Dynamo freedom, now available in 650B! Ready for your bike-packing adventures, hassle-free commuting, and winter training. The SON28 Dynamo powers your lights and charges your GPS/phone*. Our MASON x HUNT 29mm-wide 650B rim, 4 Season Disc rear hub and 28-spoke build provide excellent durability with low weight.

19 Deep | 29 Wide Ext | 25 Wide Int | 1947g

The Purpose

The 650b version of our highly-rated SUPERDURA DYNAMO DISC, created for 'Josh' types (ultra-endurance heroes), but also enjoyed by 'us' types (a bit less super-human, but still want convenience when commuting, training and road/off-road bike-packing).

A dynamo hub is an ingenious idea, a small coil of copper wire that spins inside a group of magnets to produce electricity, effectively it is an electric motor in reverse. You can then connect up electric devices such as lights, and never need to worry about having to abandon your ride due to lack of light. Following a large number of requests for a dynamo wheelset, our HUNT began for a lightweight and durable wheelset that provides you with freedom from constant charging of lights for your on and off-road bike-pack adventures, fast commuting and daily winter training. Read More

The opportunity to open up your riding comes from bikes which have geometry designed to ride excellently with both 700c or 27.5" (650b) wheels. This combination works thanks to the extra volume in a 2" x 27.5” tire, providing an almost identical external tire diameter to a normal road sized 700c wheel with a 33mm tire, leaving the bike geo unchanged. What was needed was a bike that could accommodate the extra tire width, while still running road groupsets, geo and components. These bikes are increasing in popularity and availability continuously!

The MASON x HUNT 650B AdventureDynamo Disc wheelset is the result, featuring our proven wide tubeless asymmetric 650B AdventureSport rim, with our extra sealed and shielded 4Season Disc rear hub, and a seriously durable high 28 spoke count build (of Pillar's light and extremely strong triple-butted PSR spokes). Even with the 430g dynamo hub, this wheelset (at 1947g) is still lighter than many disc-brake wheels fitted to bikes as original equipment!

For the MASON x HUNT 650B AdventureDynamo Disc wheelset we collaborated with SON (Schmidt Original Nabendynamo), we had long been aware of just how highly regarded SON are for their durability and performance. Wilfred Schmidt is incredibly passionate about dynamos so our chats with him excited our inner geek. Wilfred and his team have been engineering their dynamo hubs in Germany since their first prototype 25 years ago.

SON dynamos are renowned for their market-leading efficiency. When your light is drawing power (light switched on), the efficiency of a SON hub is an impressive 65%, so at the German testing standard of 3 watts / 6-volt dynamo output (the rated output is achieved in the 700c (622)-wheel at approx. 16 km/h (SONdelux at 19 km/h), just 4.6 watts of your rolling power is used.

With the light off/unplugged (e.g. daylight riding), the graph below shows that for the SON28, there is half a watt extra rolling resistance compared to a high quality normal non-dynamo hub. For a bit of context, a 1-hour commute fast training ride, as very amateur cyclists here at HUNT, we would expect to produce somewhere between 160-250 watts average depending on our weight and fitness.

SON 28 is designed for high power output at low speed, so a lot of electricity for lights or for powering charging devices even when cycling slowly, a benefit that you will notice more on our 650b wheelset.

SON Dynamo graph

The deep thought and detail that goes into every SONdynamo sits well with our philosophy to HUNT for improvements in even the smallest details. The connectors used by SON are a great example; they are universal spade connectors available from most electrical retailers/suppliers/hardware stores rather than a connector that is unique to the hub design. This means that if the connector is lost or damaged far from home finding parts will be a whole lot easier.

Please note:

These wheels are adaptable for 12mm and QR axles. They are not suitable for 15mm axles.

Dynamo specific AC power charging devices or lights (Exposure Revo) are required to work with dynamo hubs. Read Less

Key Features

The Wheelset That Will Brighten Your Day and Night

Rims | 6066-T6 (+34% tensile strength vs 6061-T6) heat-treated. Tubeless-ready. Disc-specific. Asymmetric for balanced spoke tensions and a highly durable wheel build. 19mm deep | 25mm wide (internal) ETRTO 584x25. H-Lock bead-seat for easy and secure tubeless installation.
Tyres | Extra-wide 25mm rim bed works with 30c tires, but optimised for gravel and CX cyclo-cross tyres up to 54c and MTB 27.5"(650B) tyres up to 2.1". Also work excellently with clincher tires and tubes.
Hubs | HUNT 4 Season Disc J-bend spoke hubs with extra bearing shielding. 10 degree FastEngage 4-pawl freehub, with H_CERAMIK coating for enhanced durability. SRAM XD and XDR Driver available. Centre-lock disc mount.
Dynamo Front Hub | SON28 with adaptable axles. 3 watt / 6 volt output at 16 km/kmh tested to German standard K687 for output requirement. See SonDynamo Information Here.
Axles | Easily adaptable & we fit them for you. Fit all current axle sizes and are easy to change; Front - QR, Bolt thru 12/9mm, Rear - QR, Bolt thru 12x142, 12x135, 10x135.
See the full specs here
Weight | 1947g

Please note: If you require a 6 bolt adaptor you can purchase separately here

The Experts' View

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Full Specs

Rims

Tubeless-ready – designed to work excellently with normal clincher tires and tubes or tubeless tires. HUNT Black Shield tubeless rim tape fitted.
H-lock bead-seat up-kicks for easy and secure tubeless installation.
6066-T6 heat-treated aluminum alloy. (+34% tensile strength vs 6061-T6)
Asymmetric to balance spoke tensions.
Disc-specific tubeless-ready profile.
29mm outer and 25mm inner width ideal for 30-54mm tire widths.
19mm depth
Matt black anodized finish with laser etched graphics for excellent.

Spokes

J-bend cold drawn.
Made from high grade T302 (18/10) stainless steel wire by Sandvik Sweden.
Triple butted 2.0-1.6-2.0 (then 2.2 at the head for the patented Pillar Spoke Re-enforcement).
28 spokes laced 2-cross front and rear.
Black stainless treatment.

Nipples

Brass for anti-corrosion resistance.
Square body for external adjustment and hex head for easy internal adjustment/tensioning.
12mm length.
14 gauge
Black finish

Tires Info

Maximum tire pressure for this rim is 120psi when used with an inner tube and 100psi when running the wheel set-up tubeless. 100 psi is more than enough for any rider on road.
The maximum pressure of your tire may be lower than the maximum pressure for the rim - never exceed the maximum pressure written on the side of your tire.
Suitable for tires from 28mm up to 54mm wide.
Suitable tubeless road, gravel and CX tires are available from a huge range of companies including Schwalbe, Hutchinson (Sector/Overide Only), Panaracer, Maxxis and many more. Schwalbe Pro One 25mm tire weighs just 255g, is tubeless ready and is Schwalbe's class leading clincher racing tire.

Axle Size

These wheels are available with all existing disc brake road bike axle adapter sizes. All our axle adapters are easy to swap but we'll fit the adapters your bike needs to save you the work. After your order checkout is completed a simple form will show, as well as being sent to you in your confirmation email. The form allows you to select the axle size your bike needs, don't worry it also includes the option to tell us your bike model and we will find out and then fit the correct axles, plus we're happy to change them later at our cost if you don't quite get it right. Please note; this form is shown after you have completed your order. Please click on the Front Hub and Rear Hub tabs to see which sizes are available.

Front Dynamo Hub

We fit the axles you need, just complete the simple form shown after checkout:
All existing road/CX disc front axle standards are available including:

Quick Release (Quick release skewers included)
12mm Bolt Thru

All axle adapters are also available separately.
SON28 12mm.
Electric Power: 6V / 3W according to German government's road traffic regulations (StVZO)
German Mark of Conformity: ~~~ K 834 for 16" 29"
Efficiency: 65% at 15 km/h in 700c-wheel
No-Load Power Input: 0,5 W at 15 km/h in 700c-wheel
Magnets: neodym iron boron, 26 poles
Connection: 4,8 mm flat spades, 2-pin to connect without ground connection (special design without connectors)
Axle: hollow axle Ø 10 mm, strain-hardened stainless steel, (Center Lock rotor mounting system licenses by Shimano: aluminium 7075 T6)
Bearings: deep groove ball bearing 629 2RSH (SKF)
Hub Shell: aluminium 6082 T6
Sealing: alloy dust shields, rubber lip seals and pressure compensation system
Warranty: 5 years.
Weight 430.

Rear Hub

We fit the axles you need, just complete the simple form shown after checkout.
All existing road/CX disc rear axle standards are available including:

Quick Release (Quick release skewers included)
12x142 Bolt Thru
12x135 Bolt Thru (uncommon)
10x135 Bolt Thru (uncommon)

All axle adapters are also available separately.
7075-T6 heat-treated aluminium alloy freehub body.
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.
4 pawl, 36 tooth RapidEngage freehub, with an engagement angle of just 10 degrees
All freehub standards accounted for, including:

Shimano/SRAM
Campagnolo
SRAM XD Driver
SRAM XDR Driver

Forged and CNC’d 6061-T6 heat treated aluminium alloy body.
7075-T6 aluminium alloy axles.
Centre-lock disc mount. If you require a 6 bolt adaptor you can purchase separately here
7075-T6 aluminum alloy axles, 12mm front, 15mm rear.
Polished anodized black finish with laser graphics.

Bearings

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

Son Dynamo

SON28 | Highly efficient, faster and lower weight.

Drop-bar road and adventure bikes are designed for going fast, whereas many dynamo hubs were designed for town bikes. The rapid advancement and incredible efficiency of LED lighting compared to older halogen bulbs has meant that lights such as the Exposure Revo (available as a package with these wheels - please click here) would run at its whopping 800 lumen output at just 10mph. SON realised that by using a smaller/lighter generator, they could reduce drag by an impressive 20% and still achieve the 3 watt / 6 volt output (800 lumens on the Revo light) at just 11-12mph. Even at 10mph, you will get upwards of 500 lumens from the Exposure Revo light! The super-fast SON28 is the result of this innovative thinking... 20% better rolling resistance and lower weight, only 430g.

5 Year Warranty (incl. Bearings)

The unique SON Pressure Compensation System allows us to offer a you huge 5 year warranty on the SON Dynamo hubs including bearing wear.

SON Pressure Compensation System

All dynamos heat slightly during operation and then cool, the cooling of air in the hub body of most dynamo hubs can cause lowering air pressure inside the hub. This lower air pressure can lead to suction of water through the bearing seals significantly reducing the life of hub bearings. However, SON dynamos feature their unique Pressure Compensation System which consists of an air flow port on the axle cap and inside the axle (as shown below) and an air reservoir tube.

SON Dynamo Pressure Compensation Port

The SON Pressure Compensation System allows air pressure to be equalised, thus extending bearing life to a huge 50,000-100,000 kms. The tube (shown below) is long enough that water doesn't reach the end, and when the dynamo heats up again air pressure increases and any air and water is forced back out of the axle end of the tube preventing damage.

SON28 set-up, user guides and further info - please click here

Why only suitable for 12mm and QR, not 15mm?

"We would like to offer a 15mm option on these Dynamo wheels. Dynamo wheels (whilst being able to adapt to QR with a sleeve) cannot be adapted between 12 and 15mm (unlike a normal hub) due to the hub caps needing to be fixed and cabled for the dynamo to operate, and 12mm forks will not accept a 15mm cap as they have a small ridge above the axle interface. The AdventureDynamo wheels can adapt to any other current axle standard on the market, you just need to let us know what are your requirements by filling in the simple form on the confirmation page after checkout. Of course we are looking at 15mm as an option in the future, but it would probably need to be 6-bolt to allow the larger ball bearings; ball bearing size is very small on 15mm dynamo axles if fitted inside a centre-lock disc mount diameter and around the larger dynamo axle thickness (needs space for wire to pass through the bearing inner diameter unlike a normal 15mm hub axle).

Apologies to anyone who was hoping for a 15mm MASON x HUNT Dynamo option, it was a difficult decision to make for our first dynamo option, and we of course want to serve as many riders as possible. I hope this explains it a bit more, we would love to offer an option for you soon. Obviously since drop bar disc brake bikes are now becoming more stable in their standards hopefully these things will be simpler in future, here's hoping as it would probably make all our lives easier as riders. Thanks again and enjoy your riding, Tom Marchment (Hunt Bike Wheels | TheRiderFirm)

Low Weight, High Convenience - 800 Lumen Exposure Revo"

Exposure Lights tried, tested and much loved dynamo powered light. Providing up to 800 lumens of power that is only limited by your endurance, it is the new must have for adventure riding, touring and commuting. Plus it's manufactured just down the road from us here in Sussex, UK.

The Exposure Revo Dynamo light weighs a feathery 110g as it needs no battery, so as a package the light and hub weigh much the same as a normal hub and battery powered light, without that "oh, my lights run out of charge... I can't ride" nightmare.

Up to 1 hour of light even when your bike is stopped!

Stand Light Technology | When you stop, the Revo’s Stand Light provides ten minutes of light at 400 lumens running for up to an hour at a diminishing level. The retained energy allows you to quickly get up to full power when you start cycling again or get your tent up for a night in the wilderness. Click to find out more.

Warranty, HUNT Rolling Road Tests & Weight Limits

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.

All HUNT wheels models have to pass our harsh cobbled-rolling-road tests for rider weight limits, please see here for more details. 253lbs is the upper recommended rider weight limit for these wheels. Please include the weight of any luggage in your total rider weight when choosing the correct wheels. If a rider is over 220lbs then an experienced bike mechanic should check the wheel regularly and it is advisable to use minimum 25mm tires at max 100psi as this will reduce the fatigue on the wheelset. We are cyclists ourselves and do of course go above and beyond to offer excellent service if you ever do experience any issues. We carry full spares at very reasonable prices and offer complete support.

60 Day Ride & Return Period. We are certain you'll be impressed by the acceleration, low-weight, speed and durability of our wheels. We are cyclists and as such strive to offer class leading service and support. Buy with confidence, if for any reason you wish to return the wheels for a full refund of your order you can do so up to a full 60 days after you receive them whether they have been ridden or not. Please note we cannot offer refunds on wheels that have suffered from crash damage but do offer a crash replacement discount.

Tubeless Tire Options

These are only some of the options you can purchase your wheels. To see the full range, click here

Schwalbe G-One Allround Tubeless Tires - 650B x 1.5"

The Schwalbe Tubeless tires consistently win plaudits from journalists and customers alike. We have been testing them for a long time and have been very impressed. The G-One's are Schwalbe's brand new gravel tire, designed to offer a low rolling resistance yet offer plenty of grip on gravel and dirt tracks.

The highly respected German Magazine TOUR said: "Unbeatable with punctures... – the "self-repair" with sealant means that no tube can compare."

WTB Byway TCS Tubeless Tires 650B X 47mm

The Byway Road Plus tire brings supple plus-size traction and smooth riding characteristics even further into the dirt track. A smooth centerline and intermediate, diamon-shaped peaks provide great traction under power, while the more substantial side knobs protect the tyre from rocks or gashes.

WTB Horizon Tubeless Tires - 650B x 47mm

The Horizon Road Plus tire brings supple plus-size traction and smooth riding characteristics beyond where the pavement ends. A smooth centerline and all-weather herringbone pattern with cornering channels make anything possible.

Reviews

Bike Magazine and Website Experts' Views

Bikerumor Editor's Choice Award

"The best wheel award for 2018 goes to Hunt for making performance wheelsets with a hub dynamo. The Adventure Dynamo Disc is one option for 650B adventures, but their Search 29 Dynamo Disc mountain bikepacking wheels together with Mason Cycles are an equally solid option if you need a 700c/29er setup. Ride farther, charge you GPS during the day, and light the way at night – no batteries required!"

4.5/5 Stars Review

"Near-faultless performance and great value: a must for your list if you're looking into dynamo power"

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