Shimano GRX RX 815 2x groupset review

James Stout gets to grips with a Di2 equipped 2x GRX groupset

(Image credit: Image: Kevin Fickling)
Cycling Weekly Verdict

If you’re building a mixed terrain bike or perhaps looking for a single bike to cover everything from singletrack to sportives, this is a great groupset. The cost is in line with Shimano’s other di2 offerings but the improved hood feel and sensible gearing make it my favourite groupset for just about any drop bar activity aside from dedicated pursuits like time trials and crits.

Reasons to buy
  • +

    Clutch rear derailleur

  • +

    Great hood feel and braking

  • +

    Wide gear range

Reasons to avoid
  • -

    Slightly heavier than a road groupset

  • -

    You might need to buy XTR pedals if you have fussy knees

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Gravel racing has always been about bodging together parts of road bikes and mountain bikes to make them work. This is especially true with groupsets which never quite offered the range and robustness that gravel racers were looking for. For years I’ve run all kinds of converters and compromises in order to run a mountain bike rear derailleur and cassette with road shifters and crankset. After Shimano released its Di2 mountain bike gears I, and probably hundreds of others, bombarded them with requests for a two-chainring setup with an XTR rear derailleur and a road front.

>>> Best gravel bikes

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