BOLLY CARBON UNDERCARRIAGES QM 21PYLON FLAT PLATE STYLE( wheel pants NOT included ) Bolly Composite Undercarriages are built from a high temperature epoxy (they will not wilt on a hot day), and combinations of (primarily) Carbon Fibre plus where appropriate some Glass & Aramid fibres. The construction is predominately via rovings running lengthwise with cloth reinforcement in the bolt areas. Such a construction method isn't the prettiest, but it is the most effective. Thin and airfoiled for low drag, although several smaller UC are flat plate style with rounded edges. Note : It is quite OK to cut our F3A gear in half and space apart to fit different fuselage widths. A=36mm fuselage width, B=238mm track, C=45mm height (axle to fuselage), D=24mm width @ top, E=41mm width @ foot, F=0.0mm sweepback.