[Hamfri]

I almost agree to shimano 105 r7000
But I also found a set r8000 (only shifters and derailleurs). And it is cheaper than full groupset r7000. I will only have to change the chain and the cassette (instead of the chainrings I have a power meter, the brakes can be left from the old ultegra 6700).
Does this make sense?

 

[Hamfri]

Not sure if the cable pull on the brakes is the same. It changed somewhere - either between 5600/6600 and 5700/6700 or between 5700/6700 and 5800/6800. There is a Shimano compatibility chart somewhere. I'll have to check on that.

Edit: On the brakes, looks like you're OK, just not optimal:

https://productinfo.shimano.com/#/com?cid=C-453&acid=C-456

Thanks!
Cables change is not a problem. But will there be a profit from r8000? If it is not much better than the r7000 in terms of shifting, then I see no reason to buy the r8000 ... although there may be differences.

 

[Hamfri]

Be aware you will probably need a new rear hub or modification of the existing one when going from 6700 to any 11 speed.

I've owned or tried about everything 10 and 11 speed shimano (non electric and caliper brakes only though) and the only difference in shifting I can detect between newer and higher end groups and lower or 10 speed is in the front. 11 speed front shifting has definitely improved upon 10. But I don't shift enough in the front or care about a split second enough to think it has any real impact for me. It's better, but it's not like I was dropping chains or getting a sore wrist from older 10 speed stuff so it's not the type of improvement I'd spend for unless I needed a new group anyway.

In theory, I can replace the left shifter 105 5700, and the rear derailleur at dura Ace 7900 10 speeds, for example. But I was told in the service that the spring at the front switch is already weak. It turns out that almost the entire group 6700 needs to be replaced. Most likely, I will buy r7000. If I don't find the p8000 as cheap as possible

 

[Hamfri]

I thought, and it seems I can buy an incomplete r8000 groupset! Will there be a difference in braking if I replace the old ultegra 6700 brakes with the new r8000 / 7000(dual pivot)?