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GS-D keeps your chain in place. No matter how hard you hit the trails, GS-D will prevent your chain to drop on your BB.

By using state-of-the-art technology, we managed to reduce greatly friction, chain offset, noise and rolling resistance.


• Material: Aluminum with CNC Machined
• For 7-12 speed
• Chainring capacity: 22T-38T , ISCG-05 System
• Weight: 77g
• Color Available : Black
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