@owenh
Thanks for that. I have also heard of shaving a millimetre off the yellow bleed block, which makes sense. I am going to give it one final bleed and then look at cables etc It’s good to know others have the combination working.

I don’t understand why mountain biking nowadays is going down a hill and then back up again – rather than going out for a ride off-road.

@linusr Just had a look at some images online and yes it does use the same part. That’s an expensive way you have of falling, I suppose the right side is better than the wrong side! I usually just go over the handlebars.

@linusr A report back, of sorts. I have seen the GRX810 rear mech up close now and it has the exact same plastic component as the GRX400! I am surprised as I have never seen this before, I guess Shimano know what they are doing and it must be strong enough. I will stick with the 400 and see how it goes.

@linusr I will definitely report back. Thanks for your help.

@linusr Thanks for the video! He also has it working with GRX 812 so it will definitely work. I ordered the new rear mech earlier anyway in the hope it will be okay and it certainly will, so thanks again 😁👍

Linusr: Here is a link showing the plastic component: https://imgur.com/kESU5hw It’s probably okay, but as an integral part of the mechanism I don’t trust it. Especially as I ride throughout the year off-road on the moors in the dark with no phone signal. One of the limit screws has already made a dent in it and I haven’t even touched it. My choice is to run with it and hope for the best or find a better solution.

Thank’s for that. The Tanpan is a good option.

Thanks for the speedy replies. I don’t mind a 28/40 XT and 11-36 10 speed cassette as that is what’s on my 29er hardtail. I just wouldn’t mind a smidge more at the top end. The GRX 10 speed 30/46 with 11-36 cassette sounds perfect but if all the frame would take is a 44t then I’m not sure I want to chance it an be stuck with a crank and mech. I plan to be running 45-50mm gravel tyres, nothing too knobbly. I will do a bit more digging and report back. Thanks.

Am thinking of buying a Vagabond frameset. Hoping to go with the ‘GRX 400 groupset. Does anyone know if The ‘Shimano GRX 30/46’ crank would fit? It states its for a 68/70mm shell and has a Q factor of 151 with a chainlink of 46.9. My other option would be a ‘SRAM X5 42/28’ or ‘XT 28/40’ but I would prefer the higher gearing of a GRX crank. Thanks in advance.