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Argon 18 Sum Shimano Ultegra Di2 R8150 12v vs Argon 18 Sum SRAM Force AXS E1 12v

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

Argon 18

Sum Shimano Ultegra Di2 R8150 12v

Argon 18 Sum SRAM Force AXS E1 12v, side view

Argon 18

Sum SRAM Force AXS E1 12v

Top of the rangeAeroCarbon700c2026
Top of the rangeAeroCarbon700c2026

Two builds of the Argon 18 Sum line: 9 differences, mostly in the components.

Argon 18 Sum Shimano Ultegra Di2 R8150 12v, side viewArgon 18Argon 18 Sum Shimano Ultegra Di2 R8150 12v
Argon 18 Sum SRAM Force AXS E1 12v, side viewArgon 18Argon 18 Sum SRAM Force AXS E1 12v

At a glance

  • Argon 18 Sum SRAM Force AXS E1 12v has the shorter lowest gear: 12 km/h at 90 rpm, against 14 km/h.
Key specs2 differences
Model yearSame for all 2026 2026
FrameSame for all Carbon
As printed

optimize frame topology and carbon layup

 Carbon
As printed

optimize frame topology and carbon layup

WheelsetSame for all 700c · Scope R4 700c · Scope R4
DrivetrainSame for all 2×12 2×12
Groupset Shimano Ultegra Di2
As printed

Rear Derailleur: Shimano Ultegra Di2 R8150

 SRAM Force AXS E1
As printed

Rear Derailleur: SRAM Force AXS E1

Brake model Shimano Ultegra Di2 R8170 SRAM Force AXS
SeatpostSame for all SUM specific SUM specific

Prices

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

Argon 18 Sum Shimano Ultegra Di2 R8150 12v

Argon 18 Sum Shimano Ultegra Di2 R8150 12v

Argon 18 Sum SRAM Force AXS E1 12v

Argon 18 Sum SRAM Force AXS E1 12v

Character

  • Sum Shimano Ultegra Di2 R8150 12v · Road bike average gearing, very high equipment.
  • Sum SRAM Force AXS E1 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 Shimano Ultegra Di2 R8150 12v14 km/h - 54 km/h
  • Argon 18 Sum SRAM Force AXS E1 12v12 km/h - 55 km/h
Easiest gear (climbing)Hardest gear (descending)
Argon 18 Sum Shimano Ultegra Di2 R8150 12vArgon 18 Sum SRAM Force AXS E1 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 typeSame for all Aero
As printed

Best Lightweight Aero Road Bike

 Aero
As printed

Best Lightweight Aero Road Bike

Frame and fork1 difference
Max tyre clearanceSame for all 32 mm 32 mm
Bottom bracket BB Ultegra SM-BB72 SRAM DUB PF 86.5 Road
Cable routingSame for all Fully integrated
As printed

Integrated Cables: Yes

 Fully integrated
As printed

Integrated Cables: Yes

Drivetrain6 differences
Groupset brand Shimano
As printed

Shimano Ultegra Di2 R8150

 SRAM
As printed

Front Derailleur: SRAM Force AXS E1

Shifting Electronic, wired
As printed

Shifters: Shimano Ultegra Di2 R8170

 Electronic, wireless
As printed

Shifters: SRAM Force AXS E1

ChainringsSame for all 2 °Value not published by the brand 2 °Value not published by the brand
Gears at the backSame for all 12 °Value not published by the brand 12
Chainring teeth Shimano Ultegra R8100 52/36 SRAM Force AXS Powermeter 48/35 Higher range
Cassette Shimano Ultegra CS-R8100 11-30 SRAM XG 1270 10-33 XDR
Rear derailleur Shimano Ultegra Di2 R8150 °Value not published by the brand SRAM Force AXS E1 °Value not published by the brand
Shifters Shimano Ultegra Di2 R8170 °Value not published by the brand SRAM Force AXS °Value not published by the brand
Power meter fitted–Not given yes
Brakes
BrakesSame for all Hydraulic disc °Value not published by the brand
As printed

Shimano Ultegra Disque hydraulique

 Hydraulic disc °Value not published by the brand
As printed

SRAM Force Disque hydraulique

Front rotorSame for all 160 mm 160 mm
Rear rotorSame for all 140 mm 140 mm
Wheels and tyres
Wheel sizeSame for all 700c / 29" °Value not published by the brand 700c / 29" °Value not published by the brand
RimsSame for all Carbon °Value not published by the brand Carbon °Value not published by the brand
TyresSame for all Vittoria Corsa N.EXT TLR 28mm Vittoria Corsa N.EXT TLR 28mm
Tyre width fittedSame for all 28 mm 28 mm
Cockpit and seatpost
HandlebarSame for all Ciclovation LEATHER TOUCH Tornado Gloss °Value not published by the brand Ciclovation LEATHER TOUCH Tornado Gloss °Value not published by the brand
StemSame for all FSA SMR-II °Value not published by the brand FSA SMR-II °Value not published by the brand
Seatpost modelSame for all SUM specific °Value not published by the brand SUM specific °Value not published by the brand

° Value not published by the brand

Where to buy them

Compare the whole Argon 18 Sum range

Frequently asked questions

What groupset do Argon 18 Sum Shimano Ultegra Di2 R8150 12v and Argon 18 Sum SRAM Force AXS E1 12v come with?

Argon 18 Sum Shimano Ultegra Di2 R8150 12v: Shimano Ultegra Di2. Argon 18 Sum SRAM Force AXS E1 12v: SRAM Force AXS E1.

Other comparisons

Compare other models