>>1646392I had assumed they were somewhere between 1.8 and 2.0 mm thick
and there is a bit of a clusterfug around the difference between the straddle cables for front and rear brakes
only thing for it is for me to measure a bunch of old straddle wires and compile a list
>>1646394not stored locally
but online resources that show up on google are
http://www.fa-technik.adfc.de/Hersteller/Shimano/SL.htmlhttps://manualzz.com/doc/53871434/shimano-sl-mt62-shifting-lever-service-instructionssays not to take it apart
but if your feeling bold and dont mind suffering be sure to take clear well lit pictures as you take anything like this apart
just for reference as to what part goes where
iirc shimano had a system called "fingertip control" it involves a spring inside of the shift lever that provides resistance to oppose the derailleur spring
and this made its way from down tube and bar con shifters into some of the old thumb shifters, so that might be waiting for you, idk will have to look up some more stuff
