The MOMO Trek R's shape is based on MOMO legendary professional racing steering wheel, the MOD.30. Its flat-bottom design offers more legroom to allow for more comfortable gear shifting in a manual sports car. The Trek R diameter was increased over the MOD.30 from 330mm to 350mm for better street driving applications. The upper and lower grip portions are wrapped in leather while the sides are fitted with black perforated airleather accented by gray stitching. A chrome accent ring surrounds the silver MOMO horn button and extends down the bottom spoke to give the Trek R a feature that cannot be found on any other MOMO steering wheel.