Suspension/Wheels/Tires/Brakes

RPF1 Dilema

Thread Tools
 
Search this Thread
 
Old 02-08-23, 11:01 PM
  #1  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
RPF1 Dilema

I have the Shine widebody front fenders, however, RPF1 doesn't seem to carry 9.5 x 30 offsets. Does anyone have the Shine fenders with RPF1s with a width of 9 or higher? If so what is your width/offset and is it pretty flush? BTW, 18 rims pls
Advan has the correct setup, but, are so much more expensive, so I thought RPF1 would be a good compromise if I can find the right setup.
Old 02-09-23, 12:22 AM
  #2  
Rotary Motoring

iTrader: (9)
 
BLUE TII's Avatar
 
Join Date: Mar 2001
Location: CA
Posts: 8,211
Received 763 Likes on 505 Posts
Depends on how much front camber you will be running.

Stock is 0 camber.
Maximum -2.5 to -3.5 degrees is available depending on how low the car is.

Each degree of camber moves the top outside edge of the tire 5.5mm.So, offset for "flushness" will vary up to 19mm depending on camber.

The 18x9.5 +30 with 245/35-18 is a good fitment for stock 0 degrees front camber and the Feed front fenders (or knock-offs).

18x10 +38 with 255/35-18 will fit the same on the outside and have plenty of room on the inside.




On the other end of the camber spectrum, Feed runs 18x11 +30 with 295/30-18 at what looks like max available camber (-2.5 at 25" ride height).




18x12 +30 with 315/30-18 would be the max fitment and might require a little work.
The following users liked this post:
Federighi (02-13-23)
Old 02-09-23, 11:42 PM
  #3  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
I have the Shine widebody front fenders, however, RPF1 doesn't seem to carry 9.5 x 30 offsets. Does anyone have the Shine fenders with RPF1s with a width of 9 or higher? If so what is your width/offset and is it pretty flush? BTW, 18 rims pls
Advan has the correct setup, but, are so much more expensive, so I thought RPF1 would be a good compromise if I can find the right setup.
Get some longer hub bolts and run 8 mm spacers.
The following users liked this post:
Federighi (02-13-23)
Old 02-14-23, 01:13 PM
  #4  
Rotor or no motor

iTrader: (24)
 
R-R-Rx7's Avatar
 
Join Date: Oct 2006
Location: Limassol, CYPRUS
Posts: 3,338
Received 369 Likes on 223 Posts
Assuming that the shine fenders you are referring to are the feed style ones, you can do the 18x9.5 +30

These RPF1s are 17x10 +38 and there was some more room in the front



These are 18x9.5 + 22 and thats really the max i would go on the fronts with the shine fenders


Last edited by R-R-Rx7; 02-14-23 at 01:33 PM.
Old 02-14-23, 01:46 PM
  #5  
Rotary Motoring

iTrader: (9)
 
BLUE TII's Avatar
 
Join Date: Mar 2001
Location: CA
Posts: 8,211
Received 763 Likes on 505 Posts
^^
Is that with stock alignment zero front camber?

That is the same as the 18x11 +45 that I run with stock rolled front fenders and max camber (-2.5 deg @ 25.5" height).




Old 02-14-23, 03:08 PM
  #6  
Rotor or no motor

iTrader: (24)
 
R-R-Rx7's Avatar
 
Join Date: Oct 2006
Location: Limassol, CYPRUS
Posts: 3,338
Received 369 Likes on 223 Posts
i dont recall my exact alignment values but i am around -2.5 degree on the front and 275 tires both on the 17x10 and on the 18x9.5

what size tire are you running with the 18x11 ?
Old 02-14-23, 07:06 PM
  #7  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
Originally Posted by R-R-Rx7
Assuming that the shine fenders you are referring to are the feed style ones, you can do the 18x9.5 +30

These RPF1s are 17x10 +38 and there was some more room in the front


Yes, the feed style as in the picture. Those +38 look like they could use a small spacer, a little tucked tbh. But pretty close considering +38 is my only real choice on the Rpf1.
What I really like is my FD is Pearl White, same hood and headlights, so I can see how that fitment looks on something 99% exactly like mine. 👍 I just have my hood painted and the vents left carbon.

Last edited by Tom Smith; 02-14-23 at 07:12 PM.
Old 02-14-23, 07:43 PM
  #8  
Rotor or no motor

iTrader: (24)
 
R-R-Rx7's Avatar
 
Join Date: Oct 2006
Location: Limassol, CYPRUS
Posts: 3,338
Received 369 Likes on 223 Posts

Heres the other pic as we discussed in pm
The following users liked this post:
Tom Smith (02-14-23)
Old 02-14-23, 10:57 PM
  #9  
Rotary Motoring

iTrader: (9)
 
BLUE TII's Avatar
 
Join Date: Mar 2001
Location: CA
Posts: 8,211
Received 763 Likes on 505 Posts
what size tire are you running with the 18x11 ?

Ive run 305/30-18 tire up front and it tucked/turned w/out rub when I raced.
Old 02-15-23, 05:15 AM
  #10  
Rotor or no motor

iTrader: (24)
 
R-R-Rx7's Avatar
 
Join Date: Oct 2006
Location: Limassol, CYPRUS
Posts: 3,338
Received 369 Likes on 223 Posts
Originally Posted by BLUE TII
Ive run 305/30-18 tire up front and it tucked/turned w/out rub when I raced.
I am limited to a max 285 wide tire in the class that i was racing.
while the fitment is pretty close on our setups you can probably get more clearance with the rolled/pulled fenders as opposed to the fiberglass feed fenders
Old 02-20-23, 08:43 AM
  #11  
Martin S.

iTrader: (2)
 
evo_koa's Avatar
 
Join Date: Jan 2012
Location: Huntsville, Al
Posts: 1,401
Received 79 Likes on 57 Posts
18x10+50 is perfect for 285/30x18 square. That is what i run with zero fender rolling or any modifications. No need to get front fenders and rear flares when you can get plenty of tire under the stock body. well unless you need 315+ in the rear
Old 02-20-23, 02:11 PM
  #12  
Rotary Freak

iTrader: (21)
 
ArmenMAxx's Avatar
 
Join Date: Jul 2005
Location: Los Angeles
Posts: 1,599
Received 47 Likes on 26 Posts
I have shines OEM +20mm front fenders with 18x10+35 285/30/18 -2.7 camber and still could use a spacer up front. Rear is very close fitment wise (stocked rolled).

Last edited by ArmenMAxx; 02-20-23 at 02:14 PM.
Old 03-06-23, 11:42 AM
  #13  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
Originally Posted by ArmenMAxx
I have shines OEM +20mm front fenders with 18x10+35 285/30/18 -2.7 camber and still could use a spacer up front. Rear is very close fitment wise (stocked rolled).
Originally I wanted +29 up front +35 in back. That would eliminate the space up front you have. But they only make the 10's in a +38 and 9.5's in a +15 or +38. Crap choices for the front.
Old 03-30-23, 03:04 PM
  #14  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
So, biting the bullet and figure I'll go 10x18 +38 square on the RPF1, being that that seems to be the closest offset to what I need.
Big question now is, anyone have any insight as to how big of a spacer I'd need up front? I am thinking 10 or 12mm, and a 5mm in rear. Am I way off? Looking for close to 0 camber and working on tire size now.
Any help is appreciated, just ready to get the car on the road before it gets warm. Feels like I've been researching rims forever and getting nowhere due to limited offsets
Old 03-30-23, 06:59 PM
  #15  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
So, biting the bullet and figure I'll go 10x18 +38 square on the RPF1, being that that seems to be the closest offset to what I need.
Big question now is, anyone have any insight as to how big of a spacer I'd need up front? I am thinking 10 or 12mm, and a 5mm in rear. Am I way off? Looking for close to 0 camber and working on tire size now.
Any help is appreciated, just ready to get the car on the road before it gets warm. Feels like I've been researching rims forever and getting nowhere due to limited offsets
Spacers are cheap. Experiment!
Old 03-30-23, 09:27 PM
  #16  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
Cheap spacers are cheap, a good set is still $100+. I'll probably throw washers on until the rim sits right, then measure the washers twice and buy once.
Old 03-30-23, 09:45 PM
  #17  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
Cheap spacers are cheap, a good set is still $100+. I'll probably throw washers on until the rim sits right, then measure the washers twice and buy once.
What? Quality 10 mm spacers are like $10 per axle. The expensive part is installing the extended studs.
I wouldn't personally recommend using those spacer kits that come with studs. It's just an additional potential point of failure, and it adds weight.
Old 04-07-23, 07:10 PM
  #18  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
Appreciate all the input, pulling the trigger on 18x10+38 and spacers.
Next big question is, what is the most comfy tire I can fit that is grippy enough for Mt Driving? Not necessarily the smoothest roads so I need some meat on the wheel for small potholes or occasional rocks, but don't want to rub.
Old 04-08-23, 04:57 AM
  #19  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
Appreciate all the input, pulling the trigger on 18x10+38 and spacers.
Next big question is, what is the most comfy tire I can fit that is grippy enough for Mt Driving? Not necessarily the smoothest roads so I need some meat on the wheel for small potholes or occasional rocks, but don't want to rub.
Cheap, grippy, durable, comfortable/quiet/efficient…pick two. What’s your budget? What size are you going with?
Old 04-08-23, 09:17 AM
  #20  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
I don't need Cheap, but I don't want to break the bank either.
It's the size I am trying to figure out, I want enough sidewall to handle a pothole or two, and be comfortable when cruising, but performance on tight turns one after the other in my mountains. So no rubber bands, but don't want occasional rub either
And yes, grippy, with occasional water, I'm in San Diego, not much rain other than this year.
Old 04-08-23, 03:15 PM
  #21  
Rotary Enthusiast
 
mr2peak's Avatar
 
Join Date: Dec 2016
Location: Bangkok
Posts: 1,016
Received 1,040 Likes on 742 Posts
Tire choices are a rabbit hole. Go look up testing results, or just slap some PS4S on there and try to avoid burn outs and flat spots
Old 04-08-23, 08:15 PM
  #22  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
I don't need Cheap, but I don't want to break the bank either.
It's the size I am trying to figure out, I want enough sidewall to handle a pothole or two, and be comfortable when cruising, but performance on tight turns one after the other in my mountains. So no rubber bands, but don't want occasional rub either
And yes, grippy, with occasional water, I'm in San Diego, not much rain other than this year.
Bro, you're supposed to pick the tire size BEFORE you buy the wheels.

But since you've got 10" wheels, wide fenders, you might as well get 295/30R18s, which are the exact same height as the stock 255/40R17s.

265/35R18s will be only a bit taller, but they will be way lighter and therefore more comfortable (less unsprung mass).

275/35R18s will be quite a bit taller, so your speedo and gear ratios will be off slightly, but more comfortable than 295s because of the extra meat and less weight.

285/30R18s are basically the tires you don't want, since they're smaller, so they have tiny sidewalls.

"Extreme performance" summer tires will be the grippiest, but the loudest, shortest lived, and usually the most expensive.
If comfort and wet grip is an issue, I'd go with something one tier below.
Old 04-08-23, 10:05 PM
  #23  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts
Originally Posted by Valkyrie
Bro, you're supposed to pick the tire size BEFORE you buy the wheels.

But since you've got 10" wheels, wide fenders, you might as well get 295/30R18s, which are the exact same height as the stock 255/40R17s.

265/35R18s will be only a bit taller, but they will be way lighter and therefore more comfortable (less unsprung mass).

275/35R18s will be quite a bit taller, so your speedo and gear ratios will be off slightly, but more comfortable than 295s because of the extra meat and less weight.

285/30R18s are basically the tires you don't want, since they're smaller, so they have tiny sidewalls.

"Extreme performance" summer tires will be the grippiest, but the loudest, shortest lived, and usually the most expensive.
If comfort and wet grip is an issue, I'd go with something one tier below.
I was thinking Firestone Firehawk Indy 500, found some on Fitment Industries. Seem
Good for summer and occasional water, not bad for wear or price. The 265 35r 18's are about $250. Shouldn't be a rub issue at this size right?
Old 04-08-23, 10:09 PM
  #24  
Eats, Sleeps, Dreams Rotary

 
Valkyrie's Avatar
 
Join Date: Oct 2004
Location: Japanabama
Posts: 4,731
Received 88 Likes on 64 Posts
Originally Posted by Tom Smith
I was thinking Firestone Firehawk Indy 500, found some on Fitment Industries. Seem
Good for summer and occasional water, not bad for wear or price. The 265 35r 18's are about $250. Shouldn't be a rub issue at this size right?
I think 265s will just about fit in the stock fenders with a bit of persuasion and some camber?
Old 04-19-23, 12:53 PM
  #25  
93FD
Thread Starter
 
Tom Smith's Avatar
 
Join Date: May 2020
Location: San Diego
Posts: 243
Received 49 Likes on 42 Posts



+38 no spacer, pretty good fit in the rear. Night and day from the plasti dipped stock rims. Just need my coilovers to bring it down a bit.
Now for the front....thanks everyone for all the input.
The following users liked this post:
R-R-Rx7 (04-19-23)


Quick Reply: RPF1 Dilema



All times are GMT -5. The time now is 01:38 PM.