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Old 06-23-2013, 12:00 PM   #1
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Q: Ford 18" Titanium vs 18" ST (wheel)?

Focus Titanium optional 18" 5-spoke wheel (in handling package)
vs
Focus ST 18" Y-spoke wheel

Both come fitted with 235/40R18 tires.


Are both wheels the same width and offset ??


How much does each wheel weigh ??


Thanks in advance.


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Old 06-23-2013, 12:07 PM   #2
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Yes they are the same width and offset. The weight difference should be negligible but I don't know by how much.
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Old 06-23-2013, 12:45 PM   #3
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Quote:
Originally Posted by dyn085 View Post
The weight difference should be negligible but I don't know by how much.
Both are around 26lbs
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Old 06-23-2013, 01:05 PM   #4
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Quote:
Originally Posted by jsr72 View Post
Both are around 26lbs
The ST wheels are closer to 25 lbs according to the ST owners guide supplement.

Quote:
WHEELS
Wheel Specifications
Diameter and width Offset
Backspacing
Center bore
Weight
18 inches x 8.0 inches 55 mm
6.673 inches
63.3 mm
25 lbs (11 kg)
Your ST vehicle is equipped with unique wheels matched to the tires. These wheels are more susceptible to damage due to their diameter, width and low profile tires. To avoid damage to your wheels:
• Maintain proper tire pressure.
• Exercise caution when using automated, commercial car washes. Hand washing or using touchless commercial car washes without mechanical tracks is the best way to avoid potential damage.
• When installing wheels, always torque lug nuts to specification with a torque wrench.
• Inspect your wheels for damage on a regular basis. If a wheel is damaged, replace it immediately.
• In the event that you encounter an abnormally harsh impact, inspect the outer diameter of your wheels, both inside and out, for damage.
The Ti wheels are a bit heavier, I think the ford racing versions were listed around 30 lbs.

http://www.fordracingparts.com/parts...KeyField=22347

The ST wheels from ford racing are listed at 30.1 lbs
http://www.fordracingparts.com/parts...KeyField=22774

Now why the aftermarket ones are listed as being heavier I'm not sure.
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Old 06-23-2013, 01:21 PM   #5
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Quote:
Originally Posted by suss6052 View Post
The Ti wheels are a bit heavier, I think the ford racing versions were listed around 30 lbs.

http://www.fordracingparts.com/parts...KeyField=22347
There's no way the Ti wheels weigh that much.

Tirerack lists the 18" racing wheels at 25.8lbs.
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Old 06-23-2013, 01:29 PM   #6
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Originally Posted by jsr72 View Post
There's no way the Ti wheels weigh that much.

Tirerack lists the 18" racing wheels at 25.8lbs.
It's unlikely that there is 5 lbs of padding in the cardboard box though, so why does Ford Racing list them as being that much heavier than Tirerack when Ford Racing is the actual source of the parts?
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Old 06-23-2013, 06:40 PM   #7
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Wow... didn't mean to start a , but thanks for the prompt info and the links.

The weights quoted on Ford Racing are shipping weights, but can, I guess, be used as a guide. . Including packaging, the Ti wheel is 29.1 pounds, the ST wheel is 30.1 pounds. . So its not a huge difference.

I was thinking back to a Mini Cooper S that I had. I wondered why racers and autocrossers were ditching their Minilite-rep 8 spoke 17" wheels and run-flat tires, and going to factory 5 spoke 16" wheels and tires. Then I measured them...
EACH 16" wheel & tire combo was a whopping 10 pounds less unsprung weight and rotating mass! That made a huge difference in acceleration, braking and handling.
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Old 06-23-2013, 06:55 PM   #8
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I don't remember where I saw it, but I seem to remember a legitimate weight comparison (either just wheel or wheel/tire/tpms, I forget) between the two and they were close enough to not really matter. Either way, they are both OEM and both heavy.

I haven't dismounted the tire's off of my OEM 18's, but my 1.2's are under 20lbs. People underestimate the value of having less unsprung weight, imho. Even though 10lbs is more than I could expect to see without stepping down in wheel diameter, it would make a massive difference in everything-including MPG's. For cost/benefit it is literally the first thing that should be done to any car.
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Old 06-23-2013, 07:24 PM   #9
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Quote:
Originally Posted by 200mph View Post
I was thinking back to a Mini Cooper S that I had. I wondered why racers and autocrossers were ditching their Minilite-rep 8 spoke 17" wheels and run-flat tires, and going to factory 5 spoke 16" wheels and tires. Then I measured them...
EACH 16" wheel & tire combo was a whopping 10 pounds less unsprung weight and rotating mass! That made a huge difference in acceleration, braking and handling.
A good rule of thumb is the equivalent rotating mass is an additional 30-40% for the wheels and 95% for the tires. Runflats are very heavy tires!
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Old 06-24-2013, 10:01 AM   #10
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Quote:
Originally Posted by dyn085 View Post
People underestimate the value of having less unsprung weight, it would make a massive difference in everything-including MPG's. For cost/benefit it is literally the first thing that should be done to any car.
Quote:
Originally Posted by jsr72 View Post
A good rule of thumb is the equivalent rotating mass is an additional 30-40% for the wheels and 95% for the tires. Runflats are very heavy tires!
That's excellent advice... its the reduction of rotating mass on the drive axle that produces gains in acceleration and MPG's, etc, while unsprung weight loss results in crisper, sharper handling.

There's two ways to make your car quicker: (1) improve HP and torque, or, (2) give the engine less work to do. Agreed this is a first priority, and while I love the look of the Focus Ti wheel, I'll be looking for more than a 1 pound per corner improvement.

To finish the MINI story... Car & Driver tested an early MINI Cooper S convertible, and they wrote they couldn't understand why it was the quickest MINi they had tested to date. Simple: the ragtop had the 16" 5-stars, while their previous test cars all had the 17" Minilite-reps.

Thanks!

Mike
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