All new 109 T Hanger trucks have a retro inspired design based on the Stage 1 Independent trucks from 1978. 109s features our newly reworked geometry offering Superior Turning and Stability.109s feature 356 T6 Aluminum T hangers and 6 hole baseplates, 4140 Chromoly Steel Axles and Grade 8 Kingpins.109s have 109mm hangers with 6.9 inch axles and are 55mm tall at center axle.109s are recommended for boards 6.25 to 7.60 inches depending on width and style of wheels. Recommended wheel size without risers is 56 mm and under.