Saw these on pinkbike and the all metal ones look reasonable?
Crank Brothers' fresh 5050 platform pedal is completely new from the ground up, sharing next to nothing with the original version. Using a unique two piece design that employs different materials - aluminum for the platform's outer section and polycarbonate for the inner - these novel pedals are quite different from other options on the market. There are two versions available: a 428 gram, black and silver version that retails for $80 USD and spins on a combination of a bushings and cartridge bearings, and a black and red, 433 gram model that features a body with more cutouts to shed both weight and mud, as well as rotating on both needle and cartridge bearings. Both models come from Crank Brothers with a five year warranty. Crank Brothers' 5050 pedals are not an evolution of the original model, but rather a completely new design. The most obvious difference between the old and new models is the body, with the 2012 version being a hybrid that uses a polycarbonate inner section combined with a more traditional aluminum outer segment. The question is, why mix the two materials? Crank Brothers says that the polycarbonate is lighter than the aluminum that it replaces, while still being very resilient to abuse that it would see while attached to the crank arms of a downhill bike. Even if it is lighter, it would no doubt incur damage in short order if the entire pedal was made from polycarbonate, which is why the outer section, the part of the pedal that is likely to strike the ground, is still made from aluminum. Two torx bolts hold the two sections together, making them easy to replace if the worst does happen. Total pedal height for the new model is 5mm slimmer than the original version.
The new pedals are also drastically different internally, with both models using a forged scm435 chromoly spindle that Crank Brothers claims is 50% stronger thanks to a new shape that can better handle high loads. The new two piece body is also far better sealed against the elements than the original design which should greatly extend bearing life. Traction is provided by 10 set screw pins on each side, all being adjustable in height to allow you to fine tune the grip to your liking.