Shimano Lockring Removal Tool For Zipp Firecrest Hubs

mr_mojo
mr_mojo Posts: 200
edited June 2017 in Workshop
I've recently bought a pair of Zipp 404 Firecrest Carbon Clinchers and are struggling to find a Shimano cassette lockring removal tool that fits the Zipp hub. My original one was too thick to fit over the axle and in the lockring so went to my LBS and bought a Birzman tool but same problem. The rear hub is a Zipp 177 hub.

Can anyone advise what they use? The metal of the tool needs to be quite thin to fit.

Thanks.