WELCOME TO THUNDERBOLT SURF AUSTRALIA

WELCOME TO THUNDERBOLT SURF AUSTRALIA

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HI-MD4M-R-510-CANWH



PRE ORDER NOW AT YOUR LOCAL THUNDERBOLT RETAILER - SHIPPING NOVEMBER 2026


MID4 3+3 – Three Boards in One.

The MID4 3+3 is the next evolution of our best-selling mid-length. Built directly from the MID6 – the most popular board we've ever made – it takes everything riders love about that shape and opens it up with the 3+3 fin system.

That means three boards in one. Ride it as a true quad for drive and hold, a true twin/twinzer for speed and flow, or an asym for the best of both. Super versatile, super fun – no second board needed.

The MID4 keeps the easy wave-catching the MID6 is famous for, with a slightly tighter nose for more pocket-surfing comfort and a forgiving flat bottom that stays fast and free through any section. You can ride it comfortably on or well over volume.

The shorter sizes (5'10, 6'0, 6'2) drop smaller and more performance-oriented than ever – perfect for higher-level surfers, or anyone wanting MID6 DNA in a shorter package. The bigger sizes (6'6, 6'10, 7'4) bring more flow and paddle power – ideal for downsizing from a longer board or complementing your MID6 or MOE.

Key Features

  • Plan Shape – Direct MID6 scale with a tighter nose outline for added pocket-surfing comfort.
  • Bottom Contour – Flat entry with Billy's signature rail relief – forgiving, fast, and free.
  • Channels – Four channels (down from the MID6's six) to make room for the 3+3 fin system.
  • Rails – A more performance rail that penetrates the wave cleanly, without stickiness.

Fins

  • Quad: (black plugs)
  • Twin: (white plugs) – for Twinzer add a set of canards in the front quad box
  • Asym: Twin on toe side, quad on heel side

Dims

Length Width Thickness Volume
5'10" 19 1/4" 2 3/8" 28 L
6'0" 19 1/2" 2 1/2" 31 L
6'2" 19 3/4" 2 5/8" 33 L
6'6" 20 1/8" 2 11/16" 37 L
6'10" 20 3/8" 2 3/4" 40 L
7'4" 21" 2 13/16" 46 L

If you've been curious about asym boards, or just want more out of one shape, the MID4 3+3 opens the door. Our best-selling mid-length – now three boards in one.

Shipping

Most boards ship for $25 to East Coast States. for WA, TAS, NT please reach out for a quote. HERE

For full shipping details check our "Terms of Service"

Boards can be collected from our Gold Coast Warehouse.

Colours

Board colours may vary between what is shown online vs in real life, this could be due to our boards being hand made and painted or the different screen you are viewing on. If you are unsure of a colour please visit one of our retail partners or hit us for some photos.

Size
Color
$1,395.00 AUD
Tax included