OK, Lets 'math it out' for everyone to see.
Draw a 90 degree triangle. (90 degree means that one of the three angles is 90 degrees) one angle (the hypotenuse) is the angle of the forks on the bike at 35 degrees. We also know that the Hypotenuse (thats the longest leg) is a stated 31 inches long. SO, we take 31 x 35 cos (the 'cos' is short for cosine on the calculator) which gets us 25.39 inches in a vertical plane. We then take 31 x 35 sine to get 17.79 iches in a horizontal plane.
Ok, so we know you want to keep it level, so lets leave that vertical leg at 25.39 inches, but change the angle to 40 degrees since you are adding 5 degrees. So, we take 25.39 x 40 tan (tan is short for Tangent) to get 21.3 inches horizontal
Then we can take 21.3 squared plus 25.39 squared. That gets 1098.34. get the square root of that for a result of 33.14 inches.
So your new Hypotenuse needs to be 33.14 inches. If it were me, based on the numbers you give us./ you need only 2 inches longer forks to keep it level with the additional 5 degrees of angle.
BUT, if you gave me only the TUBE length, not the whole fork LEG length, that will change the numbers, so be sure to confirm that its the whole leg you measured, not just the upper tubes.
Main point was to share the math/love.
If one person is asking, there is always a hundred more that are curious.
Posted on May 10, 2011, 7:07 PM from IP address 22.214.171.124