i emailed hipshot and kahler asking what the largest size string they can fit in their tremolos. as of yet this is what i have. if anyone out there has either trem and a pair of calipers, it would be great if you could share your knowledge.
Thank you for your question!
There is builder in the UK who uses a .200" bass string with our saddles. He has never expressed any issues, so I will have to say a .200".
Bill Woolery" [hipshot]