Scott Addict 20 BikeSCOTT Addict 20 The SCOTT Addict 20 is built for riders who want to ride further and longer on tarmac endurance geometry, comfortable position, capable across long day road missions. With Addict Disc HMF Carbon, Addict HMF Disc 1 1 4" 1 1 2" Eccentric Carbon steerer, Shimano 105 Di2 RD R7150 electronic 24 speed and Syncros RP2. 0 Disc 28F 28R, this is a Shimano 105 Di2 endurance carbon road bike. At Mackay Cycles, we see the Addict 20 as a strong