Motley Crue star Tommy Lee has confirmed bassist Mick Mars' health is the main reason behind the group's decision to wrap up touring after one final trek.

Singer Vince Neil first revealed the truth behind the upcoming farewell tour this summer (13), but Mars, who suffers from incurable ankylosing spondylitis, played down the drama insisting that "any rumors regarding a farewell tour due to my poor health are Bs (bulls**t). I am doing fine".

But now Lee has opened up further about the farewell tour, insisting that Mars' health is a major factor.

He says, "He has a spinal disease that's slowly fusing his vertebrae together. It's one of those things that's treatable, but not curable. So it's just progressively getting really worse and it's painful for him, so he doesn't want to tour much longer. I can't say I blame him."