Radix blades fly light and quick for agressive 3D but they still do forward flight like they are on rails. In addition to their smooth precise flight characteristics they are also one of the quietest blades in the air. To top it off they auto great. The perfect combination for a 3D blade.

The 690s come in two weight ranges, 185g and 175g.

YB690-185g are the weight Curtis uses and are for general 3D flying. YB690-175g are lighter and more aggressive for "Stick Banger" style flying.

All blades are prebalanced and ready to fly.

Blade Specs:
Length bolt hole to tip: 690mm
Weight: 185g

Root Details
Root: 12mm
Washers included for: 14mm, 16mm, 18mm
Bolt Hole: 5mm
Sleeve inclued for: 4mm bolt

General Notes
-Washers included in lid of box.
-All blade sets are pre balanced and ready to fly.
-Individual blades are matched and balanced into sets. The normal weight variation between sets +3g. So a "185g" series blade set may be between 182 and 188g in weight.