Yokomo MX4 MR4BC 84T 48P Spur Gear. Come with a thinner teeth wall for less clutter inside the rear bulkhead case. Will work on slipper and none-slipper layshaft setups. Available in both black and white; Select preference at checkout.
Compatible with Yokomo MX4, MR4BC, MT, and TC RC models.
 
Made of durable POM material and an excellent replacement for worn Yokomo ZM-S84 spur gears.