WHAT Performance-optimized frame design,
featuring innovative structures like
our proprietary one-piece chainstay/
BB, internal ribbing, and hollow carbon
dropouts and headset cups.
WHY Optimizes weight and stiffness in
every part of the frame for greater
acceleration, efficiency, and handling.
HOW The one-piece chainstay/BB design resists
deflection under extreme pedal loads
for improved power transfer. Internally
raised ribs at the BB and head tube use
optimized fiber alignment to increase
stiffness. And hollow dropouts and
headset cups cut weight to a minimum.
Carbon Seatstays with
WHAT Seatstays specially molded to utilize new
WHY Increases rear-end compliance and
reduces rider fatigue, while shaving weight.
HOW A new seatstay design allows us to use
less carbon fiber in the layup and pull the
In-Zertz into the carbon cavity to eliminate
vibration. Zertz inserts are also used in the
seatpost and fork to help mute vibration.
Internal Cable Routing
WHAT Fully internal cable routing for brake
and shifter cables on all SL3 bikes.
Compatible with standard and
WHY Maintains clean design lines and keeps
grit and grime from affecting shifting and
HOW Cables are routed from the handlebars
through the frame and exit at the top tube,
BB, and chainstay. Back cable guides are
removable for easier maintenance.
WHAT Strategic surface shaping of the head
tube/top tube/down tube junction,
designed to optimize specific ride
WHY Improves torsional stiffness, while
maintaining the appropriate level
of compliance for the Endurance
HOW By manipulating the geometry of this
junction, we make gains in stiffness
without having to use an overly stiff fiber
that would sacrifice vertical compliance.
Widening the top tube and down tube
eliminates flat spots behind the head
tube for greater frame stiffness.