Each bridge along this trail contains a cycling sprocket (gear) to commemorate the trail. Your task is to find these sprockets from bridges 25 to 18 (counting down from the north trailhead), count the teeth (on the outside), and adjust each number as below to reveal the coordinates of the final.
Cache can be found at S38 0P.USH E177 2B.IKE
where
P = number of teeth on sprocket at Bridge 18 less 4
U = number of teeth on sprocket at Bridge 19 less 13
S = number of teeth on sprocket at Bridge 20 less 13
H = number of teeth on sprocket at Bridge 21 less 9
B = number of teeth on sprocket at Bridge 22 less 13
I = number of teeth on sprocket at Bridge 23 less 16
K = number of teeth on sprocket at Bridge 24 less 6
E = number of teeth on sprocket at Bridge 25 less 8
Checksum of PUSHBIKE is 45