The RT4100HR is a standard-sized fiberglass race seat equipped with head restraint wings for enhanced safety. We have focused on achieving a lightweight seat shell with optimized geometry. Our patented back-mounted technology has trickled down from the 119 and 129 Series, giving you the option of bolting the back of the seat to the roll cage at shoulder level. Large harness guides and a removable molded base cushion allow a range of drivers of varying heights to fit. Breathable Spacer fabric, parallel sides, and pronounced thigh support round off the features of this accomplished motorsport seat. For the larger driver, the RT4100WTHR is 60mm taller and 40mm wider and for those wanting a seat without head restraints, our RT4100 and RT4100WT complete the 4100 Series.