The lightest 17" rims available for 986? - Page 2 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Splitpin · 02-22-2012, 11:53 AM

My 1.3 18x8.5 are 11kgs and the 18x10 are 11.75kgs, they are strong too, I run them on all my track cars.

Pat · 02-22-2012, 11:57 AM

Those numbers are way different than what Avalon Motorsports quoted me for the 1.3s.

Splitpin · 02-22-2012, 08:22 PM

Have a look on team dynamics web site, or Rimstock as they are over here

BTEMY · 02-23-2012, 10:58 AM

11kg = 24.25lbs

So far its O.Z. Alleggerita with 17.4 for the front and 20.4 for the back in 18"

I was really hoping to find 17" to save even more on weight.

Pat · 02-23-2012, 11:33 AM

Splitpin- Can you please post a photo showing the offset of your wheels, as well as the offset number? I'll soon be ordering F14s with custom offsets and I'm trying to figure out exactly what I want them to be.
BTEMY- I believe a set of Forgestar F14s are lighter than a set of Alleggeritas.

BTEMY · 02-23-2012, 12:50 PM

Quote:

Originally Posted by Pat

Splitpin- Can you please post a photo showing the offset of your wheels, as well as the offset number? I'll soon be ordering F14s with custom offsets and I'm trying to figure out exactly what I want them to be.
BTEMY- I believe a set of Forgestar F14s are lighter than a set of Alleggeritas.

How much per wheel?

Anybody used them yet?

Pat · 02-23-2012, 01:01 PM

Plenty of people have used them to good effect. Look on Planet 9 and Sixspeedonline.
Forgestar F14 Wheels for Porsche 18"

maj75 · 02-23-2012, 02:01 PM

I think you can get a set of custom CCW wheels in boxster fitment in that weight range in 17". Their 18x12 size weighs 21 lbs so I'm sure the 17x9/10 sizes will weigh much less. Around $2500 for a set.

brp987 · 02-23-2012, 06:19 PM

If my digital bathroom scale is accurate and Tirerack is right in saying a Mich PS2 18x9 is 25lb, then a Fikse profil 5 18x9 is 17lb. The same scale says my stock twist wheels are in the low 20s although I was told they would be 30+.

Splitpin · 02-23-2012, 08:46 PM

Quote:

Originally Posted by Pat

Splitpin- Can you please post a photo showing the offset of your wheels, as well as the offset number? I'll soon be ordering F14s with custom offsets and I'm trying to figure out exactly what I want them to be.
BTEMY- I believe a set of Forgestar F14s are lighter than a set of Alleggeritas.

18x8.5 front et52
18x10 rear et45

225/40/18 Fronts

265/35/18 Rears
But be aware rim width is measured to the inner edge of the rim where the tyre mounts, so different makes can have thicker rim walls and foul.

My rears sit 4mm from the struts and the fronts have loads of room.

LAP1DOUG · 02-24-2012, 02:05 AM

About a year ago, GRM magazine did a test to confirm that a light weight wheel and tire improved times on an auto-x course. They used a Miata for the test, and found that the heavier weight wheel was actually faster!

After examining the data, it was apparent that the heavier wheel was faster just because that wheel/tire combination was just a bit smaller diameter, and thereby lowered the effective gearing and improved acceleration. Just a fraction of an inch less diameter completely over-rode the weight effects of a heavy wheel.

So, you should probably look at the whole package of resulting wheel / tire diameter, sidewall stiffness, etc. rather than being overly concerned about the last ounce of wheel weight.

SpyderRS · 02-24-2012, 02:37 AM

Hi,

our monobloc cast wheels weights in 8,5 x 19 offset45 21,5lbs and in 10,0 x 19 offset 40 23,8lbs, Made in Germany, german TÜV-Approved and a set here in germany costs about 1.200,-Euro in different finishes (matte titanium, matte black/front polish and matte black/red ring)... i´m very interesting for, if you become in USA similar (design, wheel weights ) wheels?

Topless · 02-24-2012, 07:27 AM

Quote:

Originally Posted by LAP1DOUG

About a year ago, GRM magazine did a test to confirm that a light weight wheel and tire improved times on an auto-x course. They used a Miata for the test, and found that the heavier weight wheel was actually faster!

After examining the data, it was apparent that the heavier wheel was faster just because that wheel/tire combination was just a bit smaller diameter, and thereby lowered the effective gearing and improved acceleration. Just a fraction of an inch less diameter completely over-rode the weight effects of a heavy wheel.

So, you should probably look at the whole package of resulting wheel / tire diameter, sidewall stiffness, etc. rather than being overly concerned about the last ounce of wheel weight.

I agree with your conclusions Doug. What a goofy test though. If you want to test the advantages of lighter wheels you must start with identical wheel and tire sizes and diameters.

Bottom line: You can find quality 17" Porsche takeoff 17 x 8.5 wheels that weigh 21 lbs for around $125ea on CL or you can buy ultra lightweight (18lb) racing wheels for $2500 ea. Shaving 12lbs of unsprung weight might buy you 2/10sec per lap. Are there more efficient ways to spend your $10k that will yield higher performance? Adding a 3.8L motor (2-3sec)? Professional coaching by Andy Lally (8sec)? Tires (5sec)? Suspension (2sec)? The low hanging fruit is always the driver, not the wheels.

Mrmaddbrad · 02-25-2012, 06:34 AM

Quote:

Originally Posted by Topless

I agree with your conclusions Doug. What a goofy test though. If you want to test the advantages of lighter wheels you must start with identical wheel and tire sizes and diameters.

Bottom line: You can find quality 17" Porsche takeoff 17 x 8.5 wheels that weigh 21 lbs for around $125ea on CL or you can buy ultra lightweight (18lb) racing wheels for $2500 ea. Shaving 12lbs of unsprung weight might buy you 2/10sec per lap. Are there more efficient ways to spend your $10k that will yield higher performance? Adding a 3.8L motor (2-3sec)? Professional coaching by Andy Lally (8sec)? Tires (5sec)? Suspension (2sec)? The low hanging fruit is always the driver, not the wheels.

People always overlook their driving skills.... Like instead of thinking that each lap wasn't fast enough so they make their car faster, they should just keep driving and going to driving schools...

And as previously stated, the difference between a 18 and 14lb wheel is not that noticable... If you're trying to be faster, when it comes to wheels, go smaller....

Driver before car... Driver. IMPROVE YOUR DRIVING! GO FORTH!!!