GFB Lightweight Crank PulleyLike all GFB lightweight pulleys, these begin life as a single 6061 T6 aluminium alloy billet, which is then precision CNC machined to exacting tolerances. We then anodize them black for a stealthy appearance and superior wear resistance. This kit is supplied with 3 pulleys, not just for looks the combined saving of 2. 2 kg is significantly more than what is achieved by replacing just the crank pulley alone. The weight doesnt tell the whole story
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