Rear derailleur moves to much for each click - tried everything Two years ago I build a bike (flat bar) with SRAM 1x11. Around a month ago the rear-derailleur broke (guide pulley broke).

I bought a new rear derailleur: Shimano 105 RD-5800-GS.

After installation shifting got bad. The rear derailleur moves to far for each click, so sometimes it changes two gears for one click. It only takes 8 clicks to move the chain from the inner sprocket to the outer - and only 8 clicks to move it back. In other words it seems like the derailleur moves around 5 millimeters instead of 4 millimeters.

I have another bike (road bike) with Shimano 105 5800 group (2x11). I tried to take the wheel and the rear derailleur from that bike to the bike with the problem. It did not help - problem was the same.

I bought a new shifter: "Shimano XTR SL-M9000-R Rapidfire Plus Shifting Lever - 11-speed". Problem was still the same after installation. (Cable was also changed).

I bought and installed a new derailleur hanger. Problem is still the samme.

I have not had any crashes.

I think I have tried everything. Any ideas, what can I try ?
So you originally had a have a SRAM 1x11 derailleur and matching shifter then swapped the rear derailleur for a Shimano 105. 

That is your problem right there. Shimano derailleurs are not compatible with SRAM shifters. The length of cable the shifter pulls for each gear change is different between SRAM and Shimano (and between Shimano road and mountain groupsets at 10 speed and above). That's why the derailleur is moving the incorrect distance for each gear shift.

You need a SRAM derailleur that is compatible with your SRAM shifter. You can replace the guide wheels in all but the cheapest derailleurs, so you could fix your original SRAM derailleur and re-install that.

Or you could of course replace the shifter with one compatible with whichever Shimano derailleur you choose to run.