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Custom Specialized Tarmac SL8

Notes from the builder:

Every ride deserves a bike that pushes you to be better. This custom Specialized Tarmac SL8 is built to chase that feeling — fast, responsive, and dialed for the kind of rides where everything clicks. With the precision of Shimano Ultegra Di2, the speed of Ultegra C50 wheels, and the confident grip of 30mm Continental Grand Prix tires, it’s ready for the long climbs, the breakaways, and the solo miles where you find your best rhythm. Ride it, and see how far you can go.

Colour Satin Blue Onyx/Black
Build Kit Shimano Ultegra Di2
Wheels Shimano Ultegra C50
Tires Continental Grand Prix TR 30mm
Handlebar Roval Rapide
Saddle Shimano Pro Stealth

Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. After eight generations and over two decades of development, it’s more than the fastest Tarmac ever - it’s the world’s fastest race bike. Your legs up for it?

Aerodynamics or lightweight alone don’t win races - speed is what matters. Delivering that speed requires creating an uncompromising combination of aerodynamics, lightweight, stiffness, and compliance. Through race simulations using real world data our Ride Science team knows the Tarmac SL8 is the fastest race bike ever made on the routes that matter - 16.6 seconds faster over 40km, 128 seconds faster over Milan San Remo, 20 seconds faster over the legendary Tourmalet climb.

With massive gains in stiffness-to-weight - an improvement of 33% over the SL7 - the Tarmac SL8 takes legendary handling, aggressive responsiveness and World Championship proven geometry to the next level. The bike is stiffer at the pedals, more precise at the bars, and combines it with a compliant ride in the saddle that sets a new benchmark for race bike comfort.

Every rider, regardless of size, gets the same unprecedented ride quality and handling. In the saddle the Tarmac SL8 delivers 6% more compliance, floating over rough road with a supple feel unique in the high strung world of race bikes. Tarmac’s proven geometry and 32mm tire clearance are identical to the SL7, ensuring easy adaptation and the versatility to run higher volume tires when needed.