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9mm seat tube ID
Heat treated Boron 9/16" axle spindle
Bearings are designed to press directly into your bicycles bottom bracket shell
See Tech link below for compatibility info Double or Triple Double Drivetrain Speeds 10 Derailleur Capacity 16 Front Derailleur Clamp 31
SIDI Aertis Mega Mountain Clipless Shoes - Black/Black 45.5 CheckoutTitle=Shimano EW-JC302 Di2 Junction Box - 2 Ports 9mm seat tube IDWhatever the journey Aertis is there to make it easier and better. The comfort of a premium suede construction meets the Firmor technology that offers great lateral support. The nylon sole with replaceable rubber insert allows for maximum grip in any situation and increased walking comfort. Designed for maximum lateral support the Firmor Closure contours the foot with a solid hold and allows infinite size adjustment for the ideal individual fit The
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