Function:

• Ratios – 11-13-15-17-19-21-24-28-32-36-42-50T
• 7075 Largest sprocket (42T & 50T sprockets and spiders)
• Circlip and spacers made of aluminum
• 10 chain wheels on 2 aluminum spider carriers
• Standard 12-speed Shimano freewheel
• Compatible with SRAM / Shimano long cage derailleurs

Specification:

• Brand name: RETROSPEC
• Material: aluminum
• Gear teeth: 11-50T
• Origin: CN (origin)
• Freewheel speed: 12
• Components: freewheel
• Flywheel adjustable gear number: 12S
• Model Number: 12 speed cold
• Sensitivity: 72 tones
• Weight: Approx. 592 g
• OEM package

Package Include:

• 1 x RETROSPEC 12S 11T-50T flywheel