BMW S 1000 RR - Uživatelský manuál stáhnout pdf (Strana 12)

BMW

Media

information

09/2014

Page 12

Endowing the new RR with uncompromising super-sports abilities involved

more than just honing the drive technology for maximum performance: the

bike’s supreme riding dynamics are also down in no small part to its chassis

technology par excellence.

New, lighter frame structure offering a superior blend of rigidity and

flexibility for more traction combined with greater precision and

unequivocal feedback.

The centrepiece of the chassis continues to be an aluminium bridge frame

that is welded together from four individual cast pieces, with the engine tilted

forward at an angle of 32 degrees and integrated into it as a load-bearing

element. Prior to being fitted on the new RR, however, the main frame

underwent a redesign and was given a new, lighter rear section.

The trio of main frame, main frame rear section and swingarm were

furthermore re-engineered with a view to optimising the blend of rigidity and

flexibility and thereby boosting traction at the same time as achieving greater

precision and even better feedback.

Refined chassis geometry for even better handling, increased

traction and crystal-clear feedback at the limits of performance.

The overriding objectives when developing the chassis for the new RR were

to further improve rider feedback from the front end, make the bike easier to

handle and increase the mechanical grip of the rear wheel for greater traction.

The steering head angle was therefore increased by 0.5° to 66.5° without any

change in the yoke offset, while the fork overlap of the immersion tubes was

reduced by 6 mm. This resulted in a shortening of the wheel castor by

1.5 mm to 96.5 mm. At the same time, the swingarm pivot point was lowered

by 3 mm and the wheelbase lengthened by 8 mm to 1,425 mm.

The new chassis geometry makes for vastly improved rider feedback from the

front wheel and, as a result, the feel for the front end as a whole. Moreover,

the new S 1000 RR boasts even better handling qualities, handles even more

precisely and offers even more traction and feedback from the rear wheel,

especially when riding at the limit. The handlebar width has been increased

slightly by 5 mm on each side.

3. Chassis.

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BMW S 1000 RR - Uživatelský manuál Strana 12