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I think 100/90 for front is a bit "oversize"

front: 90/90 R18  -> Conti ClassicAttack   -   rear: 110/90 R18  -> Conti ClassicAttack
https://www.continental-tires.com/motorcycle/tires/motorcycle-tires/classic-classic-racing/conticlassicattack

Magura Type 305  (for two cables - stroke 44mm)
not sure, but i mean it is from an older BMW-Boxer bike