Chalk it up to riding year round in an environment with salt on the roads half the year but my headset spacers and and adjusting nuts under the top cap have disintegrated. It is a lower end made in Taiwan Bianchi with what appears to a JIS 27.0 inside crown race. I am looking to replace it and want to know if I can use an ISO headset as long as stack height is similar. JIS being less of a standard and appearing only on cheap bikes I would prefer to source a gently used upgrade for cheap. Thanks for any info regarding this. I looked at the Sheldon Brown site and it appeared they are interchangeable but I want to make dead sure.