This tyre comes up a few millimeters wider than most aero rims, so drag performance here was expected to drop across all the wheels, as the rim-tyre interface is less well matched.
#Hunt cad pro
Many of our customers are looking to wider 28c tyres for their improved comfort and rolling resistance, so we wanted to compare aerodynamic performance when running a wider Schwalbe Pro One 28c. So what does this mean for the Hunt 50CAD? Well, we think these results back up our own claims that the 50CAD is one of the lowest drag aero wheels for its depth on the market when paired with the Schwalbe Pro One 25c tubeless tyres, and this applies across the range of yaw angles tested here. Additionally, unlike most of the other wheel on test the 303 NSWs are not tubeless ready, so out on the road you'd lose the lower rolling resistance, increased comfort and puncture protection offered by tubeless tyres! The Zipp 303 NSW performed particularly well at the higher yaw angles, but at lower yaw angles it is the highest drag wheel we tested. As the yaw angle increases to 12 degrees and above, we see that the drag values for the 50CAD stays close to most of the other wheels. Looking at the centre of the plot (low yaw angles), we can see that under these conditions, the 50CAD positions itself very well among the wheels tested, coming out with the lowest drag values across most of this range. The plot above shows drag force against yaw angle. To provide a good representation of the yaw angles likely to be experienced at 45kph, we tested over a yaw angle range of ± 20 degrees.įor the first round of testing, we fitted all the wheels with the Schwalbe Pro One 25c tyre, a tyre width which pairs nicely with the rim width of our 50CAD and most of the market-leading aero wheels. The yaw angle, in this case, is 45 degrees (pretty high!) Realistically, you are not usually cycling through 30kph winds, and so the yaw angle is lower than this. The combined effect of your 30kph forward speed, and the 30kph wind from the left, is an effective airflow coming from 45 degrees to your left at a speed of around 42kph (remember your trigonometry lessons from school?). Now imagine that at the same time, there is a wind blowing from exactly 90 degrees to your left, also at 30kph. As a simple example, imagine you are riding at 30kph in a straight line with no wind the air is hitting you directly head-on at 30kph. The yaw angle is the effective direction of airflow hitting the bike/rider, resulting from a combination of riding speed and ambient wind speed/direction. The bike was mounted on a rotating bed, allowing the entire bike to be rotated relative to the wind tunnel flow, simulating a range of yaw angles. The runs were conducted with a wind speed of 45kph (28mph), and the wheels spun up to an equivalent riding rotation (around 356rpm for a 700x25c wheel). Hence, the primary concern was consistency across the runs, and the use of the same rear wheel to isolate the front wheel performance as the control variable. From an aerodynamic standpoint at normal yaw angles, the front wheel is the primary contributor to drag (after the rider), with the rear wheel contributing only a small amount to total drag. The development of a super-wide, disc-specific aerodynamic wheelset is the primary purpose of this project, however, this article pertains specifically to the benchmarking of our existing aerodynamic carbon disc-specific wheelset, the HUNT 50Carbon Aero Disc.įor our testing, we used the class-leading Canyon Aeroad Disc, combined with a rear ENVE 4.5 AR SES wheel across all runs. PLEASE NOTE: This release does not include any prototype results. Read on to find out how the Hunt 50 Carbon Aero Disc wheels with a 25c Schwalbe Pro One tyre produced the lowest drag on test! After much testing and analysis, here is the first release of data following our recent trip to the GST Gesellschaft für Strömungsmeßtechnik mbH ( as used by Canyon), in Southern Germany.
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