Providing all else is the same (check the axle to fork crown length), the shorter rake will give you a longer trail and make the bike more stable which could be a good thing for a tri bike. Whether you would actually be able to tell the difference...???? - TFleaderman said:I am riding a Triathlon Bike and my fork rake is 43mm. I would like to go to a more aero fork and found a good deal but the aero fork is 40mm. Will I see much difference in the ride of my bike with the 40mm fork?.