Father of four who loves to play
1477 days ago
The O symetric chainrings are a piece of technology many of the riders are choosing to ride. Eliminates dead spot.
Realtime comments disabled
My Trek 660 from the '90s came with this. No one could adequately explain this to me.
What was old is new
Saw these things 20 years ago. It didn't catch on then, as it disrupted rhythm.
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