Description
This Birel ART rear axle is built to the 30 mm diameter, 5 mm wall thickness, and 960 mm length specification used on select Birel ART chassis. Axle choice plays a key role in rear grip, kart balance, and overall handling, making correct sizing and hardness selection important for consistent performance.
The Yellow axle is typically chosen when a balanced level of stiffness is required without moving to the extremes of very soft or very hard options. Rather than dramatically changing kart behavior, it is commonly used to fine-tune rear grip and response based on track conditions and driver preference.
Axle fitment is strictly dimension-based. Before ordering, confirm that the diameter, wall thickness, and length match your existing axle to ensure proper installation and alignment.


