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Gifted with the same performance soul as the vaunted 6 Series Madone, the 4.5 offers the durability and value of a Shimano 105/Ultegra mix drivetrain and the silky-smooth ride of a Bontrager Race Lite carbon fork. With a comfort-proven, Performance Fit platform and the energy-saving ride of our proprietary TCT Carbon, 4 Series bikes are the best handling, best fitting, best styled, and best value in their class.
| Frameset | |
|---|---|
| Sizes | 50, 52, 54, 56, 58, 60, 62cm |
| Frame | TCT Carbon, DuoTrap compatible |
| Fork | Bontrager Race Lite, carbon w/E2 aluminum steerer |
| Wheels | |
| Wheels | Bontrager SSR |
| Tires | Bontrager Race Lite, 700x23c |
| Drivetrain | |
| Shifters | Shimano 105 STI, 10 speed |
| Front Derailleur | Shimano 105 |
| Rear Derailleur | Shimano 105 |
| Crank | Shimano R-600 50/34 or R-553 50/39/30 |
| Cassette | Shimano 105 12-27, 10 speed |
| Pedals | n/a |
| Components | |
| Saddle | Bontrager inForm R1 |
| Seat Post | Bontrager Carbon |
| Handlebars | Bontrager SSR VR, 31.8mm |
| Stem | Bontrager Race Lite, 7 degree, 31.8mm |
| Headset | Aheadset w/cartridge bearings, integrated, sealed, alloy; 1-1/8" top, 1.5" bottom |
| Brakeset | Shimano Tiagra w/Shimano 105 STI levers |
