Review: Galfer Shark Disc Rotors

The nickname “shark” comes from the fins that extend below the curb’s surface, where they are intended to act as heat sinks to aid in further cooling. The rotors are 2mm thick, in line with the trend towards thicker rotors that have recently gained momentum. For example, the SRAM HS2 rotors are 2mm thick, up from the 1.85mm thickness of their previous center rotors. TRP has 2.3mm rotors in its lineup, and Magura has had 2.0mm rotors in its catalog for decades.

The idea is that more material allows for better heat dissipation, and makes the rotors less susceptible to deformation under high temperatures. It’s also less likely to bend a bit when you slip off a skinny or hit a poorly placed rock.

Besides the increased thickness and thickness of the shark’s fin, Galfer worked entirely with a laser cutter and punched out 324 holes and 27 larger holes to aid airflow and remove dust, mud or water from the curb surface. All of these holes also help shave off the weight, although rotors aren’t at the top of my list of places to worry about. The 203mm rotor weighs 180g, 20g lighter than the 200mm SRAM HS2 rotor. There is also a circular slot near the six mounting slots that can be used to hold the speed sensor magnets for riders on e-bikes.

performance

I tested the Shark Disc rotors on several different bikes, all using SRAM’s Code RSC brakes and metallic pads. I was running 2.0mm thick HS2 rotors, so there was no need to reset the caliper pistons to get clearance for the Galfer rotors. This will probably be necessary if you are hitting a 1.8mm rotor, but the process shouldn’t take more than a few minutes. If you are going to replace your pads at the same time, screwing a flat head screwdriver between the old pads should push the pistons all the way in, or if the pads are out, a plastic frame lever can be used to make sure the pistons are fully pulled out.

Compared to the HS2 rotors, the Shark discs have a more snatched initial bite (no pun intended), which will be appreciated by riders looking for an extra ‘oomph’ from their brakes. Although the width is nearly identical to the HS2, the Shark Disc’s design allows it to grip more firmly upon first contact with the pads – similar to the difference in initial feel between the metallic and organic brake pads.

The rotors stayed quiet and consistent on long, steep, dusty slopes, including those that required long bouts of heavy braking. Conditions this summer have been very dry, but on the few occasions I’ve ridden I’ve tried shark discs in the rain they made a small noise for the water to clear and then stay silent afterwards – I didn’t find them very loud.

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