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Cycling Weekly
Cycling Weekly
Sport
Anne-Marije Rook

Shimano 12-speed GRX Di2 long-term review: 2x shifting for off-road riding isn’t dead after all

Shimano GRX Di2 RX825.

It had been a while since I last rode a 2x setup anywhere but on the road. Coming from a cyclocross background, I was an early adopter of the 1x logic that SRAM introduced to the ‘road’ category with its CX Force 1 groupset in 2014. The improved chain retention, reduced mechanical complexity, and lighter overall weight made sense for off-road riding. And, when gravel riding gained popularity, I never even considered running a 2x setup on my gravel bikes, convinced that less was more—especially in the muddy and wet conditions I typically ride in. It was an easy choice, too, as SRAM has all but phased out 2x cranksets in its off-road lineup, and Campagnolo embraced 1x with its Ekar groupsets as well. Shimano, however, has taken a different approach: while its 12-speed mechanical GRX groupset offers a 1x option, the electronic Di2 version remains staunchly 2x-only. At first, it was easy to dismiss Di2 for that limitation—but lo and behold, not only did I not mind relearning to use a front derailleur, I’ve actually come to appreciate it.

I’ve been riding the Shimano GRX Di2 RX825 groupset for the past eight months or so, and while there certainly are some drawbacks to the groupset, I’m surprised to find that I’m in no hurry to revert back to a 1x.

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