The time and effort that goes into the schwalbe pro one ht tubular road tyre is unlike regular bicycle tyre production schwalbe has a new factory exclusively for manufacturing the schwalbe pro one ht tubular road tyre and carefully selects its skilled employees to by hand glue and stitch each section together with the carcass of the pro one ht tubular road tyre being made with a polyester and cotton mixture provides an incredibly low rolling resistance and high pinch flat protect