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They're zero rake forks, compensated for by the head tube angle
In general rake is to account for head tube angle. if you have ANY head tube angle you need rake, otherwise the bike will not want to go straight. the more slack the HA, the more rake you need. Go to wikipedia and read about rake, HA, and trail on forks.
Some (stupid) trick bikes sacrifice handling and tolerate (key word) zero rake so the fork can be spun and face any direction without change in (the crappy) handling or hitting the downtube. But it's sacrifice made by some fools and it's really an unsatisfying sacrifice unless you're always riding trick.
i agree the aforementioned bike does appear to have no rake, but i don't know why considering it's not a trick bike. it may actually be that it has 1 or 2 cm of rake and we can't see it. Rake can be in the form of forward bent fork legs or simply straight legs which are angled forward.
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That was his bike. Custom option?
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Some track only bikes have had zero rake forks in the past with no eye towards doing tricks.
Like this one
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the frame was built as a trick frame by Bob Jackson, I agree a very misguided attempt by them to cash in on the fgfs market when it was booming.
however, I did own the frame for about 4 years, and it handles very well and the forks are completely straight and the headtube is slightly slacker than normal. so what i said stands
adrevporn
IR
fredtc
They're zero rake forks, compensated for by the head tube angle