NX Eagle Cassette PG-1230
The PG-1230 NX Eagle 12-Speed Cassette gives you nearly the same range as SRAM's other Eagle cassettes, but it works with normal splined freehub bodies, so there's no need for an XD driver. In order to accommodate this compatibility, there's one less tooth on the smallest cog, which is almost negligible for your top-end gearing. You still get the 50t bailout gear, as well as the PowerGlide II tooth profile and ramp design that work together to provide seamless transitions between gears, but it's made of all steel cogs to keep the cost reasonable and improve durability. The steel construction is so tough that the cassette is rated for E-MTB applications, so it will certainly withstand heavy-duty use and abuse.
DISC BRAKE PAD FOR SHIMANO DEORE M525
837AL Linear Pull Brake Caliper
The Tektro 837AL caliper is a durable and lightweight linear pull brake designed for MTB.