If you39re obsessed with marginal gains and have the wallet to back it up we made s works for you if you39re obsessed with phenomenal performance and still having money left over for a cappuccino at the end of a hard training ride look no further than the tarmac pro disc with ultegra di2 like the s works iterations it features a rider first engineered design that that applies specificity to every tube size and carbon layup for every frame size this creates the optimal balance of rigidi