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Three Piece Wheels

n15m0

By n15m0,
in General Automotive Discussion

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51jay Mentor

51jay

Posted
Posted

1 piece wheels are usually cast and usually heavy but probably better for all round on road use.

The 2 and 3 piece wheels are usually much better quality, forged and much lighter ie my 18x 9 Weds Sports Racing wheels with 265 35 tyres are lighter than the stock 16x6 with 205 55.

djr81 Grand Master

djr81

Posted
Posted
Hi,

Just want to get an opinion from those in the know.  Whats the big deal with three piece wheels anyways? Or two piece for that matter?  how are they better compared to one piece wheels tht can be bought at wheel shops in oz??

Cheers

Jon

A two piece rim is as good as a three piece, so don't get too hung up about it. A three piece allows the manufacturer to vary the rim offset& width without having to utilise a heap of different production options.

A two piece will usually be lighter than a one piece, because the transition from the centre section to the outer section is not dictated by casting considerations. One of the key criteria (for me anyway) when buying rims is their weight. The lighter the wheel - the lower your unsprung mass which is all to the good. You will find much of what is sold in the local tyre shops is ex China & some of them (Not all!) can be quite heavy. As with most things - you get what you pay for.

djr81 Grand Master

djr81

Posted
Posted
I always wanted to know that too. What arre the advantages of lighter rims?

Put simply, the main advantage from lighter wheels is a lower unsprung mass. The job of the springs/dampers/roll bars is to keep the wheel/tyre on the road surface. Obviously the lighter the wheel/tyre combination the less work the suspension has to do to keep them on the road. End result: more grip.

A secondary benefit is that it can reduce the vehicle mass as a whole. A light set of 17's can be up to 10kg lighter than an equivalent set of 19 or 20 inch rims.

MacGuyver Mentor

MacGuyver

Posted
Posted

I always thought that 2 and 3 piece wheels weren't as strong as say a forged single piece rim. I have forged Buddy Club P1's which are pretty light and tough as! Aren't say 2 piece rims composed of an interior piece welded on to the outer part of the rim? I'll bet it isn't easy to fix 2 or 3 piece rims, depending on the type of damage you have of course. 2 and 3 piece are much lighter but also usually more expensive!

"Games don't affect people. If Pacman affected us as kids, we'd all be running around in darkened rooms munching on pills and listening to repetitive music."

djr81 Grand Master

djr81

Posted
Posted
I always thought that 2 and 3 piece wheels weren't as strong as say a forged single piece rim. I have forged Buddy Club P1's which are pretty light and tough as! Aren't say 2 piece rims composed of an interior piece welded on to the outer part of the rim? I'll bet it isn't easy to fix 2 or 3 piece rims, depending on the type of damage you have of course. 2 and 3 piece are much lighter but also usually more expensive!

"Games don't affect people. If Pacman affected us as kids, we'd all be running around in darkened rooms munching on pills and listening to repetitive music."

2 piece rims have the centre section bolted to the outer, not welded. I have had mine repaired, you just have to unbolt the outer section first.

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