Universal Fit Enhanced Spring: Fully compatible with Brompton A/C/P/T Line folding bikes, has reinforced and double-spring design for smooth sliding (no folding interference) and comes with 2 balance springs per package (enough for 1 bike’s replacement or upgrade).
Durable Reliable Materials: Crafted with aluminum alloy body and stainless steel spring, resists daily wear, keeps consistent long-term performance, and balances sturdiness to fit folding bikes’ frequent fold-unfold cycles.
Effortless Installation: Supports quick installation and removal, with clear 4-grid marking (face outward when setting up; visible marking confirms alignment after installation) to lower difficulty and save bike upkeep time.
Smooth Operation: Provides smooth compression and rebound for single-finger bike folding/unfolding; Brompton C-buckle moves in parallel (adjust freely without changing its angle) to enhance usability.
Ultra-Lightweight Compact: Each set weighs about 4.5g (12g per pair, minimal extra load) and has a size of ~32mm×25mm×12mm (small space usage) to maintain the bike’s original portability.