I have recently purchased a set of 60mm SPF black core wheels (NOS) from ebay. They look like they have the same core as the ATF wheels. I am still awaiting delivery from the USA.. I am living in Australia.
Can you tell me when these wheels were made and were they experimental? If so why were they not continued.
By the way, just been mucking around with 56mm SPF on the front and 56mm STF on the back ala slalom for my slippery sections at the park. Will let you know !!