FSA

Mega Exo 7100 Bottom Bracket Fat Bike English

What Our Gearhead® Experts Are Saying:

"This bottom bracket was born for winter. I’ve put it through salt, snow, and endless freeze cycles on my fat rig—it stays quiet, stays smooth, and installs with zero guesswork. It’s an essential upgrade for wide shell setups."

Specifically designed for fat bike frames with BSA threading, the Full Speed Ahead BB-7100 MegaExo Bottom Bracket (Fat Bike English version) brings reliability to wide crank setups in demanding winter and off-road conditions. Built with durable CNC-machined and die-cast alloy bearing cups, it resists salt, snow, and moisture while maintaining a tight, secure crank interface.

The BB-7100 uses sealed cartridge bearings to ensure smooth rotation and prevent contamination in harsh riding conditions. Its adjustable composite center sleeve allows compatibility across wider shell widths commonly found on fat bikes, making it a smart choice for riders seeking long-term durability and ease of service in cold climates.

Whether you’re racing snow-packed trails or riding year-round in wet weather, this bottom bracket delivers consistent performance in wide-format drivetrain setups.