Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v vs Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v

Argon 18

Sum Pro Shimano Dura-ace Di2 R9250 12v

Argon 18

Sum Pro Shimano Ultegra Di2 R8150 12v

Top of the rangeAeroCarbon700c2026

Two builds of the Argon 18 Sum line: 8 differences, mostly in the components.

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v, side view

Argon 18Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v

Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v, side view

Argon 18Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v

At a glance

Differences only

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v has the higher-range groupset: Shimano Dura-Ace Di2, against Shimano Ultegra Di2.

Key specs3 differences

Model year 2026 2026

Weight 6.41 kg –

Frame Carbon

As printed

optimize frame topology and carbon layup

Carbon

As printed

optimize frame topology and carbon layup

Wheelset 700c · Scope Artech A4 700c · DT Swiss ARC1400 Dicut Wheelset

Drivetrain 2×12 2×12

Groupset Shimano Dura-Ace Di2 Higher range

As printed

Rear Derailleur: Shimano Dura-Ace Di2 R9250

Shimano Ultegra Di2

As printed

Rear Derailleur: Shimano Ultegra Di2 R8150

Brake model Shimano Dura-Ace Di2 R9270 Higher range Shimano Ultegra Di2 R8170

Seatpost SUM specific (included with frameset) SUM specific (included with frameset)

Prices

Each model's retailers, delivered to your country, and their prices over time.

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v

Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v

Character

Sum Pro Shimano Dura-ace Di2 R9250 12v · Road bike average gearing, very high equipment.
Sum Pro Shimano Ultegra Di2 R8150 12v · Road bike average gearing, very high equipment.

Gearing

Speed in the lowest and the highest gear at 90 rpm: lower on the left climbs easier, higher on the right goes faster.

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v14 km/h - 54 km/h
Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v14 km/h - 54 km/h

Easiest gear (climbing)Hardest gear (descending)

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12vArgon 18 Sum Pro Shimano Ultegra Di2 R8150 12v

Components and specs

Every spec line by line; the higher range of a component is marked. The technical groups are folded.

Ride type

Ride type Aero

As printed

Pro Lightweight Aero Race Bike

Aero

As printed

Pro Lightweight Aero Race Bike

Frame and fork

Max tyre clearance 32 mm 32 mm

Bottom bracket CeramicSpeed BB86 Shimano Coated CeramicSpeed BB86 Shimano Coated

Cable routing Fully integrated

As printed

Integrated Cables: Yes

Fully integrated

As printed

Integrated Cables: Yes

Drivetrain4 differences

Groupset brand Shimano

As printed

Shimano Dura-Ace Di2 R9250

Shimano

As printed

Shimano Ultegra Di2 R8150

Shifting Electronic, wired

As printed

Shifters: Shimano Dura-Ace Di2 R9270

Electronic, wired

As printed

Shifters: Shimano Ultegra Di2 R8170

Chainrings 2 ^{°Value not published by the brand} 2 ^{°Value not published by the brand}

Gears at the back 12 ^{°Value not published by the brand} 12 ^{°Value not published by the brand}

Chainring teeth Shimano Dura-Ace R9200 52/36 Higher range Shimano Ultegra R8100 52/36

Cassette Shimano Dura Ace CS-R9200 11-30 Higher range Shimano Ultegra CS-R8100 11-30

Rear derailleur Shimano Dura-Ace Di2 R9250 ^{°Value not published by the brand}Higher range Shimano Ultegra Di2 R8150 ^{°Value not published by the brand}

Shifters Shimano Dura-Ace Di2 R9270 ^{°Value not published by the brand}Higher range Shimano Ultegra Di2 R8170 ^{°Value not published by the brand}

Brakes

Brakes Hydraulic disc ^{°Value not published by the brand}

As printed

Shimano Dura-Ace Disque hydraulique

Hydraulic disc ^{°Value not published by the brand}

As printed

Shimano Ultegra Disque hydraulique

Front rotor 160 mm 160 mm

Rear rotor 140 mm 140 mm

Wheels and tyres1 difference

Wheel size 700c / 29" ^{°Value not published by the brand} 700c / 29" ^{°Value not published by the brand}

Rims Carbon ^{°Value not published by the brand} Carbon ^{°Value not published by the brand}

Tyres Challenge Criterium RS TLR 28c Black Vittoria Corsa Pro TLR 28c

Tyre width fitted 28 mm 28 mm

Cockpit and seatpost

Handlebar Ciclovation LEATHER TOUCH Tornado Gloss ^{°Value not published by the brand} Ciclovation LEATHER TOUCH Tornado Gloss ^{°Value not published by the brand}

Seatpost model SUM specific (included with frameset) ^{°Value not published by the brand} SUM specific (included with frameset) ^{°Value not published by the brand}

° Value not published by the brand

Where to buy them

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v
Its full spec sheet Compare the whole Argon 18 Sum range
Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v
Its full spec sheet Compare the whole Argon 18 Sum range

Compare the whole Argon 18 Sum range

Frequently asked questions

What groupset do Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v and Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v come with?

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v: Shimano Dura-Ace Di2. Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v: Shimano Ultegra Di2.

Compare other models

Argon 18 Sum Pro Shimano Dura-ace Di2 R9250 12v vs Argon 18 Sum Pro Shimano Ultegra Di2 R8150 12v

At a glance

Prices

Character

Gearing

Components and specs

Where to buy them

Frequently asked questions

Other comparisons