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Berd Sparrow String Up Ultralight 1,065g Gravel Bike Wheels

berd sparrow gravel wheels
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The new Berd Sparrow gravel wheels use their lightweight 2.5g Polylite spokes and a new hubset and rim to create an incredibly light tubeless-ready wheelset. It’s also tough, rated for bikepacking with a 250lb rider+bike suggested weight limit.

rim profile of berd sparrow gravel wheels

The new rim is 25mm wide internally, designed for tires from 28-50mm wide. It gets a unique semi-hooked design, with a mildly rounded bump rather than a hard hook, which they lets it safely hold tires with up to 70psi with 28c tires.

closeup details of berd sparrow gravel wheels with string spokes

Their Talon Hubs, which use a proprietary hooked flange that the spokes loop around, now come in a gravel/road version with 12×100 front and 12×142 rear hub spacing. They have a 36-tooth dual-sprung ratchet inside and 28 spokes per wheel. Available with XDR, HG and Micro Spline, so it’s compatible with all of the cassettes used on the latest 12-speed GRX groups.

closeup details of berd sparrow gravel wheels with string spokes on talon hubs

The Berd string spokes are light, but also allow the wheel to be very compliant. They say this makes them very comfortable and improves traction, but they’re still laterally stiff. They’re also very strong, with a higher pull strength than common steel spokes, and have better vibration damping. Geek out on the tech details here.

Put together, the gravel wheels weigh just 1,065g without tubeless tape or valve stems. Or 1,108g shipped with tape and valves installed, ready to roll out of the box. MSRP is $2,195 as described. They’re also available with Industry Nine or Onyx hubs for $100-$200 more, respectively. The I9 option has a Campy N3W freehub option.

BerdSpokes.com

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jonathan
jonathan
1 month ago

it’s funny now that 25mm is deemed only suited for tires up to 50mm. My 2019 xc bike came with 25mm internal, designed for use with 55-60mm tires.

Bike Rider
Bike Rider
1 month ago
Reply to  jonathan

It’s never been a hard rule and 10mm isn’t a huge difference in that range. The recommendation here is in line w/ the current trend to narrow the difference between the widths of a given tire and the rim.

I ran a 2.2″ tire on a 15mm internal width rim down 3/4 of the GDMBR. I’m not recommending it but I am still alive.

mud
mud
1 month ago

I have the Spinergy GX wheels, which use a similar synthetic spoke they call PBO. The only problem with theirs is they don’t use a traditional nipples. You have to remove the tire and rim strip to adjust tension with a proprietary nipple wrench. It looks like Berd solved this.

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