Race face turbine mtb rimthe raceface turbine rim in either 27 5 650b or 29er size is light yet very strong manufactured from 6061 alloy its tubeless ready and has a rim height of 19 5mm outer width of 25mm and inner width of 21mm in almost 15 years of doing business race face has become a global leader in the design manufacturing marketing and distribution of high performance cycling components and apparel features tubeless compatible 6061 alloy sizes available 27 5 650b or 29er