Hi,
Could I have a bit of help please, so I took my Haro sport to the local bike shop for a service and parts fitted, the only issue they had was fitting my Haro uni disc on a Sugino opc, they said I would need a non threaded 24mm internal size washer to sit in between the right hand side bearing locking nut and the disc- I’ve not heard of this before is that correct- pic included showing bb locking nut and gap to disc.
Any help and pee taking welcome or washers