HUNT 40 Carbon Gravel Dynamo Front Wheel

HUNT 40 Carbon Gravel Dynamo internal rim

NEW

HUNT 40 Carbon Gravel Dynamo Wheelset

1834g	Depth	Width ext	Width int	size
1834g	40 mm	30 mm	25 mm	700

The 40 Carbon Gravel Dynamo Wheelset combines race-winning, wide, lightweight carbon rims and an H_Ratchet 40T rear hub, with a SON 28 Dynamo front hub to provide responsiveness, aero efficiency, reliability and charging/lighting capabilities for long-distance ultra races, commuting and fast bikepacking adventures.

Tire size: Optimized for 35 to 50mm tires; work well with 29mm up to 60mm.

Option

Freehub

$1,799

Limited Stock. Available Now.
Wheelset - Limited Stock
Front Only - Limited Stock
Rear Only - Limited StockItems are selected to ship from us in the week stated. Delivery time is 2-6 days*

We will ask for axle info after checkout.

US HQ & Warehouse. Order by 2pm (MST) for shipping the next business day (if shown in stock).

Our wheels are in high demand, don't miss out. Order now.

More details

The Purpose _

The 40 Carbon Gravel Dynamo wheelset is designed for long-distance ultra races and multi-day bikepacking adventures, featuring a SON 28 Dynamo generator hub to power your lights and electronics, allowing you to ride till you’re finished, not when your lights and GPS run out. Based on our race-winning 40 Carbon Gravel Race wheelset, we built this wheelset for HUNT athletes tackling gravel ultra events like the Traka, Badlands, and Unbound XL, as well as for adventure riders seeking a lightweight carbon upgrade wheel.

The 40mm deep rims with 25mm internal width suit modern gravel and wide road tires (29mm and wider), offering aerodynamic efficiency, low rolling resistance, and improved traction. Made from fully recyclable carbon fiber and resin using H_Cyclo technology, blending purpose-built performance with improved sustainability. The 28 spoke J-bend build with brass spoke nipples and our H_Ratchet 40T DBL rear hub offers quick engagement, strength and reliability without sacrificing responsiveness or ride quality.

KEY FEATURES_

Tubeless Design

40mm-deep and 30mm-wide external rim profile, featuring an ETRTO-compliant tubeless straight-sidewall rim with 25mm internal width, designed for modern gravel tubeless tire compatibility.

H_Cyclo

Fully recyclable thermoset epoxy resin technology that allows for the separation and re-use of both the carbon fiber material and resin components at end-of-life without creating waste solvents or pollutants. Race-ready rims that will never see the landfill: performance meets purpose.

H_Ratchet 40T DBL Hub

Dual-sided 40-tooth ratchet system offers 9-degree engagement and durability for loaded adventures, with all 40 teeth engaging simultaneously to handle high torque loads.

Son Dynamo Front Hub

SON 28. 3 watt / 6 volt output at 16kmh tested to German standard K687 for output requirement.

TECHNOLOGY _

Fully recyclable thermoset carbon technology with no performance compromise.

H_Cyclo technology enables the recycling of both the carbon fiber materials and the epoxy resin used in the thermoset carbon fiber molding process, which is the most mature carbon fiber manufacturing process available for bicycle rims and components, generally yielding a higher strength-to-weight ratio when compared to other carbon production methods such as thermo-plastic resin systems. This may well change over time as technologies mature, but for now thermoset is the leader in strength-to-weight ratio for bicycle rims and frames.

Using a chemical solution called CleaVER, the carbon fibers and epoxy resin are separated using heat and agitation, so that both components can be re-used to create new (smaller format) carbon components without the by-products of waste solvents or pollutants. Secondary products can be constructed without the addition of virgin carbon fibers, significantly reducing the production emissions required. Originally created to enable the recycling of large format glass fiber wind turbine blades, the recyclable resin has no impact on the structural integrity or strength-to-weight ratio of the carbon layup, making the technology ideal for precision, high-performance rims. HUNT will cover the collection of product at end-of-life, making the process seamless and no-cost for riders, should their wheels become unusable in an accident or crash.

To learn more about the H_Cyclo technology and process, read our explainer here.

Full Specs _

Rims

Disc-specific hookless/straight-sidewall design. H_Cyclo Recyclable resin technology. 40mm deep with 30mm external and 25mm internal dimensions. H_LOCK bead-seat up-kicks, for easy and secure tubeless installation. UD carbon fiber finish with matt white contrasting graphics.

Disc-specific hookless/straight-sidewall design.
H_Cyclo Recyclable resin technology.
40mm deep with 30mm external and 25mm internal dimensions.
H_LOCK bead-seat up-kicks, for easy and secure tubeless installation.
UD carbon fiber finish with matt white contrasting graphics.

Spokes

28 Spokes Front & Rear in a 2 Cross interlacing pattern. J-bend interface for easy sourcing or repairs in remote areas. Aero Butted 2.0-2.2/0.95-2.0 then PSR section is 2.2. Cold drawn from high-grade T302 (18/10) stainless steel wire by Sandvik Sweden. Patented Pillar Spoke Re-enforcement, butted again just before the spoke head providing more durability in high stress area. Black stainless treatment.

28 Spokes Front & Rear in a 2 Cross interlacing pattern.
J-bend interface for easy sourcing or repairs in remote areas.
Aero Butted 2.0-2.2/0.95-2.0 then PSR section is 2.2.
Cold drawn from high-grade T302 (18/10) stainless steel wire by Sandvik Sweden.
Patented Pillar Spoke Re-enforcement, butted again just before the spoke head providing more durability in high stress area.
Black stainless treatment.

Nipples

16mm length for a strong connection to the spoke added durability. Square body for external adjustment and square head for easy internal adjustment/tensioning. 14 gauge brass nipples for increased durability, corrosion resistance and self-lubricating properties.

16mm length for a strong connection to the spoke added durability.
Square body for external adjustment and square head for easy internal adjustment/tensioning.
14 gauge brass nipples for increased durability, corrosion resistance and self-lubricating properties.

Front Hub

SON 28 Dynamo Hub Shell: aluminium 6082 T6. Sealing: alloy dust shields, rubber lip seals and pressure compensation system. Supplied with: 2x Spade Connector with Shrink wrap cable protectors. Warranty: 5 years. Center-lock disc mount. If you require a 6-bolt adaptor you can purchase separately here.

SON 28 Dynamo
Hub Shell: aluminium 6082 T6.
Sealing: alloy dust shields, rubber lip seals and pressure compensation system.
Supplied with: 2x Spade Connector with Shrink wrap cable protectors.
Warranty: 5 years.
Center-lock disc mount. If you require a 6-bolt adaptor you can purchase separately here.

Rear Hub

HUNT H_Ratchet 40T DBL JB Hub. 40-Tooth ratchet rings on floating carrier, offering quick 9˚ engagement. Machined spoke flanges for better bracing angles. H_Ceramik freehub body reinforcement coating provides excellent durability and protects against cassette sprocket damage to the freehub often seen on standard alloy freehub bodies. All freehub standards available. 6066 T6 heat-treated aluminium alloy hub shell. Polished anodized black finish with laser graphics. Center-lock disc mount. If you require a 6-bolt adaptor you can purchase separately here.

HUNT H_Ratchet 40T DBL JB Hub.
40-Tooth ratchet rings on floating carrier, offering quick 9˚ engagement.
Machined spoke flanges for better bracing angles.
H_Ceramik freehub body reinforcement coating provides excellent durability and protects against cassette sprocket damage to the freehub often seen on standard alloy freehub bodies.
All freehub standards available.
6066 T6 heat-treated aluminium alloy hub shell.
Polished anodized black finish with laser graphics.
Center-lock disc mount. If you require a 6-bolt adaptor you can purchase separately here.

Axle Sizes

These wheels are compatible with the following axle specifications. We fit the axle adapters you need, just complete the simple form shown after checkout: Front: 12x100mm Thru-Axle, Quick Release 9x100mm Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm If you are unsure, please do not worry as our form includes the option to tell us your bike model. We will then do our best to support you and fit the correct axle adapters. We may contact you via email if we need further information. Plus, if you don't get it quite right, we're happy to send you the correct adapters. Please note; this form is shown after you have completed your order.

These wheels are compatible with the following axle specifications. We fit the axle adapters you need, just complete the simple form shown after checkout:

Front: 12x100mm Thru-Axle, Quick Release 9x100mm
Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm

If you are unsure, please do not worry as our form includes the option to tell us your bike model. We will then do our best to support you and fit the correct axle adapters. We may contact you via email if we need further information. Plus, if you don't get it quite right, we're happy to send you the correct adapters.

Please note; this form is shown after you have completed your order.

Tires Info

HUNT recommends a 35-50mm tire for best performance, tire widths between 29mm and 60mm are also safe to use. Only use tires that have been documented as hookless compatible (TSS) check with your tire manufacture. Note: best performance is usually gained by using tire pressures lower than the maximum, you can see our blog post about this, read here. Tubeless-ready for lower weight and rolling resistance You must not exceed the maximum tire pressure limits set out in the table below or the maximum limit set by your tire manufacturer if this is lower.

HUNT recommends a 35-50mm tire for best performance, tire widths between 29mm and 60mm are also safe to use.
Only use tires that have been documented as hookless compatible (TSS) check with your tire manufacture.
Note: best performance is usually gained by using tire pressures lower than the maximum, you can see our blog post about this, read here.
Tubeless-ready for lower weight and rolling resistance
You must not exceed the maximum tire pressure limits set out in the table below or the maximum limit set by your tire manufacturer if this is lower.

Bearings

Super smooth precision bearings with proprietary waterproof grease, specially developed for even the worst weather. Sealed cartridge replaceable units. Dual full-contact seals.

Super smooth precision bearings with proprietary waterproof grease, specially developed for even the worst weather.
Sealed cartridge replaceable units.
Dual full-contact seals.

HIGH SPECIFICATION COMPONENTS _

H_Cyclo Rims

Fully recyclable and reusable epoxy resin technology, H_Cyclo, allows HUNT to recycle and reuse the carbon fiber from this wheelset. Utilizing this technology, end-of-life carbon composites undergo a process where the resin is separated from the fibers, allowing them to be utilized into new applications.

SON 28 Dynamo

Designed for smooth reliability and longevity, SON hub dynamos have been an undisputed benchmark for many years. The generator is precisely adapted to the intended use and efficiently powers headlights, rear lights or charges devices and power banks while riding, even at low speed.

PRECISION BEARINGS

Double sealed stainless steel cartridge bearings offer smooth, reliable service with low friction.

FREEHUB BODY

Featuring HUNT’s H_Ratchet double-sided system (with two floating ratchet rings), with a 40-tooth ratchet ring resulting in quick 9-egree engagement. The freehub benefits from H_Ceramik anti-bite coating to ensure maximum durability. Durability is a theme for HUNT, and so all our freehub bodies have Steel Spline Insert re-enforcements to provide excellent durability against cassette sprocket damage often seen on standard alloy freehub bodies.

What's in the box _

Hunt Black Shield tubeless tape fitted to wheels.
The axle adapters needed for your bike, just fill in the simple form shown after order completion, the form is also included in your order confirmation page.
Cassette spacer for 8/9/10 speed and XDR-XD compatibility.
2x Spade Connector with Shrink wrap cable protectors
55mm Tubeless Valves.
Spare of each spoke plus nipples.
Quality control card signed by your wheel builder.

WARRANTY_

A full 3 years from purchase date warranty is offered to the original purchaser only on all Hunt bike wheels against material or workmanship defects, please click here to read full details.

5 YEAR SON WARRANTY (INCL. BEARINGS) - The unique SON Pressure Compensation System allows us to offer you a huge 5-year warranty on the SON Dynamo hubs including bearing wear.

Stated wheel weights: Our stated wheel weights reflect the wheelset only; without rim tape, tubeless valves or disc brake lock rings, as is industry standard. A 3% variance (lower or higher) in total system weight is normal for wheelset manufacturing.

All HUNT wheels models have to pass our harsh cobbled-rolling-road tests for rider weight limits, please see here for more details. Max system weight 319 lb(system weight : total weight of fully kitted up rider, bike and luggage). If the system is over 275 lb then an experienced bike mechanic should check the wheel regularly.

We've got your back

Rider Experience Support

Unmatched rider support, 7 days a week. For quick and immediate access to all the help you need, try our Live Chat. Our team consists of real bike riders who are fully equipped to answer any questions and help out. See Contact Us page for more details.

Spares Available

Any spares for our wheelsets can be found on our website. If you assistance, contact us and we can help you.

Next Day Shipping

As enthusiastic cyclists, we know you want your bike gear so we make sure all in-stock items are packed and dispatched within 1 working day.* As soon as your order is dispatched you’ll receive an email notification.

*Subject to stock levels & cleared payment

60 Day Ride and Return

We are so confident that you'll be happy with you HUNT wheels that we offer a full 60 day to ride them & return for a full refund (or product swap). Click here to learn more.

ABOUT HUNT _

Hunt Bike Wheels are a team of talented, passionate riders with a wealth of industry experience, and set out to bring you the latest, most practical, forward-thinking technology in all things round.

Our mission is to serve devoted riders with the highest performing products, backed by best-in-class rider support.

All of our wheels are built and finished by hand, inclusive of a full quality control inspection.