Just wondering how the orange sub5/five frame angles have changed over the years.
The current 5 is 67? head and 73? seat.

Give Orange a call they will help on your info
You will find it is steeper than that

Sub 5 wouldn't take anything over a 100mm fork.

I had an orange sub 5 years back and got some 100-120 Manitou Black forks on the frame. It was Ok at 100 but handled like a boat at 120mm by flopping into corners.

Frame was designed for 80mm forks originally because that was what was around in them days.

Don't know about head angles but I suspect the sub 5 had a slack head angle to suit shot travel forks, compared to a more modern "5" that can handle longer forks.

You can find figures for most years with web archive, eg. sub5 here:
http://web.archive.org/web/20001120131500/www.orangebikes.co.uk/bikes/sub5.shtm

or….original site from 2003…

http://www.orangebikes.co.uk/2003bikes/sub5.html

Has been as high as 70 head angle

71 Degree head angle and 73 Degree seat angle

ah, web archive. neat!