S-Works Tarmac SL9 - Shimano Dura-Ace Di2 Kids And the optimized chassis boasts

And the optimized chassis boasts 150mm of custom-tuned rear suspension and adjustable geometry that delivers a stable and natural ride like no other

or but's about that—but it represents so much more than just aerodynamic prowess

Additionally

up to 20mph/32kph

S-Works Tarmac SL9 - Shimano Dura-Ace Di2 Kids And the optimized chassis boastsThe all new S Works Tarmac SL9 is the fastest road bike ever made. Not just because its the lightest. Not just because its our most aero. Not because it handles better than anything else on the road. But because it delivers the lowest real world Time to Finish of any road bike ever made. Tarmac SL9 turns more of your effort into pure speedvalidated for real race courses, real terrain, real riders. When the goal is to cross the line first, no road bike