Infinity B-Line Twin

Twin-Fin Speed. Hybrid Control. Modern SUP Surf Performance.

The Infinity B-Line Twin brings the explosive DNA of the original B-Line into the modern twin-fin era. Influenced heavily by Infinity’s traditional surfboard program — and driven by the twin-fin obsession of Dave Boehne and Bernd Roediger — this board blends glide, looseness and drive with the stability and control SUP surfers need.

If you want maximum speed, smooth rail flow and a twin-fin feel without losing the precision of a high-performance SUP, the B-Line Twin is your board.

Why the B-Line Twin Exists

Infinity’s surf SUP lineup has always mirrored what’s happening in their shortboard world. With the global resurgence of twins — and the Infinity team loving them — the B-Line Twin became a natural evolution.

The original B-Line provided the perfect foundation: hybrid outline, lower-volume rails, built-in stability, and a fast, reactive feel. The new Twin version keeps that DNA but retools it for effortless drive, smoother carves and a more playful style of surfing.

It’s the most fun-forward performance board in the Infinity lineup.

How It Surfs

Fast, Flowing, Loose — but Predictable

The twin-fin setup gives the board tremendous speed with a freer, more skatey feel through turns.
A lower tail rocker and vee-based bottom allow it to hold powerfully in carves while still releasing instantly when you redirect.

Stability Borrowed from the Wide Speed

A linear midsection and slightly wider nose create a calm, balanced platform.
This extra stability allows riders to choose smaller sizes without losing confidence.

Sharper Control From BLURR V3 DNA

The nose outline and rail sensitivity echo the BLURR V3, keeping the board highly responsive and controlled in steep sections.

Key Design Features

• Original B-Line DNA with enhanced twin-fin flow

• Performance hybrid outline with straighter midsection for speed and stability

• Twin fin + trailer setup for power, drive and control

• Low aspect shortboard-style rails for precision and fast rail engagement

• “Bump” in the tail outline giving a natural pivot point for explosive turns

• Jet tail for added grip and hold at high speeds

• Single-to-vee concave bottom for smooth rail-to-rail transitions

• Moderate entry rocker + reduced tail rocker for maximum speed

• New lightweight water-resistant traction & larger carbon handle

• SUPspensionTECH construction — Infinity’s premium full carbon molded sandwich build with tuned flex

Ideal Rider

Choose the B-Line Twin if you:

• Want a performance SUP surf board with twin-fin personality

• Love speed, drawn-out carves and smooth flowing lines

• Prefer a board that feels lively but still offers predictable control

• Are a fan of the original B-Line but want something looser and more surfboard-like

• Want a twin-fin that still handles power and bigger turns

This is a board for riders who love performance, but want to keep surfing fun.