Kyllachy

Hi...have bought two mavic ksyrium rear wheels to make one good wheel I wish to buy a lh 7mm tap to clean threaded holes in rim to enable good spoke fitting ...Can't find the exact spec anywhere as there are at least three pitch differenes ...1mm....75mm....5 mm pitch for 7mm lh taps...Can anyone tell me the correct size....Many thanks...

maddog34

tell yourself with this tool... it will come in handy in the future too.
https://www.ebay.com/itm/12439618345...bdb3c59b9a1cfd

Dan Burkhart 

You do know those will be left hand threads, yes? As to the pitch, I couldn't tell ya,

Kyllachy

Yes ...I put LH...I think the thread is finer than standard....trust them to make it special eh...many thx

maddog34

do you have a well stocked Hardware store near you? Take one with you, match it to any diameter bolt's thread... you now know the pitch of the part in question... A Proper matched thread will lock onto the sample thread, No Slop or rocking, no light showing when silhouetted.

PS, A .75mm Pitch threads are REALLY RARE.. and Mavic is a French company,. sooooo... yep, probably a .75mm pitch See: Peugeot BB threads, Peugeot headset diameters, Simplex, MAFAC, etc.