Types of bevel gear employed in rear axles state which is most commonly used?

The most common types of bevel gears used in rear axles are straight bevel gears, spiral bevel gears, and hypoid gears. Among these, hypoid gears are the most widely used due to their ability to provide smoother operation, higher load capacity, and better efficiency compared to the others. Spiral bevel gears also offer advantages in terms of load distribution and reduced noise but are less common than hypoid gears in automotive applications. Straight bevel gears are typically used in simpler, lower-speed applications.