Aluminum shafts. Stiffer than composite classic rollerskis, but very durable and lightweight.
(Measurements below taken by us)
Weight: 2.20 kg/pair
Wheel size: 66x43 mm (width that runs on ground ~43 mm)
Top of frame heigh unweighted: 48mm
Frame Thickness: 22mm
Ground clearance unweighted: 26mm
Note, if you have the new 2022 and newer Salomon S/Max or R10 Nocturne boots, please include a note saying this so we mount the bindings an additional cm further forward as these two boot models have a very long outsole protruding off the backside that needs more room to clear rear fender.