Same crank as our trusty and proven 1948 cranks only in a spline drive version. Features the same seamless 4130 heat-treated Cr-Mo arms with wrap around pedal gussets as the 1948's. We've just removed the option to run a bolt drive sprocket. Our kit includes either a 25t or 28t Cr-Mo 48-spline sprocket which eliminates the crank boss and simplifies your crank setup while making it overall lighter.
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