So far, the dimension of the bottom tube (oval tube between the two bottom brackets) was limited by the width of the bottom brackets, 73mm. The new bottom bracket standard BB386 (86mm case width) now makes larger dimensions possible. The now more stable bottom tube makes it possible to eliminate the lateral tube * while still having the same ride quality and lateral stiffness. This leads to a significant reduction in the frame weight. While Santana were making such radical changes to thair frame design they also adopted industry standard 1 1/2″ – 1 1/8″ tapered forks and 31.6mm seatposts so owners can run any stem or seatpost they like
Of course, all Evolution tandems are also available with Santana's Z-Couplers for easy travel with the Safecase case.

The new standard equipment is equipped with the Ultegra 2x11 drivetrain with a gear ratio that is comparable to the previous 3x10 drivetrain. Chainrings 34/50 alternatively (optional) 36/52 or 39/53 and 11-speed cassettes with 11-32 teeth, alternatively 11-40T (11-46T / 11-28 ...) and the rear 10 "disc brake free of extra charge.

Pro components: carbon cranks with timing belts, new Spinergy wheels, carbon handlebars and seat posts, Shimano DI2 drivetrain, and much more ...

* Introduced by Santana in 1983. So far standard for high-quality tandems.