This is the new Transition Blindside.
There are quite a few changes for the new frame, with travel adjustable between 170mm and 190mm as well as the weight dropping a full pound making it now just 7.6lb (without shock).
Up front there’s now a tapered headtube to accept tapered steerer tubes using a new hydroformed tubeset. The rear derailleur cable is routed through the chainstay for cleaner lines and the swingarm is only compatible with135mm x 10mm setups. A new one-piece bottom bracket now gets CNC machined ISCG 05 tabs.