Sram pcex1 10 speed e mtb chainthis sram pc ex1 10 speed has been specifically designed for the extra demands that e mtb bikes put on the chain it is much wider and stronger than conventional chains and features chrome hardened solid pins and nickel plated outer links for extra durability its ideal for the high torque and heavy duty use that it will encounter and is engineered to compliment srams e bike ex1 groupset for a smooth operation and efficient shifting features 1x specific chain s