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12x148 Boost
the Therminal™ features our Standard Fit
while our T-Flex technology provides increased pedaling efficiency for the climbs
Technology Powerglide II Weight 311g Speeds 8 Speed Recommended Chain PC-870
Roll down feature on the hood stows it away neatly when not needed
Specalized Rib Cage II RIPROCK 12x148 BoostThe Rib Cage II is not only a sleek, lightweight water bottle cage, but it's also been designed to be fast in the wind. Of course, it also performs its primary task of holding tight to bottles dutifully, so you won't be losing bottles when the road gets rough. SWAT compatible design allows for storage and tool integration. Super low bottle position improves the aerodynamic profile. Tuned compression design provides a secure bottle retention with easy