Following on from the 5AM Limitless wheels that it released last month, Hunt Wheels is introducing its new 4AM Limitless wheels. Hunt says they’re designed to deliver responsiveness and category-leading aero efficiency in “high alpine racing environments”, and they will be available with either carbon or steel spokes. As normal, you can specify steel or CeramicSpeed bearings as choose from the usual selection of freehubs. There is also an additional option to specify steel spokes for the existing 5AM Limitless wheelset that’s designed to maximise speed across flat and rolling terrain.

Hunt 4AM Rim Diagram
Hunt 4AM Rim Diagram (Image Credit: Hunt Bike Wheels)

Hunt says it aimed to create the fastest and lightest wheels in their peer group, whilst still retaining higher speed stability. They provide confident stability at racing speeds by keeping airflow attached at higher yaw angles, says Hunt. By recessing the spoke nipples into the rim, rotational drag can be lessened too.

This third-generation Limitless range was designed and engineered using Hunt’s 5-stage Aero Development process that includes CFD (Computational Fluid Dynamics), a three-phase wind tunnel testing system and then real-world validation with Aerosensor, a handlebar-mounted device that measures aerodynamic drag in real time. This work led to wider and deeper front rims being paired with shallower and narrower rear rims. The front rims gain “class-leading speed, stability and control”, according to Hunt, while the rear rims deliver weight reduction and efficient power transfer.

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Hunt 4AM Limitless recessed nipple
Hunt 4AM Limitless recessed nipple (Image Credit: Hunt Bike Wheels)

Hunt says that the 4AM wheelset has been wind tunnel tested and shown to provide a 1.4 watt advantage over the Tour de France-winning Enve 4.5 Pro wheels at 45 km/h, with 30mm tyres fitted – a modest gain, but you get a 139g weight saving too. Hunt says that you’re getting deep aero wheel performance with the weight of a climbing wheel. The Ti-UD wheels weigh 1,156g for a pair, and the steel spoked option comes in at 1,283g for a pair (Hunt’s figures).

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The Vonoa Ti-UD spokes are just 1.7g each, and there are 15 of them in the front wheel and 18 in the rear. The recessed nipples are said to smooth the airflow over the rim section, and very few spokes are exposed to clean air at any time, helping to reduce drag.

The Vonoa system uses titanium end fixings to hold the spokes securely in the hub. The spoke itself uses carbon to form an elongated aerofoil shape and can only be adjusted from the outside of the rims (not from the side nearest the hub). When trueing the wheel, the Ti_UD spokes require a special tool, available on Hunt’s website. This is needed to stop the spoke from rotating during a true-up.

2026 Hunt 4AM rim graphic
2026 Hunt 4AM rim graphic (Image Credit: Hunt Bike Wheels)

It is worth noting that Hunt only uses hooked rims for the 4AM and 5AM wheels. They see merit in this technology and are not providing a hookless rim option. If you want to know more about the arguments from both sides of the debate then here is an article from earlier this year.

As all these rims have a 23mm internal width measurement, they are compatible with 28-50mm tyre widths, although they are aerodynamically optimised for 28-30mm tyres. They can be run tubeless or fitted with inner tubes.

Hunt 4AM Limitless hub spoke

Hunt 4AM Limitless hub spoke (Image Credit: Hunt Bike Wheels)

The steel-spoked wheelset is 127g heavier than the carbon-spoked version at 1,283g. In addition, the spoke count rises from 15/18 to 20/24 (front/rear), but the rim profiles remain the same. These wheels use triple-butted Pillar SuperWing 20 aero-bladed spokes. Like the Ti-UD version, the spoke nipples are recessed. Hunt’s wind tunnel testing found that this option was 1.13 watts faster than the ENVE 4.5 Pro wheels (mounted with 30mm tyres at 45 km/h), yet only weighed 12g more.

Pricing for the Ti-UD carbon spoked version is £1,959 when stainless steel bearings are specified, rising to £2,449 for the CeramicSpeed bearing version. The choice of freehub doesn’t alter the pricing. The steel-spoked version is £1,659 with the stainless steel bearings.

Hunt says, “Both steel and UD spoked wheels are tested to the same standards, meaning from a strength point of view they are the same.” Hunt 5AM Limitless rim

Hunt 5AM Limitless rim (Image Credit: Hunt Bike Wheels)

Finally, the new 5AM Limitless wheelset option that we mentioned up top… The existing 5AM Limitless wheels come with Ti_UD spokes, but now you can have Pillar SuperWing 20 aero-bladed spokes to bring the price down.

The full range now features the carbon-bladed spoke option (15 spokes at the front, 18 at the rear) with either stainless steel or CeramicSpeed bearings, and this new steel spoke option, with a 20/24 spoke count and stainless steel bearings. The new version is priced at £1,699 as compared to either £1,999/£2,489 for the existing options.

Switching spokes means a weight rise from 1,212g to 1,339g. Hunt says that its outdoor Aerosensor analysis shows that there is only 3.5 watts difference between the two wheelsets at 40km/h (they used 30mm Continental GP5000 STR tyres during the testing).

Orders will begin shipping in late May 2026 for the 5AM steel spoke variant and towards the end of June 2026 for the 4AM.