A new 12-speed Shimano GRX groupset has been spotted at Unbound 2023.
The pictured groupset is mechanical and built around a 10-45t XTR M9100 cassette. Thus far, we’ve only seen a 1x build.
The groupset was fitted to the bike of Shimano-sponsored Taylor Lideen, who rode Unbound XL this weekend – a brutal 350-mile version of the season’s biggest gravel race, starting the night before the 200-mile main event.
Here’s everything we know so far about 12-speed Shimano GRX – and some questions that are left unanswered. Wide-range 10-45t cassette tells a larger story
Shimano GRX 12-speed has been spotted on Taylor Lideen’s bike at Unbound. Ben Delaney / Our Media
The groupset pictured is paired with a 10-45t 12-speed XTR M9100 mountain bike cassette.
This signifies three big changes for Shimano GRX. 1) 12-speed takeover Unsurprisingly, GRX is now 12-speed. Ben Delaney / Our Media The key change is the move to 12-speed from 11-speed.This brings Shimano GRX in line with the brand’s road and mountain bike groupsets.It also brings GRX closer to its competitors – SRAM’s gravel-specific XPLR groupsets have been 12-speed from the off, with Campagnolo going one step further at 13-speed for its radical Ekar groupset . 2) Bigger cassettes The 10-45t cassette provides a wider gear range than Shimano’s existing 1x GRX arrangement. Ben Delaney / Our Media The 10-45t cassette also tells us Shimano is increasing the capacity of its 1x GRX derailleurs.Current GRX groupsets top out at 42t for a 1x setup .The shift to a […]
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