With this Jagwire center-lock lockring you can secure your brake disc properly and safely. This lockring is available with internal and external gearing. Internal gearing is often found on road bikes with , gravel bikes and some mountain bikes with a 12mm thru-axle, an external gearing is often found on mountain bikes with a 15mm thru-axle, but is sometimes also used with a 12mm thru-axle.
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