Had a closer look to the Bobber Black at my dealer today. It was presented back to back with an original Bobber in his showroom!
First of all I must state: Because I didn't find a convinient upgrade for my weak single rotor brake, I initally was yet thinking about swaping over to the Bobber Black, when it was announced! But for my taste the double rotor on the fat front wheel was much to dominant and it compromised the nice drum brake look of the sinle rotor hub! So I decided to keep my original Bobber, and kept on trying to gain the braking performance of my single rotor setup. And at the end I succeeded with the fat Brembo P4 34/34 Supermoto caliper and finally got the much desired two finger front brake!
Nevertheless: As the bad braking performance of the single rotor front brake was the most criticized point of the original Bobber, and because all the professional reviewers claimed a double disk rotor setup (wrongly thinking this was the only way to get a convinient front brake) this was one of the most important things on Triumph's to do list for their new Bobber version.
So when I jumped on the new Bobber Black the first thing I touched was the front brake lever! I was very interested on it's feel and expected a propper hydraulic ratio cause to the doubled caliper piston area! But to my surprise it didn't feel other than at the original Bobber!!!
A closer look at the main cylinder showed: 5/8
Man, they equipped the Bobber Black with a 5/8 inch main cylinder! Holy crap! Together with the small 28mm caliper pistons of the floating Brembo calipers this gives a hydraulic ratio of 12.4, which is better than on the original Bobber (7.4), but again far away from the desired 15-18 for a dual rotor setup! This is very odd!
If I baught a Bobber Black I would immediately swap the main cylinder over to the mc of the original Bobber, as this would give me a hydraulic ratio of 16, which was close to optimum!