The pinnacle ramin 3plus takes the big wheel benefits of a 29er but throws in even more traction stability and volume from the 650b tyres the frame is based on the 29er ramin with increased clearance for the wider tyres utilising an eccentric bb offers a variety of potential changes and upgrades adjustment of bb drop for putting your old 29er wheels in chain tensioning for single speed or hub gear or just fine tuning the ride feel if its fully laden with gear