With its race-optimised, FACT IS carbon frame, efficient handling, and increased 19% stiffness-to-weight ratio over the previous Tour de France-winning version, the TARMAC SL4 has plenty of Pro-Tour proven speed up its sleeve. Simply put: nothing is lighter and stiffer. That’s why it’s the go-to choice of the pro peloton. Ride it hard, ride it fast, just wind yourself up and go.
WHAT High modulus carbon frame made from our most advanced carbon construction method.
WHY Gives our Tarmac the highest stiffness-to-weight ratio ever—19% greater than 2011 S-Works—which makes for an insanely light and fast bike.
HOW Divides frame into four monocoque sections
(plus dropouts)—with carbon fibers running
continuously from tube to tube within each section—for more precise optimization of tubes shapes, sizes, and joints.
WHAT Entire Tarmac family borrows technologies
from the top-end, Pro Tour-winning S-Works models.
WHY Increases performance and overall value in every Tarmac we make. Allows all riders to enjoy technology exclusively found on pro team-level bikes a year or two prior.
HOW Each year advancements from pre-
vious S-Works models trickle down to lower level bikes. For instance all frames use FACT IS construction—
our most advanced carbon construction method—
featuring triangulated seatstays, tapered head tube assemblies, and oversized tube sets for torsional stiffness and light weight.
TAPERED, SHAPED HEAD TUBE
WHAT Strategically designed head tube
on SL4 frames tapers from 1-1/8” at the
top to 1-3/8” at the crown and facilitates massive top and down tube junctions.
WHY Increases strength and stiffness for greater steering precision and res
HOW The wider base creates a stiffer, stronger junction, and the gradual transition of carbon fiber from top to bottom eliminates the potential for weak spots due to sharp angles—carbon is at its best when it keeps a smooth line. Uber-oversized top and down tubes “wrap” around the front of the head tube, creating the utlra-stiff “bulges” at the junctions. The design requires a smaller lower bearing (compared to last year’s 1-1/2”) which saves weight.
WHAT FACT IS construction with bottom bracket and chainstays constructed as
one piece on on most frame levels.
WHY Optimizes weight and stiffness in
one of the most critical and highest-stress areas of the frame for superior acceleration, efficiency, and handling.
HOW The BB and chainstays are molded together creating a single unit, rather than bonded together
after molding, along with the carbon BB shell. This results in a super strong and stiff unit: seamless from the BB to the dropouts, eliminating
potentially weak junctions. This design resists deflection under extreme pedal loads for improved power transfer.