Under-Rti

Looking at doing a few races next year. Signed up for Traka 360 after doing the 200 last year. Considering the Rift at the moment but curious what people’s recommendations are for events based in Europe, 200-500km

Hey! Recently bought a bike with the new 1x GRX. The bike came with the 10-45 cassette but in all marketing material for the updated group set Shimano mentions that you can fit 10-51 by only changing the cage to a long version… looked all over the place but I can’t find it for sale anywhere. Did anyone successfully convert theirs?