Joined: Dec 2004
Posts: 12,538
Likes: 791
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
I'm going to take a SWAG and say 43mm. No idea for sure, but it seems like all forks are between 40 and 45 mm, and it's doubtful you'd notice a 2 or 3 mm difference.