Joined: Jul 2014
Posts: 1,397
Likes: 169
From: Milton Keynes, England
Bikes: 2.6kw GT LTS e-tandem, 250w Voodoo, 250w solar recumbent trike, 3-speed shopper, Merlin ol/skl mtb, 80cc Ellswick
You can always cross them. My Tiagra rear derailleur works great with both Altus, Nexus snd LX shifters, and both 8/9sp cassettes. And i use a Claris front derailleur with my current 2/3sp XT front shifter which has an mtb-only dynasys rear set-up.