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Halo Double Fix-G Track Rear Hub

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Product Description

Rear Fix-G Track Hubs

An ever present headache with traditional fixed hubs is the assembly of a drive sprocket that is attached by a thread being pulled in both directions by the pedal torque. The usual solution to avoiding the sprocket unwinding itself from the hub is a left-hand threaded lock-ring, butted up tight against the sprocket. But, as many riders have found out, this system can be quite volatile.

We thought, there has to be a better way...

...and the solution - an HG splined hub body, with sprockets that slide on and an independent lockring that never has to handle rotational forces from the drive.

Halo Fix-G advantages:

  • Easy and secure fixing and servicing.
  • Adjustable chainline - 41 to 52mm.
  • Accepts 12 - 20T sprockets.
  • No need for chainwhip tools.

"Halo's HG spline system is so obvious and brilliant that other brands must be kicking themselves for not thinking of it first. It can't slip or thread; it's way easier to fit or swap and will take down to 12t cogs, it's genius". Ty at the Footdown - www.thefootdown.co.uk

"The Fix-g hub is great! It runs smoothly as the previous Halo hub but the fact that you can move the sprocket for a perfect chainline is great and you can feel the difference straight away. Also, it's really easy to do, everyone can do it without a mechanic's help." Ivan Fiorilla, 5th Floor riding club - London. www.the5thfloor.co.uk

Note: The HG spline must ONLY be used with 7mm wide "fat foot" sprockets such as Halo Fat Foot sprockets or Gusset Double Six sprocket to avoid the cog biting into the alloy splines on the hub. Regular width HG sprockets should NEVER be used.


  • Material Alloy forged and CNC machined
  • Drillings 32H, 36H or 48H depending on model
  • Bearings 2 x 6000 series Japanese sealed bearings.
  • Axle Hollow M10 Cr-Mo axle
  • Spoke Hole Circle Diameter (PCD) 62mm
  • spoke hole size (diameter) 2.5mm
  • Centre to Flange Left and Right: 34mm
  • OLD 120mm
  • Colour Black, Silver or White
  • Weight 328g

Occasionally, without notice, manufacturers change product design and/or specifications.

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Wheels Guide

What are wheels?

Wheels are probably the second most important part of your bike, after the frame. A lot of the bike’s riding characteristics come from its wheels.

Who needs wheels?

A wheel upgrade can make a massive difference to your bike. Because of this, you might consider a new set of wheels, even if the old ones aren’t worn or damaged.

What are the choices?

Mountain bikers choose their wheels in 26in, 27.5in or 29in size, depending on what their frame is built for. Road bike wheels are 700c. Beyond this, there’s a dizzying array of rim material and depth, spoke type and hubs galore – enough to make your head spin faster than your wheels.

What should I buy with them?

A wheel upgrade always deserves a lovely new set of tyres. These too have a massive impact on how your bike rides.

Anything else?

There are several approaches to buying wheels – you can buy a full wheelset, for perfect pairing, or you can take a modular approach, picking hubs and rims before having a new set built to your specification.

Delivery & Guarantee

UK Delivery Information

Please Note: Due to the current circumstances we are experiencing high demand so we may take a little longer than usual to despatch your order. Our Warehouse and Bike Build team are up and running as normal and we are taking active measures to ensure that we are following the government guidance with social distancing and additional health & safety measures have been put in place throughout the business. Please rest assured we will do everything we can to get your order to you as quickly as possible.

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

International Deliveries - Temporarily Suspended 30/3/20

Covid-19 Update

During the Covid-19 outbreak we will be stopping all international deliveries until further notice. We will continue deliveries to the UK, Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Ireland, Northern Ireland, Isle of Wight, Jersey and Guernsey.

If you have any queries, please contact our Customer Service Team. The best way to contact us is to use Live Chat by clicking the widget at the bottom right of your screen.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.