Princeton Blur 633 V4 Disc Brake Rear Wheel

The rear wheel on a road bike operates in aerodynamically different territory than the front. Behind the frame, the drivetrain, and the rider sits a zone of turbulent, disturbed air that no front wheel encounters. Princeton CarbonWorks has been building carbon wheels since 2012 with this distinction at the center of their design philosophy — their product lineup separates front wheels and rear wheels into dedicated, purpose-built designs rather than adapting one form for both positions. The Princeton CarbonWorks Blur 633 V4 Disc Brake Rear Wheel is their aero rear-specific offering: a full carbon disc brake wheel sold as a standalone unit, built for riders who want to spec each wheel position with intention.

The rim is full carbon with a 23mm internal width and a hooked profile. At 23mm internal, the Blur is dimensioned to work optimally with 28mm to 32mm tires — wide enough to let a performance road tire seat and run correctly, allowing lower pressures for better cornering feel and reduced rolling resistance without the tire ballooning beyond the rim's outer edge. Tubeless ready and compatible with inner tubes, the Blur accommodates either setup without requiring a tire type commitment at purchase. The disc brake-only construction matters here: rim brake wheels must reserve material for a braking surface at the rim edge, which forces profile compromises at that point. With disc brakes handling the stopping, the Blur's entire rim depth is available for aerodynamic work.

Freehub compatibility covers the current road market. The Blur 633 V4 is available with Shimano HG11, SRAM XDR, or Campagnolo driver bodies — the three main road groupset families — plus a fourth option for Classified Powershift compatibility. One detail worth flagging on the Classified version: it ships with the compatible freehub driver body, but the Powershift hub internals are sold separately and must be ordered directly from Princeton CarbonWorks. If you're building around the Classified system, confirm the hub internals are sourced and budgeted before placing the wheel order. The driver body alone doesn't unlock the Powershift functionality, and it's a common point of confusion on first-time Classified builds.

At $2,950 to $3,150 depending on freehub and finish, the Blur 633 V4 sits at the top end of the carbon rear wheel market. Princeton CarbonWorks earns that price point through a focused approach: the brand offers a small number of purpose-developed front wheels, two dedicated rear wheels, and a limited selection of matched sets. It's a tight lineup by design, and the Blur reflects that — the V4 designation marks the fourth generation of this wheel, with each iteration refining the carbon layup and rim construction based on field experience. On criteriums, flat road races, and long-distance riding where aerodynamics compound over sustained distance, a rear wheel purpose-built for its aerodynamic environment is the meaningful difference from a symmetric wheelset design. The Blur carries a perfect 5.0 rating across nine reviews on Princeton CarbonWorks' own site.

Ten finish options are available at RA Cycles: Matte Black, Matte White, Gloss Black, Gloss White, Gloss Chrome, Gloss Gold, Matte Lava, Matte Bronze, Gloss Slate, and Gloss Ivy. The range runs from understated to expressive — Matte Black and Matte Bronze for riders who want the wheel to recede into the build, Gloss Chrome and Gloss Gold for those who want the finish to be as deliberate a choice as the carbon layup. Matte Lava and Gloss Ivy are distinctive without being divisive, and both work well across a range of frame colorways. Sold as a standalone rear wheel, the Blur pairs naturally with Princeton CarbonWorks' front wheel lineup for a matched asymmetric set, or integrates cleanly into an existing build where the rear position is the upgrade priority. Thru axle, disc brake only — built for current-generation road and race bikes. Ships in 5–8 business days from RA Cycles.