12-15-2019, 06:03 AM
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#1
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Registered User
Join Date: Jul 2019
Location: Carolinas
Posts: 108
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steering wheel size
Question? been trying to find the dimensions of the four spoke and three spoke steering wheels. Thinking of upgrading to the three spoke but if the size is identical, it may not be worth the investment. Also, been thinking of going completely aftermarket ( pricey), but with a air bag and flat bottom of steering wheel for more leg room. Anyone have any suggestions.
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12-15-2019, 08:17 AM
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#2
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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I'm pretty sure the wheel diameters are the same & I'm positive the 3 spoke is better.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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12-15-2019, 08:34 AM
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#3
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Registered User
Join Date: Oct 2017
Location: Seattle area
Posts: 174
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I replaced my 4 spoke with a 3 spoke a few months ago. They were the same size/diameter, but the 3 spoke adds at least 10 IHP. 
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1998 Boxster
1991 Carrera
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12-15-2019, 08:48 AM
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#4
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Registered User
Join Date: Jan 2019
Location: PA
Posts: 1,531
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Quote:
Originally Posted by SMK Shoe
...and flat bottom of steering wheel for more leg room. Anyone have any suggestions.
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I've seen those flat bottom steering wheels around, but couldn't understand the functional purpose.
If it's for leg room, don't you need just as much leg room when you're turning?
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12-15-2019, 09:34 AM
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#5
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 2,915
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I still have my OG 4-spoke and airbag. Hated. It. IMHO... 4 spoke steering wheels are for sedans, not **************** Porsches.
I purchased and installed the 3-spoke steering wheel... looks much nicer... and looks like it belongs in the car.
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1998 Porsche Boxster
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12-15-2019, 09:46 AM
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#6
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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Quote:
Originally Posted by SMK Shoe
Question? been trying to find the dimensions of the four spoke and three spoke steering wheels. Thinking of upgrading to the three spoke but if the size is identical, it may not be worth the investment. Also, been thinking of going completely aftermarket ( pricey), but with a air bag and flat bottom of steering wheel for more leg room. Anyone have any suggestions.
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Both are 38cm. 
Last edited by particlewave; 12-16-2019 at 09:10 PM.
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12-15-2019, 01:40 PM
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#7
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Registered User
Join Date: Sep 2016
Location: Central Ohio
Posts: 399
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Quote:
Originally Posted by piper6909
I've seen those flat bottom steering wheels around, but couldn't understand the functional purpose.
If it's for leg room, don't you need just as much leg room when you're turning?
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It offers additional clearance space between the wheel and the top of your thighs. Very welcome 'wiggle room' whilst travelling along for long distances with the wheel centered, such as on the freeway.
Once you try it, you will not want to go back to round.
Mine below. Note the blue thread, tied to the color of the car.
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2000 Ocean Blue Boxster S
1980 Ferrari 308 GTSi
2019 Alfa Romeo Giulia Ti Sport AWD
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12-16-2019, 03:53 PM
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#8
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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I’ve got a flat bottomed wheel as well. This particular wheel is smaller overall as well. For me it is 100% a leg thing. Due to a hip issue, I was having a difficult time getting into the car with the stock wheel. The flat bottom makes it much easier. I will admit it is a little odd when doing full rotations, but it’s not a big deal, and I like the way it looks. Plenty of race wheels with flat bottoms...
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12-16-2019, 07:27 PM
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#9
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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I also really like my smaller diameter, flat bottom, thicker rim wheel for the reasons already mentioned. Driving my wife’s S5 (which comes standard with this type of wheel) sold me.
Cocoa with silver stitching to match my 550SE interior.
Sent from my iPad using Tapatalk
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice 
Last edited by Oldcarguy; 12-16-2019 at 07:33 PM.
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12-20-2019, 05:57 AM
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#10
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Registered User
Join Date: Jul 2019
Location: Carolinas
Posts: 108
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Last two pictures are what I'm looking for. Thicker wheel, flat bottom and smaller diameter. I like the three spoke much better. I'm looking for just a little more space than stock at the bottom of the wheel. Just not sure where to start the process of upgrading.
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12-20-2019, 09:02 AM
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#11
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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Quote:
Originally Posted by SMK Shoe
Last two pictures are what I'm looking for. Thicker wheel, flat bottom and smaller diameter. I like the three spoke much better. I'm looking for just a little more space than stock at the bottom of the wheel. Just not sure where to start the process of upgrading.
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I ordered mine from Ivan at DCTMS in California. The wheel is actually manufactured in Taiwan IIRC. You can find their phone number on their website.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice
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Mean Motor Scooter
1998 Porsche Boxster
1991 Porsche Carrera 4
Linear Mode
