PROFILE DESIGN GMR 50
Profile Design was founded in 1988 and prides itself on cycling components that are designed for speed. Probably best known for their aero bars, their catalog is robust with performance-oriented components to increase speed, fit and, most important, aerodynamics. While their offerings lean heavily towards triathlon and TT products, there are plenty of road goodies, and the GMR 50 is a perfect example.
The GMR line comes in three depths—a 38mm, 50mm, as well as a 50mm front and 65mm rear combo. All three follow the same aerodynamic profile. Our 50mm test wheels measured 26mm wide. The rim has a 19mm internal width with hook bead and 0.3mm bead ridges for better tubeless reliability. The bed of the rim came pre-taped wall to wall for tubeless and the valves installed.
The rims are laced to Profile’s own alloy straight-pull hubs. The hubs use a Centerlock rotor and 12mm axles. The front has 20 bladed spokes laced in a 2-cross pattern. The rear has 24 bladed spokes and is laced with a 3-cross pattern. The rear hub comes stock with a Shimano hub body that has 21 points of engagement, an XDR version (for SRAM AXS) is available aftermarket. On our scale with valves and tape installed, the front measured 736 grams with the rear at 952 grams. Profile claims a total weight of 1720 grams, but ours measured 32 grams lighter at 1688. It is also to note that Profile has a max recommended rider weight of 220 pounds and max tire pressure of between 70–100 psi depending on tire size.
Weight: 1720 grams