Aerfast.4









Super-fast fork
The Aerfast. 4 fork is wide and aggressive. Built close to the wheel for less air turbulence, a narrow head end that minimises the surface area exposed to the airflow and the so-called camtail, the tear-off edge at the rear of the fork, also creates the effect of better airflow characteristics. Thanks to this design, the 80 mm wide fork is super-fast and makes up a large proportion of the watts saved.

Optimised cockpit
The cockpit, a handlebar/stem unit with fully integrated cables, is as fast as an arrow. It has been designed to be significantly more streamlined. The upper handlebar is wider and the front end is significantly narrower. A bulge on the underside provides additional aerodynamics. The drops are also narrower in diameter. This also has the advantage that the upper and lower links are ergonomically shaped and therefore comfortable to grip.

Not just aerodynamically fast
The 4th generation of the Aerfast utilises all the experience of its predecessors. Sporty to ride, thanks to the aero road bike, typical saddle cant, high riding comfort thanks to the pleasant spring stiffness of the seat post and high stiffness for a direct and fast response to every acceleration and on hills. direct and fast response to every acceleration and on hills. It is impossible to ride slowly with this set-up. The bike simply wants to go forwards.

I'm not good enough to ride such a fast bike...
Yes, you are good enough! Aerodynamic advantages prevail even at low speeds, right up to the start of the next climb. The aero optimisation is particularly noticeable in crosswinds and tailwinds. When the wind hits the bike, a kind of sailing effect is created and further propulsion is generated. The frame stiffness itself, which is characteristic of an aero road bike, also makes the bike noticeably faster. Anyone who loves the feeling of speed can ride the Aerfast. 4!
Your Aerfast.4

Groupset:
Shimano 105 Di2
Shimano 105 Di2
Umwerfer: Shimano 105 Di2
Brems/Schaltgriffe: Shimano 105 Disc Di2 2x12
Bremsen: Shimano 105 Disc RT800 160/160 mm
Kurbel: Shimano 105 50/34
Kette: Shimano 105 12x
Kassette: Shimano 105 12x, 11-34
Frame geometry
Frame Size | ST (mm) | TT (mm) | TT EFF (mm) | HT (mm) | CS (mm) | Stack (mm) | Reach (mm) | ST° (degree) | HT° (degree) | Recommended body height (cm) | Crank length (cm) | Handlebar width/stem length (mm) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
XS | 458 | - | 510 | 85 | 410 | 482 | 362.5 | 73 | 70 | 152 - 166 | 170 | 380/90 |
S | 483 | - | 530 | 100 | 410 | 500 | 377 | 73 | 71 | 164 - 172 | 170 | 400/100 |
M | 508 | - | 550 | 115 | 410 | 522 | 390 | 73 | 72 | 170 - 178 | 172,5 | 420/100 |
L | 531 | - | 565 | 130 | 410 | 538 | 400 | 73 | 73 | 176 - 184 | 172,5 | 420/100 |
XL | 558 | - | 575 | 155 | 410 | 562 | 403 | 73 | 73 | 182 - 190 | 175 | 420/110 |
XXL | 583 | - | 595 | 170 | 410 | 576 | 418 | 73 | 73 | 188 - ... | 175 | 440/120 |
- ST: seat tube length • Sitzrohr (mm)
- TT: top tube length • Oberrohr (mm)
- TT EFF: effective top tube length (mm)
- HT: head tube • Steuerrohr (mm)
- CS: chain stay length • Kettenstrebe (mm)
- F: fork rake (mm)
- Stack: vertical length center bottom bracket to center top head tube (mm)
- Reach: horizontal length center bottom bracket to center top head tube (mm)
- ST°: seat tube angle (degree)
- HT°: head tube angle (degree)

Brake/shift levers: | Shimano 105 Di2 R7100 2x12 |
---|---|
Brakes: | Shimano 105 Di2 160/160mm |
Cassette: | Shimano 105 Di2 12-speed, 11-34 |
Chain: | Shimano 105 12x |
Crank / chainring: | Shimano 105 Di2 50/34 |
Groupset: | Shimano 105 Di2 |
Handlebar/ stem unit: | RBSU Aerfast.4 |
Handlebar tape: | Storck microfibre black |
Inner bearing: | Pressfit™ diameter 41x86.5mm |
Material: | Carbon Fibre Reinforced (CFR)/Unidirectional (UD) |
Saddle: | Selle San Marco Shortfit 2.0 |
Seat post: | Storck Aerfast.4 Carbon |
Tax rate: | Aerfast.4 |
Tyres: | Conti Grand Prix SL black/black fb 28mm |
Frame variant: | Comp |
Groupset: | Shimano 105 Di2 |
Size: | XXL |
Wheelset: | DT Swiss PR1600 Spline 32 |
Suitable recommendations / frame sets
Frame sets
Accessories
Bottles/holder
Care
Pedals
Safety