Graceland

When looking at rotrs and bells, and you need replacement rotors, how do you measure the PCD of the rotor?

some are 180mm, then some are 203mm and some are even 220mm


is the PCD the physical size (diameter) of the bell, or the distance between 2 opposing boltholes on the bell where the rotor attatches to?


Cheers

Graceland

anyone?

Mike Rainbird

iTrader: (3)

Centre of hole to centre of opposite hole.

Graceland

Cheers Mike

disregard my PM with the same question, which also has £10 attatched to it

Physio

Graceland

Rite, i've just measured

the distance between the holes opposing each other for the mounting bolts is 205mm and the overall diameter of the bell is 220mm

now i'm confused

Graceland

or it may be 203mm, as my measuring isn't accurate with the bolts still in place

vroooom ptssssh

Rotors and bells, you been on the american car forums?

S1

PCD = Pitch Circle Diameter, the diameter of the circle of the studs.

I assume you're talking about where the bell attatches to the rotor, not the PCD of the wheel studs.

dojj

iTrader: (3)

you measure between the centre of one hole and the centre of the opposite hole on the actual disc inner bit where they bolt on
there are different discs on the market so you would possibly best off trying to get replacements from one of the big names
as far as i know they are all of a certain standard but you do get these wierd ones from time to time

CosKev3

PM for you Gracie

Martin-Hadland

iTrader: (2)

you will probably find it's 203.2 which is a popular pcd, let me know if i can supply you with bells or discs......

NUTS RuS

iTrader: (35)

203.2 is off a 325mm disc.

230.2 is for a 330mm kit.

Don't leave it until the last minute mate if you need it sorting