Which size or configuration labels have geometry for the 2018 Cannondale Synapse Hi-MOD Disc eTap?

Geometry is listed for 48, 51, 54, 56, 58, and 61.

What are the reach and stack of the 2018 Cannondale Synapse Hi-MOD Disc eTap in size 56?

In size 56, reach is 386 mm and stack is 590 mm.

What is the head tube angle of the 2018 Cannondale Synapse Hi-MOD Disc eTap?

The head tube angle is 73 degrees in size 56.

What does the 2018 Cannondale Synapse Hi-MOD Disc RED eTap ship with?

The stock build includes Cannondale Synapse, Synapse, SRAM RED ETAP HRD, and Cannondale HollowGram Si.

Which years of the Cannondale Synapse are on Quiver?

Quiver has the Cannondale Synapse for 2018, 2025, 2021, 2020, 2019, 2016, and 2015.

2018 Cannondale Synapse Hi-MOD Disc eTap geometry and specs

Key facts

Brand: Cannondale
Model: Synapse
Model year: 2018
Frame: Hi-MOD Disc eTap
Type: Road
Geometry labels: 48, 51, 54, 56, 58, and 61
Drivetrain: SRAM RED E-TAP
Fork: Synapse
Wheels: Cannondale HollowGram Si
Geometry: Some measurements unavailable
Checked: Oct 24, 2026

Geometry by size

2018 Cannondale Synapse Hi-MOD Disc eTap geometry by size
Measurement	48	51	54	56	58	61
Reach(mm)	Not available	377	382	386	393	402
Stack(mm)	Not available	550	570	590	610	640
Head tube angle(°)	Not available	71.7	71.7	73	73	73
Seat tube angle(°)	Not available	74.3	73.9	73.5	73	72.5
Effective top tube(mm)	Not available	531	547	561	579	604
Wheelbase(mm)	Not available	994	1008	995	1009	1028
BB drop(mm)	Not available	Not available	73	73	70	70
BB height(mm)	Not available	Not available	272	272	275	275
Standover(mm)	Not available	742	773	804	833	868
Seat tube length(mm)	407	443	480	520	550	590
Head tube length(mm)	122	137	161	173	197	229

Not available

Requested. Requests decide what we research next.

How to read a geometry chart

Stock build

16 parts

Frame

Cannondale Synapse

Frame

Suspension

Synapse

Fork

Drivetrain

SRAM RED ETAP HRD

Shifter

SRAM RED E-TAP

Derailleur

SRAM RED eTap WiFli

Derailleur

SRAM PG-1170

Cassette

SRAM PC-1170

Chain

SRAM RED

Crankset

Wheels & Tires

Cannondale HollowGram Si

Wheelset

Brakes

SRAM RED eTap hydro

Brake

SRAM RED eTap HRD

Brake

Cockpit

Cannondale Escape

Handlebar

Cannondale SAVE

Stem

Synapse Si

Headset

Seatpost & Saddle

Cannondale SAVE

Seatpost

Fabric Scoop

Saddle

Keep your Synapse Hi-MOD Disc RED eTap in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

Free on App Store Free on Google PlayFree for your first bike, on iPhone and Android.

Already have Quiver? Open this build

Keep the factory build and your current parts distinct

Bikes to compare with the Synapse

Same kind of bike with the closest frame angles and proportions. Differences are how each one compares to this bike.

2016 Specialized Roubaix SL4 Expert Disc UDi2
Close on every number both bikes have.
Compare
2019 Specialized Allez Sport
Lower bottom bracket.
Compare
2020 Specialized Allez E5
Close on every number both bikes have.
Compare
2019 Trek Madone SL
Close on every number both bikes have.
Compare

Quick answers

Which size or configuration labels have geometry for the 2018 Cannondale Synapse Hi-MOD Disc eTap?: Geometry is listed for 48, 51, 54, 56, 58, and 61.
What are the reach and stack of the 2018 Cannondale Synapse Hi-MOD Disc eTap in size 56?: In size 56, reach is 386 mm and stack is 590 mm.
What is the head tube angle of the 2018 Cannondale Synapse Hi-MOD Disc eTap?: The head tube angle is 73 degrees in size 56.
What does the 2018 Cannondale Synapse Hi-MOD Disc RED eTap ship with?: The stock build includes Cannondale Synapse, Synapse, SRAM RED ETAP HRD, and Cannondale HollowGram Si.
Which years of the Cannondale Synapse are on Quiver?: Quiver has the Cannondale Synapse for 2018, 2025, 2021, 2020, 2019, 2016, and 2015.