UNIQUE ERGONOMICS. The ST-R9270 STI levers for hydraulic disc brakes are
characterised accordingly by higher, slightly inwardly inclined horns.
In addition, the clearance between the brake lever and the handlebar has
been slightly increased for an optimal balance between comfort and
control. The shift buttons have also been redesigned to be larger for
easy access from the lower handlebar position, and better spaced to
ensure intuitive operation even when riding with gloves.
LIGHTNING-FAST SHIFTING. Another feature of the disc brake version is
the Wireless functionality, which not only ensures a clean cockpit but
also lightning-fast and precise shifting. Nevertheless, the shift/brake
levers still offer a cable connection (EW-SD300) for the use of
additional shifters in the drops or the top of the handlebar. For
numerous customisation and configuration options, compatibility with the
improved E-Tube Project app, which, like previous versions, allows you
to adjust shift modes (Synchro-/Semi-Synchro-Shift, Multi-Shift), shift
speed and button assignment on the fly.
CONTROLLED BRAKING. But the Dura Ace R9200 Dual Control levers are also
impressive in terms of braking performance. With the help of an extended
brake control range, the Servowave technology ensures excellent dosing
that offers optimum comfort and control even in challenging conditions.
Of course, for individual adjustment, the levers feature the option of
reach and free stroke adjustment.
Synchronized Shifting
Shimano's Synchro-Shift technology simplifies shifting immensely and
significantly reduces the amount of decision-making processes that take
place while riding.
Especially in decisive racing situations or when driving at the limit,
drivers often have to complete a large number of decision-making
processes in addition to the physical strain, which are then frequently
disturbed and lead to wrong decisions. The fewer decision-making
processes there are, the better decisions are made and the more
attention is kept on the race. This is exactly what the Synchro-Shift
technology makes possible, always selecting the optimal next higher or
next lower gear ratio combination, regardless of whether the rear and /
or front derailleur are used for this purpose.
In addition to the conventional manual mode, in which the front and rear
derailleurs are controlled independently of each other, Synchro-Shift
offers two further modes:
Full Synchro-Shift | The front derailleur responds to the shifts made by
the rider on the rear derailleur. Essentially, this means that only one
shift lever with two shifters is needed to shift the rear derailleur
and front derailleur.
Semi Synchro-Shift | The rear derailleur responds to the shifts made by
the rider on the front derailleur. In doing so, the rear derailleur
automatically provides the necessary compensation shifting for low
cadence jumps when shifting up or down at the front derailleur.
SERVOWAVE
Shimano's SERVOWAVE technology improves brake lever's modulation
ability. Because the lever absorbs a lot of braking distance right at
the start of its movement, the brake pads have disc contact more quickly
and it remains more lever travel to adjust braking force. That is why
SERVO WAVE brake systems are characterized by faster response, higher
performance and shorter idle travel.]