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2021 Cannondale

Synapse Hi-MOD GRX Di2

A carbon frame endurance bike with high-end components and shimano ultegra hydraulic disc brakes.

Manufacturer Price

$7,875
FrameCarbon
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 11 Electronic
GroupsetGRX Di2
BrakesShimano Ultegra Hydraulic Disc
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
Synapse Hi-MOD GRX Di2
Other Endurance bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

39 mph

Synapse Hi-MOD GRX Di2

39 mph

Similar Bikes

Highest gear

(descending)

Sizing
48cm

5'2" – 5'6"

51cm

5'5" – 5'10"

54cm

5'7" – 5'11"

56cm

5'9" – 6'1"

58cm

6'0" – 6'4"

61cm

6'3" – 6'8"

Rider Fit Notes

None yet.

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Reviews

Summary

The Cannondale Synapse is celebrated for its smooth ride quality, versatile tyre clearance, and stable yet responsive handling, making it a standout in the endurance category. Its comfort and efficiency are frequently highlighted, with many reviewers praising its ability to blend speed with a forgiving ride position. However, the SmartSense system and some component choices have drawn mixed reactions, with some finding them innovative and others seeing them as unnecessary additions that add weight and complexity.

Pros
  • Smooth ride quality

  • Versatile tyre clearance

  • Stable yet responsive handling

  • Comfortable endurance geometry

  • Efficient power transfer

Cons
  • Controversial SmartSense system

  • Weight concerns

  • Some component choices questioned

  • SmartSense adds complexity

  • Mixed reactions to electronic aids

Key Quotes
When I think of this bike, I just think of butter. Everything about it felt super smooth.
Cycling Tips logoCycling Tips
The latest Synapse is the best iteration of the model to date.
Cyclist logoCyclist
The Synapse is a real joy to ride in these times, despite shorter outings.
BikeRadar logoBikeRadar
With the 2022 Cannondale Synapse, you’ll be prepared for almost any eventuality, as long as most of it happens on asphalt.
Gran Fondo Magazine logoGran Fondo Magazine
The Synapse shines brightest in providing all-day ride comfort and handling characteristics that inspire confidence.
Road Bike Action

Feedback?

View all reviews

Gran Fondo Magazine
First ride review: 2022 Cannondale Synapse – Safer on the road thanks to Cannondale SmartSense?

Jan 2022 · By

Cannondale have overhauled the Synapse, adding an integrated radar and lights. Can it offer improved safety on the road? Read on to find out.

Highs
  • Added safety for cyclists

  • The lights switch from daytime to night mode automatically

  • Mounting points for mudguards etc.

  • Predictable handling

Lows
  • Lack of cable integration up front

  • Somewhat lacking in long-distance comfort

Read Review

BikeRadar
Cannondale Synapse Disc Ultegra long-term review

Jan 2021 · Felix Smith

This is an initial score and could change as I spend more time on the bike

Highs
  • Cannondale's SAVE 'micro-suspension' is incredibly effective at taming rough tarmac and the low gearing and 32mm tyre clearance encourages more adventurous cycling

Lows
  • Messy cables up front detract from the otherwise clean overall design and the wheels and tyres are lacking modern endurance spec

Read Review

Cycling Weekly
Cannondale Synapse Hi-Mod Disc Red eTap review

May 2019 · James Bracey

Cannondale’s endurance machine packs in more than just a comfortable ride

Highs
  • Handling

  • Specification

Lows
  • Limited height adjustability of stem

Read Review

Road Bike Action
Bike Test: Cannondale Synapse Hi-Mod With Campagnolo 12-Speed

Feb 2019 · David Kennedy

Combining an American chassis with Italian parts

Read Review

road.cc
Cannondale Synapse Hi-Mod Disc Dura-Ace Di2

Jun 2018 · David Arthur @davearthur

Fast, smooth and fun, the new Synapse is an exceedingly good endurance bike

Read Review

Velo
Pro Bike Gallery: Sebastian Langeveld’s Cannondale Synapse

Apr 2018 · VeloNews.com

EF Education First-Drapac rider Sebastian Langeveld will ride disc brakes at Roubaix after making the podium in 2017.

Read Review

Canadian Cycling Magazine
EF Education First-Drapac's Cannondale Synapse Disc for Paris-Roubaix

Apr 2018 · Canadian Cycling Magazine

American team chooses disc brakes and Cannondale's endurance frame for a day in hell

Read Review

Bikerumor
Review: Cannondale Synapse Carbon Disc road bike is the perfect all 'rounder

Mar 2018 · Tyler Benedict

The 2018 Cannondale Synapse Carbon Disc proves you can have speed and comfort in the same bike. With race worthy handling and power transfer, the SAVE seatstays, chainstays and fork add bump-eating compliance for a bike that can go long and fast. Read our full review with actual weights right here!

Read Review

Geometry
Specs
Build
Frame

Hi-MOD Carbon, Di2 ready, SAVE, BB30a, flat mount, 12x142mm thru axle, internal cable routing, removable fender bridge

BB StandardBB30, Press Fit

ColorBlack Pearl

Fork

BallisTec Hi-MOD Full Carbon, integrated crown race, SAVE, size-specific design, 12x100mm thru-axle, internal routing

Bottom Bracket

Cannondale BB30

Headset

Synapse Carbon, integrated, 1-1/8" - 1-1/8" (48cm), 1-1/8" - 1-1/4" (51-54cm), 1-1/8" - 1-3/8" (56-61cm)

Stem

HollowGram SAVE, Alloy, -6°

Handlebar

HollowGram SAVE SystemBar, Carbon, 8 deg. pitch adjust

Saddle

Fizik New Aliante R3, 150mm width, K:ium rails

Seatpost

HollowGram SAVE Carbon, 25.4 x 350mm (44-56), 400mm (58-61)

TypeRigid

Pedals

Not included

Grips

Cannondale Bar Tape, 3.5mm

Groupset
Rear Derailleur

Shimano GRX 815, Di2, Shadow RD+

Front Derailleur

Shimano GRX 815, Di2, braze-on

Crank

HollowGram, BB30a, OPI SpideRing, 50/34

Shifters

Shimano GRX 815, Di2, 11-speed

Cassette

Shimano Ultegra HG800, 11-34T, 11-speed

Chain

Shimano HG701, 11-speed

Brakes

Shimano Ultegra GRX Di2 hydraulic disc, 160/160mm RT800 rotors

TypeShimano Ultegra Hydraulic Disc

Brake Levers

Shimano Ultegra GRX Di2 hydraulic disc

Wheels
Rims

HollowGram 45 SL KNØT, Carbon, 20h front, 24h rear, 45mm deep, 21mm IW, tubeless ready

Spokes

DT Swiss Aerolite, straight-pull

Front Hub

HollowGram KNØT, sealed bearing 12x100 centerlock

Rear Hub

HollowGram KNØT, 12x142 centerlock w/ DT Swiss internals

Tires

WTB Exposure, 700 x 30c

Rider Notes
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First added July 7

Last updated September 12

Not listed for 1,729 days