Another
rigid frame for a 250 tire. All tubing has single bends with a splice in the center of the rear wishbones. Neck rake is 40 degrees (Note that the trees need to be raked to
reduce trail to a more manageable amount. Our adjustable mock up forks ran out
of length before any tree rake could be set).
Backbone is 1.5” x .188” wall. All other tubing is 1.25” x .125” wall. It is about 34” from the bottom of the frame
to the center of the steering neck. There is 4.25” of block under the frame
right now and it would set level with 4.5” under the bottom. Mounts and dimensions are set to accept
softail driveline parts. Shown with Evolution engine, cast softail primary and
softail 5-speed transmission.
Rear
wishbones come to a point behind the axle housings. Covers are aluminum held on
with stainless flat head socket screws. Axle is 1” diameter with cup washers
for ½” socket head cap screws. There
are stainless axle screws in front of the axle housings for axle adjustment.
Here is a stock dimension softail style
frame in front of the rigid frame showing the changes in neck stretch and
angle. The rigid frame is comparable to
the softail frame in seat height, but with the raised axle height and a custom
seat, this frame puts the rider much closer to the ground.