The RPHA 70 ST is HJC’s newest sport-touring lid.

HJC makes a lot of helmets–more than one million per year in four factories in South Korea and Vietnam, according to the company website. At the upper end of its product range is the RPHA lineup (Revolutionary Performance Helmet Advanced, pronounced “are-fah”), which includes two sport-touring helmets and two street/racing helmets. The RPHA 70 ST is the newer of the two sport-touring models, and there?s much to like about this sharp-looking lid. 

The shell is made from HJC?s P.I.M. Plus, which comprises several layers of aramid, fiberglass and carbon material. A large central vent up top is easy to adjust into one of its three positions with gloves on, and two rear exhaust vents are small but also fairly easy to use. The scratch-resistant, tool-free, Pinlock-ready shield has a central open/close latch that trades sleekness for functionality–fine for a sport-touring lid–but I wish it had a slightly larger initial “vent” opening.
The integrated drop-down sun shield is also easy to use via the slider at the bottom of the chinbar. I installed a Sena 10C Pro Bluetooth communicator/action camera on my RPHA 70 ST, and the speakers were a snap to position thanks to the helmet?s large recesses that came with soft “loop” fabric ready for the “hooks” on the backs of the Sena?s speakers.

I?m usually a size small, and my RPHA 70 ST?s fit around the chee...