BPL)

Frameset

Frame ConstructionAll-New SmartForm C2 Alloy, SAVE, tapered headtube, fender mounts, 130x9mm QR
Frame MaterialAluminum
ForkBallisTec Full Carbon, 1-1/8” to 1-1/4” steerer, fender mounts, 100x9mm QR

Drivetrain

ShiftersShimano Tiagra, 10-speed
Front DerailleurShimano Tiagra, 31.8 clamp
Rear DerailleurShimano Tiagra GS
CranksetFSA Omega ME Alloy, 50/34
Bottom BracketFSA Cartridge
Rear CogsShimano HG500, 11-32, 10-speed
ChainKMC X10EL, 10-speed
PedalsWellgo w/ Clip and Strap

Brakes

BrakesPromax RC-476

Cockpit & Contact Points

HeadsetCAAD Optimo, 1-1/8” to 1-1/4”, 25mm top cap
Handlebar6061 alloy, Compact
Stem6061 Alloy, 31.8, 7°
SaddleCannondale Stage CX
SeatpostCannondale 4, 6061 Alloy, 27.2 x 350mm

Wheels & Tires

Hubs(F) Formula RB-31 (R) Formula RB-32
RimsRS 2.0, 24h front, 28h rear
SpokesStainless Steel, 14g
Front TireVittoria Zaffiro, 700c x 25c
Rear TireVittoria Zaffiro, 700c x 25c
Wheel Size700c

Geometry

5 sizes · 16 measurements

Frame measurements by size.

All geometry measurements5 sizes · 16 measurements
Measurement4851545658
Seat tube440 mm467 mm495 mm522 mm549 mm
Effective top tube520 mm530 mm546 mm562 mm578 mm
Head tube108 mm121 mm144 mm165 mm189 mm
Head-tube angle71.9°72.6°72.6°72.6°72.6°
Seat-tube angle74.3°74°73.7°73.3°72.9°
Chainstay / rear center415 mm415 mm415 mm415 mm415 mm
Wheelbase978 mm980 mm994 mm1006 mm1019 mm
Bottom-bracket drop74 mm74 mm72 mm72 mm69 mm
Bottom-bracket height268 mm268 mm270 mm270 mm273 mm
Reach374 mm377 mm384 mm390 mm395 mm
Stack520 mm535 mm555 mm575 mm595 mm
Standover height709 mm731 mm758 mm782 mm808 mm
Fork offset / rake48 mm48 mm48 mm48 mm48 mm
Front center575 mm576 mm590 mm602 mm614 mm
Trail61 mm57 mm57 mm57 mm57 mm
Wheel size700c700c700c700c700c

Dimensions as recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

All published sizes50/34T · 11–32T · 10-speed
Lowest1.06:1 Highest4.55:1 Total range428%
Estimated speed At 90 RPM Lowest gear7.5 mph Highest gear32.2 mph

Rear tire: 700C×25.

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.

Your gearing setup
Gears

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

Rear tire

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).

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.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Front tire · Original
Vittoria Zaffiro

700c x 25c

Retailer offers
Other replacement options (1)
Seatpost · Original
Cannondale 4

6061 Alloy, 27.2 x 350mm

Retailer offers
Chain · Original
KMC X10EL

10-speed

More parts (7)Fewer parts
Cassette / rear cogs · Original
Shimano HG500

11-32, 10-speed

Pedals · Original
Wellgo w/ Clip and Strap
Crankset · Original
FSA Omega ME Alloy

50/34

Front derailleur · Original
Shimano Tiagra

31.8 clamp

Rear derailleur · Original
Shimano Tiagra GS
Shifters · Original
Shimano Tiagra

10-speed

Hubs · Original
(F) Formula RB-31 (R) Formula RB-32

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.

Service essentialsQuick reference before buying parts

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

Front tire
Vittoria Zaffiro, 700c x 25cCheck: Verify the fitted tire’s size marking and rim type.
Rear tire
Vittoria Zaffiro, 700c x 25cCheck: Verify the rear size; it may differ from the front.
Drivetrain
10-speedCheck: Match the installed drivetrain family, not just its speed count.
Seatpost diameter
27.2 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
Bottom bracket / shell
FSA CartridgeCheck: Verify shell type and width, crank interface, and spindle length or spacers.
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 record.

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: 2021 Cannondale CAAD Optimo 2 · Road · Published sizes: 48, 51, 54, 56, 58

Archived: Frame: All-New SmartForm C2 Alloy, SAVE, tapered headtube, fender mounts, 130x9mm QR · Fork: BallisTec Full Carbon, 1-1/8” to 1-1/4” steerer, fender mounts, 100x9mm QR

Archived: Shifters: Shimano Tiagra, 10-speed · Front derailleur: Shimano Tiagra, 31.8 clamp · Rear derailleur: Shimano Tiagra GS · Crankset: FSA Omega ME Alloy, 50/34 · Bottom bracket: FSA Cartridge · Rear cogs: Shimano HG500, 11-32, 10-speed · Chain: KMC X10EL, 10-speed

Archived: Brakes: Promax RC-476

Archived: Wheel size: 700c · Rims: RS 2.0, 24h front, 28h rear · Hubs: (F) Formula RB-31 (R) Formula RB-32 · Front tire: Vittoria Zaffiro, 700c x 25c · Rear tire: Vittoria Zaffiro, 700c x 25c

Controls and contact points

Archived: Headset: CAAD Optimo, 1-1/8” to 1-1/4”, 25mm top cap · Handlebar: 6061 alloy, Compact · Stem: 6061 Alloy, 31.8, 7° · Seatpost: Cannondale 4, 6061 Alloy, 27.2 x 350mm · Saddle: Cannondale Stage CX · Pedals: Wellgo w/ Clip and Strap

Before and during the test ride

Follow the full used-bike inspection order →

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Campaign

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

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