Avid Gear Lightweight Intermediate RC10 B7 AV10257-N

The AVID B7 MachLite Idler Gear 54T is a Gear lightweight idler gear designed for Stock and Spec drivers looking to minimize rotating mass in the drivetrain. AVID has reduced the tooth width from 10 to just 6 mm, resulting in a weight of only 3.34 g—24% less than the original Gear. This reduction in mass and inertia promotes a faster transmission response. Precision-machined from self-lubricating plastic, the MachLite 54T is designed to deliver smooth, consistent rotation. Despite its lighter weight, its 54-tooth design maintains sufficient strength for use in the Modified class. It directly replaces part number Team Associated ASC71216 and fits into several AE transmissions that use a 54T intermediate Gear.

⚙️ Technical Specifications

• Type: Gear intermediate gear 
• Number of teeth: 54T
• Developed primarily for the Stock and Spec classes
• Width reduced from 10 mm to 6 mm
• Weight: 3.34 g
• 24% lighter than the original Gear
• Reduced rotational mass
• Reduced inertia for faster transmission response
• Precision-machined for smooth rotation
• Made of self-lubricating plastic
• 54T design maintains sufficient strength for Modified use
• Uses standard 10 x 15 x 4 mm bearings
• Direct replacement for part number ASC71216

🧩 Contents

• 1 Gear B7 MachLite 54T AVID intermediate gear

🎯 Who is it for?

Primarily intended for competitors in the Stock and Spec classes looking to optimize their drivetrain by reducing rotating mass. Its design also maintains sufficient strength to allow for use in the Modified class.

🔄 Compatibility

• Team Associated B7.1
• Team Associated T7
• Team Associated SC7
• Transmissions Team Associated using a 54T intermediate Gear
• Direct replacement for the Gear ASC71216
• Required bearings: 10 x 15 x 4 mm