Posted on May 31, 2022 by Tyler Benedict

The all-new carbon GRX wheelset drops ~350g off the alloy set’s claimed weight, shedding all of that weight from the swap to carbon rims.

The new option provides a drastic reduction in rotational mass, so it should provide a huge improvement in acceleration. And, they do that while getting both wider and deeper!

The new WH-RX870-TL GRX Carbon wheels will only come in 700c versions, whereas the original alloy models launched with 700c and 650B sizes. All are tubeless ready.

The new carbon rim is 25mm wide internally and 32mm deep, compared to 21.6mm internal and 22mm deep for the alloy rims. So, presumably, a bit better aerodynamics, yet tough enough for (in their words) serpentine singletrack or bushwhacking along old goat paths.

While some of their sponsored riders have opted for Dura-Ace wheels in the past, these shallower GRX Carbon wheels provide the stiffness and lighter weight, but in a shallower depth that should be better for the crosswinds at courses like Unbound. And probably a bit more compliant.

External width is 30mm, and they’re compatible with 32mm to 50mm tires. Here’s the full spec list:

MSRP for the wheels is $1,399, almost a thousand dollars more than the alloy version, but still a bit of a bargain for a wide, light carbon wheelset…and especially one from Shimano.

Tyler Benedict is the Founder of Bikerumor.com. He has been writing about the latest bikes, components, and cycling technology for 14 years. Prior to that, Tyler launched and built multiple sports nutrition brands and consumer goods companies, mostly as an excuse to travel to killer riding locations throughout North America.

Based in North Carolina, Tyler loves finding new travel adventures to share with his family and is always on the lookout for the next shiny new part to make his bikes faster and lighter. And, he’s totally gone down the NFT rabbit hole.

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These sounds like an excellent do it all wheelset at a very competitive price.

with hubs that will last at least 3 weeks.

Gotta hand it to Shimano for sticking with cup-and-cone even on a $1400 wheelset!

doesn’t mention if they are hookless or not

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