At 53 mm The Classic Front Load, or CFL for short is the longest stem we make. The CFL still uses the 6 bolt configuration, but the bolts enter in the front. This style is popular for adjustment and installation because the bolts are not hindered by the bars or being underneath. Typically run “drop” style, where the bars are lower than the center of the stem, you can run it either drop or “riser” style, where the bars are higher than the center of the stem. Both Classic Stems fit on any 1/18 fork, and can be run either side up, and NEVER require spacers to clear the frame, that would just be silly.