5 stud to 4 stud rotors?

[NOLAW]

are 5 stud brake rotors able to be redrilled out to 4 stud?

[Ae92typeX]

Never had it done myself, but have heard of others getting it done.
However, if I was going down that avenue, id probably buy a blank and get it drilled from scratch. Not too $$ that way really.

[no_8wire]

Depends...some are and some arent ( eg the front on a ST185 can as they have only 5 holes, where as the rears on a sw20 cant as they have 10 holes..)

Do you mean is it legal?

I hope so...

[NOLAW]

cheers guys, il show youz an example of what i want to get to fit to my ke20 on the front...

http://www.trademe.co.nz/Browse/Listing ... d=95345062

could they be redrilled to 4x110?

[atmosports]

They should be able to, although in saying that I don't have one in front of me to check with all my measuring gear. I've done plenty of 5 stud rotors that have been re-drilled to 4 stud or 4 stud to 5/6 stud etc before & it looks like this is possible, the only probelm with doing this is everytime you need a new set of rotors you'll have to get them redrilled to suit.

[big_boy]

according to the rules about it they must be drilled before use as when they have be hot it weakens them if they are drilled also the new stud holes must be atleast 12.5mm away from the old ones or the edge & the bore in the centre must be correct for the hub or adquate sopport must be supplyed for the disk when a support is being used for the disk this support must be the same support that is being used by the rim & must be out of high quilty steel & of adquite depth to support the rim & disk fully

[no_8wire]

got a link to that info?

[big_boy]

no sorry just got the brosher that sim`s give me when i was trying to get disks for my car dew to them not being an off the shelf item & looking at useing something alse that fits

[Ae92typeX]

according to the rules about it they must be drilled before use as when they have be hot it weakens them if they are drilled also the new stud holes must be atleast 12.5mm away from the old ones or the edge & the bore in the centre must be correct for the hub or adquate sopport must be supplyed for the disk when a support is being used for the disk this support must be the same support that is being used by the rim & must be out of high quilty steel & of adquite depth to support the rim & disk fully

not saying you are wrong, but I know quite a few guys in aus re-drilling used disks. Would have thought they would have a rule like that before us...

anyone got a link to site to confirm?

[scope]

you could just buy some 5 stud mags for the front?

[NOLAW]

nah i like my rims nothing flash but they suit the car, il go talk to a engineering place and automotive place tomorrow and see what they think, cheers guys

[big_boy]

not saying you are wrong, but I know quite a few guys in aus re-drilling used disks. Would have thought they would have a rule like that before us...

anyone got a link to site to confirm?

thats the rules but how meny work shops will lissen to them for a cash job?
also im gessing most engering shops wouldent know that if you get them done there

i know anuf places that will bend the rules slightly for the right price i mean if you walk in there with some rotors & say drill these here & here most places will do it just because its work they may not fit them but they will still drill them

& how meny WOF guys are going to take off the wheels to check that all holes are 12.5mm away? my gess is none unless there doing other work & notice its a bit close

[Ae92typeX]

True true
edit: (regarding some places breaking rules generally for $$)

[atmosports]

I've re-drilled plenty of used rotors & then skimmed them & used them without issue. I've also re-drilled or machined plenty of rotors that'd have less than 12.5mm between holes. I have never ever had any issues structurally or with any authority & we used to on a regular basis redrill rotors to suit for a car manufacturer & they never questioned it & the certifiers they use have never questioned it & it's been pointed out to them.

[no_8wire]

I was going to say, it doesnt say anything about redrilling in the LVV cert guide...