How many pistons: These are the 4 piston version

On a Trail bike they work great as a front tyre teamed up with something like the Maxxis Ardent on the back

Stand out features: The 'stainless steel - aluminium - stainless steel' floating rotor construction dissipates heat very well

The all-new Air Support Pro Back Panel is comfortable and efficient

Industry Nine Enduro S Carbon Wheelset - XD Driver - Black - F-15x110mm Boost R-12x148mm Boost - 6 Bolt - Front and Rear - 29 Inch PDP|Colour How many pistons: These areThe Hydra S Carbon series represents a long standing call from riders looking to pair the lively and durable Hydra S hub platform with our proven carbon rim technology. At the heart of the Hydra S Carbon family lies the insanely fast engaging Hydra laced to 28 straight pull steel spokes. Industry Nine's 31mm carbon rim features hookless technology that mates with modern aggressive tyres capable of handling the most demanding conditions. Who's this