4G Primo
Our top of the range 4G chassis features a 3K monocoquecarbon fibre composite frame and 3K carbon fibre composite forks with our TaperPro 1.25" x 1.5" tapered carbon fibre composite steerer tube.
The 4G also features sensible aerodynamic touches that work out in the real world. Aero fork blades not only reduce drag, but also condition the air that then goes on to flow over the rest of the bike. An aero seat tube and seat post further reduce drag, without compromising the outstanding levels of performance.
A forged aluminium alloy CNC machined replaceable rear derailleur hanger not only prevents frame damage in the event of a crash, but also delivers the stiffness needed for precise gear shifting. Our bottom bracket threads are put in place by an in-line bore and thread machine.
This results in the bottom bracket threads being perfectly parallel to each other, meaning that the bearings are parallel. This in turn gives you longer bearing life and less drag for better drive-train efficiency.
GALLERY 1 of 14
This bike is designed and engineered for racing. It's a no compromise chassis that was designed to give the ultimate in efficiency. If you want to go fast, stay fast, and then go a little bit faster, the 4G is for you.
4G Primo Si 5.5 (Ultegra)
Matt Grey Frame with Gloss Black Decal
Frameset
Frame
Monocoque carbon frame - integrated cable routing - Di2 Ready
Fork
Carbon aero blades and steerer
Sizes
48, 50, 52, 54, 56, 59cm
Wheelset
Tyres
Continental 700X23C Ultra Sport Black
Rim
Mavic CXP 22
Hub
Drivetrain
Shifters
Ultegra 20 Speed
Front Derailleur
Ultegra 20 Speed
Rear Derailleur
Ultegra 20 Speed
Crank
Ultegra Compact 50 / 34 or 53 / 39 - 172.5
Cassette
Shimano 10-SPEED 11-12-13-14-15-17-19-21-23-25T
Chain
KMC Silver 10 speed
Components
Saddle
Fizik Arione
Seatpost
ICE Carbon Aero
Handlebar
Ritchey LOGIC CURVE COMP
Stem
Ritchey LOGIC COMP
Headset
Nico aluminum / Steel intergated
Brakeset
ICE Dual Pivot Brakes
Accessories
Tape
Velo Gel Tape
4G Primo Si 6.0 (Ultegra Di2)
Gloss Black with Matt Black Decals
Frameset
Frame
Monocoque carbon frame - integrated cable routing - Di2 Ready
Fork
Carbon aero blades and steerer
Sizes
48, 50, 52, 54, 56, 59cm
Wheelset
Tyres
Continental 700X23C Ultra Sport Black
Rim
Mavic CXP 23
Hub
Drivetrain
Shifters
Ultegra-Di2 20 Speed
Front Derailleur
Ultegra-Di2 20 Speed
Rear Derailleur
Ultegra-Di2 20 Speed
Crank
Ultegra Compact 50 / 34 or 53 / 39 - 172.5
Cassette
Shimano 10-SPEED 11-12-13-14-15-17-19-21-23-25T
Chain
KMC Silver 10 speed
Components
Saddle
Fizik Arione
Seatpost
ICE Carbon Aero
Handlebar
Ritchey LOGIC CURVE COMP
Stem
Ritchey LOGIC COMP
Headset
Nico aluminum / Steel intergated
Brakeset
ICE Dual Pivot Brakes
Accessories
Tape
Velo Gel Tape
4G Primo Si 6.5 (Dura ace)
Matt Black with Gloss Black Decals
Frameset
Frame
Monocoque carbon frame - integrated cable routing - Di2 Ready
Fork
Carbon aero blades and steerer
Sizes
48, 50, 52, 54, 56, 59cm
Wheelset
Tyres
Continental 700X23C Ultra Sport Black
Rim
Mavic AKSIUM Black M10
Hub
Drivetrain
Shifters
DURA ACE
Front Derailleur
DURA ACE
Rear Derailleur
DURA ACE
Crank
DURA ACE Comapct 50 / 34 or 53 / 39 - 172.5
Cassette
Shimano 10-SPEED 11-12-13-14-15-17-19-21-23-25T
Chain
KMC Silver 10 speed
Components
Saddle
Fizik Arione
Seatpost
Ritchey LOGIC COMP
Handlebar
Ritchey LOGIC CURVE COMP
Stem
Ritchey LOGIC COMP
Headset
Nico aluminum / Steel intergated
Brakeset
TEKTRO Dual Pivot Brakes
4G Primo Si 7.5 (Dura ace Di2)
COMING SOON
Frameset
Frame
Monocoque carbon frame - integrated cable routing - Di2 Ready
Fork
Carbon aero blades and steerer
Sizes
48, 50, 52, 54, 56, 59cm
Wheelset
Tyres
Continental 700X23C Ultra Sport Black
Rim
Mavic AKSIUM Black M10
Hub
Drivetrain
Shifters
DURA ACE
Front Derailleur
DURA ACE
Rear Derailleur
DURA ACE
Crank
DURA ACE Comapct 50 / 34 or 53 / 39 - 172.5
Cassette
Shimano 10-SPEED 11-12-13-14-15-17-19-21-23-25T
Chain
KMC Silver 10 speed
Components
Saddle
Fizik Arione
Seatpost
Ritchey LOGIC COMP
Handlebar
Ritchey LOGIC CURVE COMP
Stem
Ritchey LOGIC COMP
Headset
Nico aluminum / Steel intergated
Brakeset
TEKTRO Dual Pivot Brakes