ProX is not a company that is widely known for it’s carbon offerings but it’s sister brand LightCarbon is frequently mentioned on the usual web forums when it comes to bike frames at affordable prices. ProX is a Chinese company based in Xiamen and all orders are fulfilled directly from there. From dispatch they took about a week to travel to Europe for review. ProX originally sold via OEM channels but have recently started selling directly to the consumer, this is a change that is sweeping across the market.
The headline statistic on these wheels is the price. $389 (this will vary depending on local taxes and where you live) is firmly at the budget end of carbon wheel territory and at the time of writing it was the cheapest available and undercut several aluminium alternatives.
The hubs are a generic far eastern unit. The hubs use a blanket 15267 bearing on every landing. This does make ordering replacements easy and means that ProX have a smaller parts bin but the size is not ISO or JIS standardized. Hence, any replacement will be difficult to get from a tier 1 bearing supplier (SKF, NTN, FAG, NSK etc). The overall fit and function of the hub is good. The bearing fits were all very good and the use of CN clearance bearings means the bearing friction was low.
After 1000km of use, the bearings did not exhibit any indications of impending failure.
The hubs feature a 6 pawl ratchet engagement, the pawls and springs are held captive by an additional plastic cover plate that is an interference onto the edge of the freehub. This is a good design feature as it prevents the pawls falling out during disassembly.
The residual imbalance was low, slightly over 410g.mm, the limit value being 610g.mm
High imbalance values are associated with premature bearing failure and a tendency to cause the speed wobble at speeds in excess of 40kph
The wheel rim is shallow and thus the crosswind stability is very good. The likelihood of any twitching would require an extremely blustery day.
The rim construction is robust, the carbon is much thicker than a lot of wheels. It measures at 38mm deep. Internally, the wheel rims show little evidence of layer displacement and no visible tenting was observed. A baseline Ultrasonic check did not show any voids.
The rim periphery uses a slit brake track, this is extremely effective in inclement weather wear the initial bite of the brake pads is much better than traditional flat brake tracks.
Internally, the rims are very lean, there is little evidence of tenting or layer displacement. This is coupled with a much thicker wall thickness of carbon.
There is not really much wrong with the wheels. They are firmly aimed at the cost conscious racer and the only real compromise is the weight, the thicker carbon will hinder anyone who wants to accelerate quickly or go up hills. The hubs are of reasonable quality. The spokes are of proven design and provenance. The rim construction is well above average. If you are on a budget or want a robust set of training wheels, the ProX wheelset does represent a good offering.
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You can watch the full review on Youtube here