Go Back   Team-BHP > Under the Hood > Modifications & Accessories > Tyre & Alloy wheel Section

Thread Tools Search this Thread
Old 26th March 2013, 23:07   #1
Senior - BHPian
KarthikK's Avatar
Join Date: Nov 2009
Location: Bangalore
Posts: 1,918
Thanked: 3,498 Times
Default Why does the wheel PCD differ across manufacturers?

We all know some common wheel PCD sizes used by manufacturers today -

- Ford uses 108 PCD
- Fiat uses 98 PCD
- Maruti uses 100 PCD
- Mercedes uses 112 PCD
- BMW uses 120 PCD
... and so on...

My question is - why do PCD sizes differ across brands? It is okay to say that car manufacturers like to maintain their individuality and stick to the size they have been manufacturing all along, but is that the real motive? I was reading up on the net about this topic and found some links for newbies, like the one below which explains what is PCD -

I couldn't find information on how PCD size affects vehicle performance in any manner. Does it? If it does not influence any technical aspect or provide any advantage, why do car makers stick to their specific sizes for wheel fitment patterns? Tyre gurus, please educate us on the motives of this practice.

Wouldn't it be so much easier for car makers to all follow a single universal PCD pattern? Not to forget, it would be easier for anyone trying to swap their wheels for new aftermarket alloys .

I couldn't find any thread dedicated to this query, so I created a new one. Moderators could please merge this thread if another similar one exists.

Last edited by KarthikK : 26th March 2013 at 23:15.
KarthikK is offline   (2) Thanks Reply With Quote
Old 27th March 2013, 06:33   #2
Senior - BHPian
Mr.Boss's Avatar
Join Date: Mar 2011
Location: Madras
Posts: 2,015
Thanked: 2,541 Times
Default re: Why does the wheel PCD differ across manufacturers?

PCD does affect the performance in terms of strength and durability.
Wider PCD can take more load (especially the cornering force) easily than the narrow PCD (stress/load on wheel bolts and wheel will be higher). But this calls for a wider dia hub --> wider dia brakes --> large dia rims.
So to avoid this we go with narrow PCD with increased number for wheel bolts/nuts to counterattack excessive cornering force.

Least possible PCD is chosen by OEMs to keep the least possible hub & brake size.

Excuse me for a poor explanation, I could not dig out my old data for clear explanation. Let me check this weekend and post the proper data.


Last edited by aah78 : 3rd February 2015 at 01:31. Reason: Post edited on request.
Mr.Boss is offline   (4) Thanks Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Similar interior designs across manufacturers - The latest trend? scopriobharath The Indian Car Scene 23 2nd July 2014 14:25
Does a Tire/Wheel Upgrade Damage Wheel Bearings?? Epic Technical Stuff 40 19th September 2012 15:29
Help Required: Procuring Alloy Wheel nuts for Palio (98 PCD conversion) basilmabraham Tyre & Alloy wheel Section 33 12th July 2009 12:40
Changing the wheel PCD audiophile Modifications & Accessories 5 17th September 2008 11:09
For Sale: Four 98 pcd Steel Rims & Wheel Caps in Blore greatDrive Shifting gears 1 5th October 2007 15:38

All times are GMT +5.5. The time now is 16:51.

Copyright 2000 - 2018, Team-BHP.com
Proudly powered by E2E Networks