JOMTHAI Sprockets is the world’s leading manufacturer of aftermarket sprockets, constantly raising the industry’s standards for quality and service. We are committed to supplying the most durable, best quality sprocket available in the marketplace worldwide.

Raw Materials


JOMTHAI sprockets are made using only the best available materials. Aviation-grade 7075-T6 aluminium alloy for lightweight competition sprockets, SCM420 chromoly steel alloy for front sprockets, and we are the only sprocket manufacturer using the ultra-durable high carbon C49 steel for rear sprockets.


JOMTHAI Sprockets factory is the largest and most advanced in the world. It is fully equipped with high accuracy machinery, including the latest generation of computer design and CNC computer controlled metal cutting equipment.

JOMTHAI Sprockets are manufactured the right way – by hobbing, machining and drilling. This is the only proven way to achieve the closest of tolerances and the most accurate teeth profiles.

Heat treated and hand finished to perfection, all JOMTHAI sprockets meet or exceed the highest possible quality standards set for the motorcycle industry.
The essence of a high quality sprocket is in the high precision of manufacturing and the inherent quality of the material. Through accurate machining, JOMTHAI ensures maximum durability and performance.

Quality Control


During manufacture, every sprocket goes through up to 25 production stages and 10 individual quality control checks before it is finished.