Disk brake and wheel is moving: is my fork too long? In the  links I gave below, the website is in French but you can change the language.
Following this thread
I bought new bike components to build my own bike. In particular I bought Surly Steamroller frame and a this Surly fork. I have a QR system to attach this wheel because I wanted to install a disk brake system: disc, brakes.
When I am braking, the front wheel is moving on the left of the fork.
I tried to change the QR attach, tighten it very hard but same problem.
Is it possible I have an incompatibility issue especially between the fork and the frame?


edit: I followed the remarks from here and I tightened the QR even more but same effect.
Could it be my fork that is moving and not my wheel?
I notice that the spacers on top of my headset may be too long (4.5 cm of spacer) and could cause the fork to move, is it relevant? I think I will shorten my fork removing spacers.
The front wheel (of wheel set you linked to) has a 12x100 mm front axle (road thru-axle) but comes with an adaptor for 9x100 quick release axle, and the fork is made for 9x100 quick release axles. Did you install the adaptor kit correctly on the front wheel hub?
If you grab the front wheel by the tire close to the top of the fork and push/pull the wheel from side to side, do you notice the wheel moving at the quick release?
If it moves, there must be something wrong with how the quick release holds the wheel to the fork. Do the end of the axle of the wheel hub protrude out of the fork so the quick release can't make correct contact with the fork?
Minor notice:
The brake disc and brake caliper is not 100% compatible. The RT70 disk is ment for calipers using narrower brake pads, and the MT 200 uses wider brake pads. This means the brake pads is slightly larger than the brake area of the discs, but I'm not sure what the actual consequences will be in this case. Shimano has a document that state compatibility of their products:
https://productinfo.shimano.com/download/pdf/com/2.6/en