17 vs. 18 - RX8Club.com

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17 vs. 18

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Old 02-23-2011, 08:56 PM
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WY 17 vs. 18

Searched for members cars with 17in compared to 18in wheels, with out to much luck. i am undecided on what size to get slash style to get? any help with info, advice, comments, pictures, anything would help. oh and i am buying rotas ha ha

Just curious how an inch in dia. changes look of car of if it is even to noticeable?
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Old 02-23-2011, 09:18 PM
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Ill try to be helpful, you probably wont find any direct comparison threads around. But it would probably help to know the style you want first. Then it would be easier to find a picture of that style wheel in both 17 and 18. Ohh and you can defiently notice the difference between 17 and 18, mostly because of the tires.
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Old 02-23-2011, 09:31 PM
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17s
MY CAR


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18s
OTHER MEMBERS CAR

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Last edited by chino0314; 02-23-2011 at 09:40 PM.
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Old 02-23-2011, 09:33 PM
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well i am undecided on the boost, grid, or p45r.
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Old 02-23-2011, 09:41 PM
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alot less tire on an 18inch rim
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Old 02-23-2011, 09:44 PM
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here are p45r 18's

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Originally Posted by 04rx View Post
well i am undecided on the boost, grid, or p45r.
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Old 02-23-2011, 09:50 PM
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For me...18's. It's just the right size for the RX8. If it's smaller or bigger than the 18's, it looks awkward. It's up to you to decide. It's your dough
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Old 02-23-2011, 10:01 PM
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yeah thats what ive been thinking? thanks monchie, chino, and mush
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Old 02-23-2011, 10:15 PM
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Originally Posted by chino0314 View Post
alot less tire on an 18inch rim
Yeah, this is the main difference... It mostly just comes down to personal preference on whether you would rather see more rubber or more metal.
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Old 02-23-2011, 10:57 PM
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Originally Posted by monchie View Post
For me...18's. It's just the right size for the RX8. If it's smaller or bigger than the 18's, it looks awkward. It's up to you to decide. It's your dough
Plenty of examples of bad *** rx8s with 17" and 19".
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Old 02-23-2011, 11:01 PM
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^ Agree. But for me...18's is just right
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Old 02-23-2011, 11:40 PM
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On a lowered car, you can run something like a 255/40 or 245/40 on a 17" rim and get better gearing & lower weight/moment of inertia, both of which add up to better acceleration. You can feel it.

Actually, you can do this on a non-lowered car, but the gaps in the wheel wells will look stoopid. However, if you drop the car a bit (not too much because the tires will lower the car too, and you can quickly get into ground clearance issues) you can balance the look.
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Old 02-26-2011, 11:12 AM
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I ordered my 17'' setup. Once the wheels get made and shipped to me in April, i will post pics.

Wheel specs are 17x9 +28 w/ 245/45/17
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Old 02-26-2011, 09:17 PM
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Dont buy Rotas they look like garbage. There are plenty of good looking quality wheels out there that wont break the bank. Rotas make me cringe.

My wheels. Lowered on Tein Basic.

My car with 17x9.5 +38 (i think) Enkei NT03+M


My car with 18x9 +28 Advan RS


My car with 18x9.5 +45 Enkei RPF1
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Old 02-26-2011, 09:34 PM
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04rx, a lot of racers will go to a 17" wheel because of the reduction of weight. You can loose a couple of pounds of rotational mass which allows the car to accelerate faster. It is also a reduction in unsprung weight that can improve the ride on the street. When you move to a smaller diameter wheel you have to increase the tire diameter to keep the speedometer correct. You will need to work with tire diameter and section width to get something that works with the car.
Beyond that it's all what kind of look your going for.
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Old 02-27-2011, 12:44 AM
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Originally Posted by TrevorsTII View Post
I ordered my 17'' setup. Once the wheels get made and shipped to me in April, i will post pics.

Wheel specs are 17x9 +28 w/ 245/45/17

I have to wait that long?
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Old 02-27-2011, 01:04 AM
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Yup. You wait.
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Old 03-01-2011, 06:32 PM
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just put my buddies 17x10 +25 5zigen fno1rc on my car i dont mind the look of 17s one bit so gunna go for it with the XXR 527 wheels 17x9.75+25 and 255 40 r17 tires
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Old 03-08-2011, 05:58 PM
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ordered 17x9.75 +25 xxr 527
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Old 09-20-2012, 01:09 AM
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Originally Posted by 04rx View Post
ordered 17x9.75 +25 xxr 527
picks?
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Old 09-01-2018, 09:09 AM
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Hi all,
Changed from a size r17 to r18 wheels and shortly afterwards the abs, hand brake and dsc lights all come on after a few minutes of driving.
Any help would be appreciated.

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Reginald.
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Old 09-01-2018, 09:16 AM
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This has nothing to do with the wheels themselves. My bet is that one of the wheel speed sensors got gummed up with schmoo or died.
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Old 09-01-2018, 10:31 AM
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Or the tires aren't the same size or wear and thr computer doesn't understand what you're doing to it.
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Old 09-01-2018, 10:36 AM
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Originally Posted by Loki View Post
Or the tires aren't the same size or wear and thr computer doesn't understand what you're doing to it.
Forgot about that.

Mrqng, what are your tire sizes? Same all around or did you go staggered.
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Old 09-01-2018, 09:00 PM
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Newly refurbished wheels.
Thanks Notapreppie and Loki, as far as i know, it has same tyres all round, but i think one of them has a different speed rating, will double check later in the morning.
I plugged in my abs scanner and it reads a fault with the steering angle sensor, wheels mismatch (all wheels have been refurbished).
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