Aerosmith’s officially finished touring — the iconic rock band just announced they’ve made the hard choice to retire from the concert circuit … ’cause Steven Tyler‘s voice finally gave out.They broke the news in a heartfelt Instagram post Friday … saying that after more than 50 years of shows, they’ve made the difficult choice to retire.

The main impetus behind the decision … the group says Tyler’s voice — which they call “an instrument like no other” — just doesn’t sound the same anymore because of his vocal injury despite his months spent working with top doctors.

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GettyThe group says touring has been the joy of their lives, and they thank their legions of fans and their crew for making all their shows possible — but, without Tyler at 100% … they say they can’t keep on hitting the road.

Aerosmith ends on a positive note … telling their fans to dream on and thanking them for making their dreams come true — a reference to their hit 1973 song of the same name.We’ve told you all about Steven’s voice troubles … with sources telling us in September of last year — in the middle of the group’s “Peace Out” farewell tour — that his vocal cords were “mangled.”The group announced a pause on the tour at the time … but, looks like their show in Long Island that month will forever be the band’s last.

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GettyWorth noting … this retirement only mentions touring — so, a studio album isn’t technically out of the question, though it seems to all hinge on Tyler’s voice.Either way … Aerosmith’s touring days are done — leaving fans with a ton of “Sweet Emotion.” It was fun while it lasted