Off the Echo website (Y)
"HIFI" is a new model for 2005. Since the BB is 55mm higher than wheel axles. 55mm BB high give chain stays a 8.5 degreed angle with the ground, same as 20" bikes, we call it "Chain stay angle". With 8.5 degreed chain stays angle, you can control the rear wheel easier, and pull the front wheel up easier. Higher body position and large BB clearance. This frame has 26" big wheels and 20" feeling, a new concept to trials sport.
The new CNC head tube looks different and no weak point.
A forward seat tube give less torque to the brake mount.
The brake mount is one piece CNC from a solid aluminum block. All new design.
New design CNC dropout give a smooth looking.
Geometry (400mm fork blade with 45mm forward, 10mm bottom head set):
Wheel base: 1085mm only
Head tube: 120mm / 71 degreed
Bottom bracket: 68mm / 55mm higher
Chain stays length: 375mm
And in regards to the earlier posts about stems :)
We have a "HIFI" stem (130mm/30 degreed) for this frame.