Chain adjust tool, effcient to prevent the chain fall for flabby that improve the safety of driving abrasion resistant and durable, greatly improving the tire's inadequacies
Specially designed with the swing arm; the chain then runs over it to keep it aligned
Inner diameter: 10mm, can also be used on gas petrol motorized bicycle conversions kits
This Pulley Chain Roller is made from the high quality materials, sturdy and durable for long time service
The chain roller wheel complete with heavy duty bearings very easy to use
