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Shimano GRX goes wireless: first look at the new GRX Di2 12-speed groupset

Ever since Shimano released a 12-speed mechanical version of their GRX gravel groupset, we’ve been patiently waiting and anticipating the release of an electronic Di2 version.

We didn’t have to wait too long, as less than six months later, Shimano introduced the GRX RX825, introducing semi-wireless shifting to the GRX range for the first time.

GCNSi Richardson, from , was very excited when he heard about the new group and was even happier when he had the opportunity to try it out from the beginning. So after adding it to his trusty Canyon Grail, Si headed to the Shimano Experience Center in the Netherlands to test out the new groupset.

Check out their full breakdown and first impressions of the group in the video above, or check out a quick rundown of the new group’s key features.

Read more: Gravel groupset hierarchies guide: explanations of Shimano, SRAM and Campagnolo groupsets

Shimano’s first 12-speed Di2 gravel groupset

Both the 12-speed and Di2 versions of the GRX group existed before, but the GRX RX825 is the first to combine them for the first time.

The first 12-speed version of the GRX was launched last year, while an 11-speed Di2 version has been available since the GRX first came to light in 2019.

GRX RX825 is only 2x

In a move that will surprise some, GRX RX825 is only available in a 2x configuration and not 1x.

The original 12-speed mechanical GRX is available in three different configurations. The ‘Unbeatable’ and ‘Unstoppable’ configurations are 1x, but Shimano also offers a 2x version which they call ‘Undroppable’.

Sharing the same gearing options as Undroppable, the GRX RX825 is available with a 48/31t crankset and an 11-34t or 11-36t cassette, although it is also possible to replace it with a 46/30t of the GRX 600 series, Shimano’s most economical. cluster.

Shimano GRX receives semi-wireless Di2 shifting

Until now, Di2 GRX groupsets have used Shimano’s old cabled system, whereby the levers and derailleurs are connected to a centrally housed battery via cables.

That was their only system when GRX first came out and was also used across their entire road range, but since then the road groupsets have also become a semi-wireless system, and the GRX RX825 is the first of the gravel groupsets. of Shimano to do the same.

On a semi-wireless Di2 groupset, the shifters are not connected to the battery via cables, although the rear derailleur is.

Shifters optimized for widened handlebars

The new groupset required new levers and Shimano has chosen to optimize the flared handlebar designs.

This makes sense as most gravel bikes now use handlebars with flared designs as they offer greater comfort and control when riding off-road.

The brake levers also feature non-slip textures for added safety.

Learn more about Shimano’s latest GRX Di2 groupset here. To stay up to date with the latest cycling technology, head to the Tech News section on the GCN website.

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