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Specialized Stumpjumper 650b 2017
Material Construction: Extruded Aluminum frame with hardened steel tools
CNC machined aluminum alloy spider carrier saves weight
Based in the racing hotbed of Indy
Boost compatible with 52mm chainline
45NRTH Concave Carbide Aluminum Tire Studs - Pack of 300 mountain-frame Specialized Stumpjumper 650b 201745NRTH utilizes a two piece construction method to create a reliable and high performing bicycle tire stud, featuring a concave carbide aluminum design. The super sized concave crown creates open space and inside edges of the bowl, resulting in twice the surface area for increased traction and grip. We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque
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