this depends on what your chainline is at the hub, whether your new bb or cranks are iso or jis.
the 115mm figure is probably to give 42mm chainline, but your chainline may not be 42mm at your hub. measure this.
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this depends on what your chainline is at the hub, whether your new bb or cranks are iso or jis.
the 115mm figure is probably to give 42mm chainline, but your chainline may not be 42mm at your hub. measure this.