Lib Tech Alt Tri + Micro Keel Fin
Best versatile fin set for surfers seeking speed and fluid control.
This unique fin setup is the ultimate hack for river surfing and wavepools, where consistency is everything. By adding a micro keel to the standard tri-fin configuration, you gain the stability needed for artificial waves without sacrificing the loose, responsive feel required for quick turns.
$109.99
at
Lib Tech (official)
More Alt Tri options
Who it's for
- Surfers seeking a balance of loose flow and reliable grip
- Environmentally conscious riders who prioritize long-lasting gear
- Intermediate surfers looking to maintain speed in smaller surf
Who should skip it
- Traditionalists who prefer the locked-in feel of standard fins
- Riders frequently surfing in messy or high-wind coastal conditions
- Gear enthusiasts who enjoy experimenting with various fin brands
Performance breakdown
Wavepool Versatility
Engineered specifically to handle the unique flow of artificial wave systems.
Stability Control
The micro keel adds crucial hold during high-speed, repetitive carving maneuvers.
System Compatibility
Limited strictly to proprietary Lib Tech boxes, restricting broader board usage.
Installation Ease
Included tool makes swapping setups quick and hassle-free at the pool.
Hydrodynamic Speed
Profile design minimizes drag to maintain momentum in stationary river waves.
Build Durability
Rugged construction withstands the abrasive nature of river and pool environments.
Key Specs
Fin System
FCS II
Fin Set Configuration
Thruster (3-Fin)
Fin Dimensions
3 fins (4 5/8 inches) and 1 micro keel fin (1.695 inches)
Compatibility
Lib Tech FCS II fin boxes only
Removable Fins
Yes
Mounting Hardware Included
Yes
Know before you buy
Still have a question?
Ask Metto anything about the Lib Tech Alt Tri + Micro Keel Fin before you decide.
