Enhance your Brompton bike’s performance with this high-quality 7-speed Bike Speed Flywheel, crafted from durable chrome molybdenum steel for exceptional strength and wear resistance. Designed specifically for external 7-speed cassette modifications, this flywheel delivers reliable shifting and long-lasting durability to meet the demands of avid cyclists. Key Features: · Premium Chrome Molybdenum Steel Construction: Ensures superior strength and enhanced wear resistance, providing a durable and long-lasting flywheel for your bike. · High Tension Backplane with Triple Nickel Chrome Plating: Offers excellent corrosion and rust protection, maintaining the flywheel’s appearance and performance over time. · Precise Compatibility: Designed exclusively for external 7-speed cassette upgrades on Brompton bikes, ensuring a perfect fit and optimal functionality. · Mud Discharge Holes: Strategically placed holes reduce overall weight and facilitate easy cleaning by preventing mud buildup, keeping your flywheel running smoothly. · Chain Guide Slot Design: Improves chain alignment and shifting sensitivity, delivering smooth and responsive gear changes for an enhanced riding experience. Specifications: · Material: Chrome Molybdenum Steel · Product Style: 7-speed 11-28T Silver · Gross Weight: 278g / 9.8oz · Item Type: Bike Speed Flywheel Package Includes: · 1 x Bike Speed Flywheel Upgrade your Brompton bike’s drivetrain with this precision-engineered 7-speed flywheel, combining strength, corrosion resistance, and thoughtful design features to ensure smooth shifting and reliable performance on every ride.