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Possibly, these are the carbon ones right? I thought from the catalogues the older alloy forks were also called sub one but perhaps not. I know the older 80s frames had full steel forks. Mine are also 1" steerer
Edit- In the 1994 brochure the 2.8 frames have a 'sub 1' 1 1/4 inch alloy fork that the claim weighs less than a pound. I think this was what @Dick had on his R900 ? Perhaps my 3.o was a lower spec as it was used for the lower R series bikes.
Maybe the ones you're looking for are the Time Slice forks, that the higher end bikes came with?