Onyx Racing Ultra racing hubs use an oversized freehub body so standard Shimano compatible spacers will not fit if you need to change your chainline. This kit includes (2) 1.75mm spacers. Like all of Onyx's products these singlespeed cog spacers are made in the USA.
Onyx Ultra freehub compatible
Does not work with standard Shimano freehub bodies
Made in the USA
MPN
085961
Tree Fort ID:
333222415433
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