HJC RPHA 70 Carbon Road Test + Video

HJC RPHA 70 Carbon Road Test + Video

The HJC RPHA 70 Carbon is the latest in a long line of well-respected sport-touring helmets from HJC that has received a recent face lift. So, we’ll be seeing if it lives up to its pedigree by taking it out on our road test where we’ll measure data on the helmet to bring you the facts.

HJC RPHA 70 Carbon Road Test + Video

The HJC RPHA 70 Carbon (known as the HJC RPHA 70 ST Carbon in the US) is, in a lot of ways, very similar to its complement, the HJC RPHA 70. The helmets are both coming with the same aerodynamic design, numerous vents, and drop-down sun visor. Nonetheless, there are some differences between the two that do go beyond just different outer shell constructions, and we’ll be road testing the HJC RPHA70 Carbon anyway just to be sure.




If you do have more questions about the helmet though, we also have a separate video review for the RPHA 70 and for comparing the two helmets. So, the RPHA 70 Carbon is coming at a recommended retail price of about 530 Euros or 625 USD, which is actually the same price as the HCJ RPHA 11 Carbon and is only 130 Euros more than the normal RPHA 70. And this means that the helmet will be competing with the Shoei GT Air 2, Arai Profile-V, Shark Spartan GT Carbon, AGV K6, and the X-Lite X-903 Ultra Carbon.


HJC RPHA 70 Carbon Specs

Now, I’ll just run you through a few quick specs on the new RPHA entry. As the name implies, the helmet is made of HJC’s PIM Plus Carbon fiber outer shell material. PIM here stands for premium integrated matrix, and HJC have increased the carbon content to reduce the helmet’s weight even further. This means that it is even better suited to a variety of rides, from quick commutes to cross country cruises. The helmet is produced in 3 outer shell sizes for a more proportional fit and it is ECE 22.05 certified. The helmet also does well for weight since it comes in at about 1390 grams, or 3lbs and 1 oz, which is very lightweight and is 30 grams lighter than the regular RPHA 70.


For ventilation, the HJC R PHA 70 Carbon Helmet comes with adjustable vents for maximum air circulation. They are located in the chin, with another dual purpose top vent in the brow, and a large exhaust out the back of the helmet. The face shield of the RPHA 70 comes Pinlock prepared with the anti-fog lens insert in the box. There is also a locking system for added safety as well as a drop down sun visor.


The interior of the helmet is HJC’s multicool interior, which is antibacterial, removable, washable, and prepared for glasses. Also, the fabric provides enhanced moisture wicking performance to round out this supreme sport-touring helmet. The intermediate oval fit helmet fastens with a double D-ring chin strap and though the Carbon version has not been tested by SHARP yet, the non-carbon RPHA 70 earned 3/5 stars from SHARP.


Another important point on the helmet’s liner is that it comes prepared for the HJC Smart 10b or 20b comms system. While the regular RPHA 70 is prepared for the Cardo Packtalk Slim, the Carbon version of the helmet has reserved a battery space for their own helmet, which means you lose the space for the Cardo Packtalk Slim, but you can still mount the Cardo Packtalk Bold, and you can check out the differences in our separate video on the topic.


With the specs over with, we now come to the main part of the video, which is actually seeing how this helmet performs out on the road when measured.


Road Test Setup

Before we break out the data, just a quick reminder for how we set up the helmet for our test. We measured the helmet’s internal temperature in degrees Celsius based on a thermometer between the helmet’s liner and the EPS. For noise, we had decibel meter showing the helmet’s noise level from a microphone placed near our rider’s ear. For day’s airspeed on the helmet, we used an anemometer mounted on the bike. Finally, we performed our test at 130 km/h, or 80 mph, on long stretches of highway.


HJC RPHA 70 Carbon Road Test

When we tested out the HJC RPHA Seventy Carbon, it was a great day for testing with the day’s average airspeed at about 115-120 km/h. Either way, the HJC RPHA 70 Carbon performed excellently for ventilation since the day’s exterior temperature was at about 14 degrees Celsius, or 57 Fahrenheit while the interior temperature of the helmet dropped to just under 14 degrees Celsius, or about 57 Fahrenheit, which shows a massive improvement over the non-carbon HJC RPHA 70, which was 3 degrees hotter in our previous test.


This also means that the helmet now matches up even better against the Shoei GT Air II since it showed the same temperature inside and out. For noise isolation, the helmet fluctuated between 97 and 98 decibels during our test, which is also an excellent result since it means that even with the different outer shell, the RPHA 70 Carbon has kept up the same excellent noise isolation of the RPHA 70. This also means that the RPHA 70 Carbon is still tied with the Shoei GT Air Two for the quietest premium sport touring helmet on the market, beating the AGV K 6, Shark Spartan G T Carbon, and the Arai ProfileV.


On their return, our rider said the HJC RPHA 70 Carbon Motorcycle Helmet was a pure delight to ride in. The helmet was lightweight, well-ventilated, and extremely quiet, as was reflected in the data we gathered. They commented that though they weren’t sure if the RPHA 70 could quite match the Shoei GT Air 2, with the HJC RPHA 70 Carbon they confidently stated that they now found it to be so. HJC have put a lot of hard work into the helmet, and it has clearly paid off. They were also once again impressed with the HJC helmet’s comfort since the liner did match up with the helmet’s premium price point and even comes with emergency quick release cheek pads for extra safety.


Now, we can finally answer the major question of how the HJC RPHA 70 Carbon ranked.


HJC RPHA 70 Carbon Champion Helmets Ranking

For material, with the helmet made of a carbon fiber fiberglass composite in 3 outer shell sizes, the HCJ RPHA 70 Carbon earns 4.5 stars. For weight, with its result of about 1390 grams in a size M, it also earns an excellent 5 stars. For the visor as well, since it offers an excellent field of view, strong seal, and comes with the Pinlock anti-fog insert in the box, it earns 4 stars. For noise, with a result of 97 dB, the RPHA 70 Carbon once again earns 5 stars in this category. For ventilation, with a surprise result of being the same temperature as the outside, the RPHA 70 Carbon earns another 4 stars. Lastly, with its comfortable liner and premium features, the HJC RPHA 70 Carbon earns 4 stars.


Overall, this brings the HJC RPHA 70 Carbon to a total of 4 stars at 20 Euros per star. This is an excellent result since it means that the helmet is coming in with stronger performance than the RPHA 70 while still keeping the Euro per star rating remarkably close since the RPHA 70 came in with 18 Euros per star.

Compared to the other competition, the RPHA 70 Carbon also gave a great showing since its strong performance for ventilation and material has it once again tied with the Shoei GT Air 2, this was unexpected considering the Shoei does rank better for comfort, but this is all based on the data recorded during our test.


If you’d like to learn more about the HJC RPHA 70 Carbon, then make sure to check out ChampionHelmets.com where we have our lowest price guarantee and plenty of bundle deals including an additional visor or discounted communication systems.



That about wraps up the HJC RPHA 70 Carbon. While it keeps all the things about its non-carbon sibling, HJC have still made a couple changes to really differentiate this helmet from the competition and make it an even better sport-touring option.


If you still want to learn more a bout the helmet, then make sure to check out and subscribe to our YouTube channel where we have our HJC RPHA 70 Carbon Road Test Video alongside our other data driven helmet road tests where we bring you the facts.



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