De Snelste Gravelwielen ter Wereld
Super Aerodynamisch met Trillingsabsorberende Spaken
De Sparrow50 Gold is 14% aerodynamischer dan onze vorige generatie Sparrow, met dezelfde trillingsdemping die geen aero-concurrent kan evenaren — een combinatie die in onze finishmodellen wielen zoals ENVE en Zipp voorbijstreeft zodra het gravel ruwer wordt.
Gouden Medaille Spaken
Met twee olympische gouden medailles, twee olympische bronzen medailles en meer dan 50 XC Wereldbeker-podiums in de laatste 2 seizoenen zijn Berd-spaken de meest winnende XC MTB-spaken ter wereld.†
Getest in de Windtunnel +
De Sparrow50 Gold heeft een 50 mm diep aerodynamisch profiel — onze snelste wielen in de wind ooit.
Kenmerken
The Sparrow50 Gold wheels were designed from the ground up to be fast on gravel. We combined aerodynamic and vibration-damping test data to model finish times using the data from our engineering white paper. The model accounts for aerodynamic drag, rolling resistance, and the vibration-induced losses that Berd spokes uniquely reduce. Results are intended for comparative purposes only — the calculator uses simplified assumptions for rider aerodynamics and does not account for elevation, drafting, or variable pacing.
Finish time vs. Sparrow50 Gold
Surface categories: Smooth pavement is clean tarmac with negligible vibration losses. Cat 1 (Hard Packed) is hard-packed fire roads and smooth dirt. Cat 2 (Common Gravel) is typical mixed-surface gravel with moderate roughness. Cat 3 (Chunky / Rough) is chunky, loose, or washboard surfaces where vibration losses dominate.
Velgen
| Velgmateriaal | Koolstofvezel |
|---|---|
| Interne Velgbreedte | 30 mm |
| Velgdiepte | 50 mm |
| Externe Velgbreedte | 38 mm |
| Tubeless Compatibiliteit | Ja |
| Wielmaat | 700c (29″; 622 mm Bead Seat Diameter) |
| Velg ERD | 541 mm |
| Velggewicht | 420 grams |
| Hoekgebogen Spaakgaten | Ja |
| Aantal Gaten | 24 Holes Front and Rear |
| Remcompatibiliteit | Disc (Centerlock) |
Naven
| Type Voornaaf | Berd Talon ESL-R |
|---|---|
| Afmetingen Voornaaf | 12 x 100 mm or 12 x 110 mm (both convertible to 15 mm) |
| Type Achternaaf | Berd Talon ESL-R |
| Afmetingen Achternaaf | 12 x 142 mm or 12 x 148 mm |
| Vrijloop Compatibiliteit | SRAM XD, Shimano Microspline, Shimano Hyperglide, or Campy N3W |
| Vrijloop Materiaal | TriCoat™ Aluminum |
| Vrijloop Mechanisme | 36-Tands Ratel met Hoge Ingreep |
| Naaffabrikant | Berd |
| Remtype | Centerlock |
| Voornaaf Lagers | 2 x 6803 bearings (17 x 26 x 5 mm) |
| Achternaaf Lagers | 2 x 15267 bearings (15 x 26 x 7 mm), 2 x 6802 bearings (15 x 24 x 5 mm) |
Spaken & Nippels
| Add a Berd Service Kit to your new Berd wheel order and receive all of the tools and supplies needed to service your wheels — including spare spokes! | |
| Voorspaken | Berd PolyLight Spokes, 259 mm |
|---|---|
| Achterspaken | Berd PolyLight Spokes, 259 mm |
| Inspaakpatroon | Tweevoudig Gekruist Voor en Achter |
| Nippels | Sapim Aluminum Double Square Secure Lock, Black |
Bandeninfo
| Tubeless Ready | Velglint en ventielen geïnstalleerd |
|---|---|
| Bandtype | Tubeless, Clincher met binnenband |
| Bandencompatibiliteit | 40 mm – 60 mm (1.50″ to 2.35″) |
| Actual Measured Tire Widths | Schwalbe G-One RS Pro 700 x 45 mm: 45.6 mm Schwalbe G-One RS Pro 700 x 50 mm: 50.9 mm Schwalbe G-One RS Pro 700 x 55 mm: 55.7 mm Continental Dubnital Rapid Race 29 x 2.2: 55.3 mm |
| Maximale Bandenspanning | 60 psi (4.14 bar) |
Gewicht
| Gewicht Wielset | 1.298 gram (zonder velglint en ventielen) |
|---|---|
| Gewicht Voorwiel | 600 gram (zonder velglint en ventielen) |
| Gewicht Achterwiel | 698 gram (zonder velglint en ventielen) |
Algemeen
| Beoogd Gebruik | Gravelracen en -rijden |
|---|---|
| E-Bike Goedkeuring | Ja, tot 60 Nm/500 W |
| Gewichtslimiet | 280 lbs / 127 kg |
| Assemblagemethode | Handmatig ingespaakd in Hopkins, MN, Gecentreerd door TRUDI |
| Garantie | Beperkte Levenslange Garantie en Gratis Crashvervanging |
Naast ons standaardaanbod met de Berd Talon ESL-R naaf, kunnen Sparrow50 Gold wielen ook worden opgebouwd met Industry Nine of Onyx naven. Aangepaste naafbestellingen vereisen 4–6 weken levertijd.
Industry Nine Naven
Industry Nine J-Bend naven zijn verkrijgbaar in Hydra2 en Solix modellen. Na bestelling ontvangt u een e-mail voor opties. Reken op 4–6 weken.
Onyx Racing Products Naven
Alle Berd wielen zijn verkrijgbaar met Onyx Racing Products Vesper en Classic Hook Flange naven. Na bestelling ontvangt u een e-mail voor opties. Reken op 4–6 weken.
Hub Maintenance (Talon ESL-R Hubs)
| Freehub Maintenance | Greasing the internal ratchet mechanism is recommended every 3,000 km for optimal performance. To service the freehub, remove the end cap and slide the freehub body off the hub shell. Remove all internal components in order: the purple washer nearest the freehub body, the ratchet springs, the ratchet plates, the purple washer nearest the hub body, and the freehub axle bushing. Clean all parts thoroughly with a solvent-based degreaser, allow them to dry completely, then apply a thin layer of DuMond Pro X Freehub Grease to all contact surfaces. Reassemble the hub, ensuring all parts are placed in the correct orientation as shown below. |
|---|---|
| End Cap Grease | A thin layer of waterproof lithium complex grease is pre-applied to the exterior bearing surfaces between the bearings and end caps. This blue grease acts as a barrier against water and dirt intrusion. Inspect the grease after washing your bike, after wet or muddy rides, or every 3,000 km — whichever comes first. If the grease appears contaminated with dirt or has washed away, clean the surfaces and reapply a thin layer of Lucas Marine Grease (waterproof lithium complex) before reinstalling the end caps. |
| Bearing Maintenance | Inspect the bearings every 3,000 km for smooth rotation and any roughness or play. Bearing service should be performed by a qualified bicycle mechanic using proper extraction tools and a bearing press designed for this purpose. Do not attempt to remove or install bearings with improvised tools, as this can damage the hub shell or the bearing seats. |
Spoke Maintenance
| Spoke Tension | Sparrow50 Gold wheels are built at the Berd factory using our Berd Wheel Stress Relief Machine, which removes significantly more stretch from the spokes than a traditional tensioning process. As a result, these wheels are highly stable and will most likely never need to be retensioned. If you do notice minor tension changes after extended use, turn each nipple up to 2 full turns using a nipple wrench from the tire side, while holding the spoke with the Berd spoke holding tool to prevent twisting, followed by minor truing and dish adjustments. |
|---|
Cleaning and Cosmetics
| Wheel Cleaning | The best way to clean your hubs, rims, and Berd spokes is with mild dish soap and water — we highly recommend Dawn. A gentle wash will remove dirt and trail grime and will restore white spokes to a near-new appearance. Note that dark-colored grease (such as hub or chain grease) can permanently stain white spokes and is very difficult to remove once absorbed, even with solvents. While Berd spokes are highly resistant to most solvents, we do not recommend solvent-based cleaners because they offer no benefit over soap and water for routine cleaning. Watch: How to Clean Berd Wheels |
|---|---|
| Spoke Color Maintenance | Berd spokes are naturally white. Black spokes and other colors are achieved with an alcohol-based coating. While the coating is durable, spoke coloring will gradually become more matte over time with normal use. Citrus-based enzyme cleaners and other non-soap cleaners have been shown to partially strip this coating and should be avoided — use only soap and water. Black spoke coloring can be refreshed at any time with a Berd Spoke Coloring Kit to restore the full dark finish. |
Customer Reviews
Love them and they look amazing as well!
Wanted to upgrade my gravel wheels for a while now.
I am running a custom custom wheel set, Enve hubs and Duke rims with Berd spokes. Which I really liked.
Was interested in the Enve G SES 6.7 or the 4.5s, but something was holding me back (price, weight).
Then the new Sparrow 50 were launched.
They are a big step up from my current set.
Most noticeable the aero on faster sections,is a big improvement. The weight is on another level
when off the road on mtb trails.
I am in love with them, and would buy them again.
If you are looking at the current gravel wheel offerings, you have to put the Berd Sparrow 50 on your list!
So light and smooth
I love these wheels! They look amazing and they're so fast. I increased my average mph on a gravel segment on my commute by 2.5mph!!
They handle crosswinds like my 25mm deep wheels and climb well too.
They feel stiff out of the saddle but are also incredibly smooth.
I am pumped!
† Gebaseerd op het hoogste aantal olympische gouden medailles en het hoogste percentage UCI Wereldbeker XC-overwinningen door een spaakenmerk tijdens de seizoenen 2024 en 2025.
Berd staat voor Bike + Nerd, want dat is precies wie we zijn. We gebruiken echte engineering, echte tests en echte data om de beste fietswielen ter wereld te bouwen. WEES EEN BIKE NERD.
