JS's flagship small wave performance shortboard: the Sub Xero is a super fast and super responsive groveller designed to squeeze as much performance as possible out of small to average surf.

The Sub Xero is a hybrid design based on the new Xero and the popular summer model, the Psycho Nitro. It combines the high-performance characteristics of the Xero with what makes the Psycho Nitro excel in average conditions. The Sub Xero features the Psycho Nitro’s ultra-fast low to flat rocker profile and fuller outline, however the nose is pulled in a little, and it also features a wider, straighter tail.

The Sub Xero to holds speed and changes directions with minimal energy, thanks to its finely tuned bottom contours. The generous thickness and flatter deck is complemented by slightly pulled down rails, which help to maintain volume without sacrificing performance. This makes it easy to initiate turns and react immediately to any section that comes your way.

Availability: 1 In Stock and ready for delivery

Board Dimensions (Current Stock)

Length L Width W Thickness T Volume Vol Fin System Fin Fin Setup Setup Price
5'7" 20 1/4" 2 5/8" 32 ltr FCS 2 5 Fin £975.00
5'8" 20 1/2" 2 11/16" 33.8 ltr FCS 2 5 Fin £975.00
5'9" 20 3/4" 2 3/4" 35.3 ltr FCS 2 5 Fin £975.00
5'7" 20 1/4" 2 5/8" 32 ltr Futures 5 Fin £975.00
5'8" 20 1/2" 2 11/16" 33.8 ltr Futures 5 Fin £975.00
5'9" 20 3/4" 2 3/4" 35.3 ltr Futures 5 Fin £975.00
5'11" 21" 2 7/8" 38.8 ltr Futures 5 Fin £975.00

Board Features

Construction Carbotune
Rocker A medium low entry and exit rocker, with a large sweet spot under front foot
Rails Medium full rails like the Monsta Box. This forgiving performance based rail shape allows for precision when the right section stands up, yet has enough volume to get you through fat sections or avoid getting caught in chop
Single into double concave
Tail Squash
Fins 3 Fin (fins not included)
Skill All surfers
Average to good waves
Origin Made in Thailand


UK Delivery for this product = £19.95 for Express Courier.

Generally all goods ordered before 1pm are sent out on the same day (Mon-Fri).

We offer a fast and efficient worldwide delivery service.

For International deliveries, the shipping will be calculated at checkout, together with any duties and tax. This ensures you have no unexpected charges when receiving your goods.. We guarantee you will have nothing extra to pay.

Check here for our full delivery information

Not happy with your product?

No problem at all!

You can return the product up to 30 days after purchase for a no quibble replacement or refund.
Simply fill out the returns form enclosed with your package and send back to us.
info@downthelinesurf.co.uk or ring one of the team on (01736) 757025

Please find our full Returns & Refund Policy here, and our Shipping Policy here. Customer Services can be contacted here.

If you have any questions about the JS Sub Xero Carbotune Surfboard, submit the product question form below and we'll get back to you as soon as possible. Or give us a call on (01736) 757025.