One System. Tuned Every Shift.
One System. Tuned Every Shift.
MODULAR • WEIGHTED • PATENT PENDING
One shifter base. Stays Forever
One shifter base. Stays Forever
Install the Base Once. Change Weight and Head Anytime.
ShiftMass
A shift knob SYSTEM that lets you tune weight and swap designs without touching your Base. Precision-threaded in Texas. Patent pending.
Precision Weight System
Precision brass weights for fine-tuned mass. Position weight anywhere along the shaft. Lock it in place. Tune for spirited runs, hard driving, or smooth daily shifts.
Initial setup
Install the base. Position weights anywhere on the shaft. Lock for your preferred feel.
Set & Lock
Thread head and base fully on. Align shift pattern, back off knob head to expose set screws, lock in place.
The System, Inside
One base stays installed. All heads thread directly on. Swap in seconds.
Three Weights. Eight Configurations.
Looks simple. It's engineered. Specific values chosen for what they can do together.
100 Grams of Range, Mapped in 8 Steps
Three brass rings — 18g, 30g, and 52g stack onto the base in any combination. Brass was chosen for its mass per volume. It's heavier than steel, machines cleanly, and self-locks on contact without coatings or hardware. Three sizes, engineered specifically to combine evenly across the range:
Unloaded → +18g → +30g → +48g → +52g → +70g → +82g → +100g
Position the rings anywhere along the shaft. Brass-on-brass friction locks them in place — no set screws, no wiggle.
Change them whenever you want, these three brass rings are a complete multi step weight system — chosen to work together and keep things simple.
Mass, placement, and response — all adjustable.
