Review: Great for climbing, racing & general riding cycling
These are obviously named for the 30mm depth of the carbon rims, but now the outer width matches at 30mm, which technically makes these square. Square wheels... I approve.
You may well be running particularly low pressures , as these rims are also rated for gravel. I didn't officially test that myself, though many of my local roads feature serious amounts of gravel, more bombholes than a Ukrainian runway and ice damage that looks like an angry yeti did it – they're never salted or gritted. Winter shatters them. The Thirties took quite a pounding over the test period and, even between 75-85psi on road tyres, never flinched, flexed or twanged.
Black Inc uses two types of straight-pull spokes to maximise strength to weight – Sapim CX-Sprints on the drive side and CX-Ray Aero Butted spokes on the other. Though you really can't tell from looking, the CX-Sprints are thicker. The build of our wheels was tight and evenly tensioned, and stayed that way throughout the test.
These wheels stayed spinning very freely on their custom CeramicSpeed bearings and that, in concert with a low overall weight and quick freehub pickup, means they feel very nippy. Stand up and sprint and they respond easily, and without any sense of flex dissipating your energy... certainly I don't have enough power to trouble these.
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