Summer vibes Twin Keel 2-Fin Set FCSii Compatible - 4.5" – Yellow / Black
- In stock, ready to ship
- Backordered, shipping soon
Delivery: tracked fast couriers. Local pickup possible.
The Summer vibes Twin Keel 4.5" 2-Fin Set – FCii-Compatible is built for surfers chasing smooth speed, classic glide and that retro twin fin feeling. With a 4.5-inch keel template and premium fibreglass construction, these fins deliver powerful drive, long drawn-out lines and buttery rail-to-rail flow—perfect for fish shapes and cruisy summer conditions across Australia.
Each fin slots straight into the front tab of FCii-style fin boxes for a clean, compatible fit, and the rear tab locks in with a single screw, giving you total confidence. Quick install, secure hold, consistent performance.
They're also an epic match for the Summer vibes Fish softboards (which have FCii compatible fin boxes) unlocking more speed, trim and fun in smaller waves while keeping your ride smooth and playful.
Why You'll Love Them
- FCii-Compatible fitment – front tab clicks in, rear tab screws down.
- 4.5" twin keel outline for maximum speed, glide and retro-style flow.
- Premium fibreglass construction for stiffness, durability and predictable flex.
- Epic upgrade for Summer vibes Fish softboards.
- Ideal for small-to-medium Aussie waves where flow and speed matter most.
- Smooth rail-to-rail control with plenty of hold through extended carves.
Specs
- Size: 4.5" keel
- Set: Twin (2 fins)
- Compatibility: FCii-style fin systems
- Installation: Front tab slots in; rear tab fixed with single screw
- Construction: Fibreglass composite
- Best suited to: Fish boards, retro twins, keel-fin shapes
The Summer vibes Difference
Summer vibes hardware is designed for real Australian surf conditions—strong, reliable and made for fun. Whether you're trimming along a pointbreak, catching summer runners or carving lil' beachies, these keels give you the speed, hold and flow you're chasing.
keep your gear fresh — a few simple habits
rinse after every surf. fresh water. a 60-second rinse saves gear for years.
dry in the shade, store cool. direct hot sun can delaminate darker boards. keep boards in their cover, flat or on racks — leaning on soft fins can warp them.
check your leash & fins often. look at the swivel, string and plug screws. a tired leash or a loose fin will ruin a good wave and can cost a lot more than a wipeout.
wax it right. base coat first, then top coat in small circles. when it gets grubby, strip it off with a wax comb (or park in the sun for 10 min) and start fresh.
need a hand? ask us →
ask an expert — or browse our guides
not sure what to buy? tap a category below or flick us a message — the team has been surfing the gold coast for decades and we'll point you towards the right gear.
surfboards
- shortboards, groms & fishes — performance boards for the everyday ripper
- mid-length, mini-mal & fun shapes — easy paddle, fast planing, all-rounder
- longboards & gliders — glide, trim and hang five
softboards
- kids softboards — safe, stable, ready for the whitewash
- everyday fun shapes — soft tops with proper performance
- cruising mid-lengths & longboards — confidence and paddle power
- beginner softboards with handles — rentals, schools, first-timers
bodyboards & skimboards
- bodyboards — kids & adult
- skimboards
- bodyboard hardware — leashes, bags, fins
accessories & hardware
- board covers & travel bags
- leashes & leg ropes
- traction pads & deck grip
- fins — FCS & Futures
- transport, racks & straps
- storage, wetbags & change mats
- sunscreen, wax & snorkel sets
- hardware value packs
guides
still stuck? chat to the team — 0412 695 505 — or send us a message.
we ship australia-wide using reliable tracked services. standard delivery takes 3–7 business days, depending on your location. express options are available at checkout. if you're unsure about shipping rates or timeframes, send us a message — we're here to help.
