H&H design silver aluminum 2/3 speed chain pusher comes with 3 titanium screws, weight 7.6g, compare with original chain pusher with steel screws 16.8g, which is over 50% weight reduction.
It could protect pulley from scratches cause the POM rollers contacts could provide less resistance and grinding effect.
Movement radius optimized, easier to adjust for smooth shifting action.
For 2 or 3 speed Brompton only.
NOV DESIGN, tensioner$11.00