2021 Cannondale

Synapse Hi-MOD GRX Di2

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

MSRP$7,875
FrameCarbon
SuspensionRigid
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 11 Electronic
GroupsetGRX Di2
BrakesHydraulic 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)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

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
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

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

Mar 2018

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

Canadian Cycling Magazine
Cannondale Synapse Carbon Disc 105 review

Mar 2018 · Matthew Pioro

Balanced comfort and performance

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
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

TypeHydraulic 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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Last updated September 12
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