The Daytona Wheel and Tire Repository

[Logan]

I have compiled some wheel and tire data specific to the FFR Gen3 Type 65 Coupe/Daytona. Now sharing it here for the greater FFR community.

1. If you are not on this list, but have data you'd like to add, please PM me or post here.
2. If you see any errors, please let me know.
3. Conditionally formatted columns are colored by low-high values. DO NOT interpret them as green = good, red = bad. That is not how they work.
4. Clearance/rubbing is dependent on alignment, body fitment, specific tire model, etc. Many of these are driving cars, so expect minimal/no rubbing issues, but some are still under construction (see notes column).
5. Offset total = wheel offset plus any spacer thickness, if present.
6. Backspace and Frontspace are both calculated with spacer included, if present. They also include the wheel flanges (0.5" nominal per flange, so an 18x10" wheel is actually 11" wide including flanges).

[slarson]

Great resource! Thank you.
I've been gathering some of this type of data as I plan my build. My Coupe delivery date is early July.

[cgundermann]

Awesome idea Logan! I started collecting for my build...

Thanks, Chris

[Skuzzy]

Now I wish I could pair a 3/4 view of each of those cars to see how the tires sit in the wheel wells.

Nice work Logan. I'll get you the information on mine when I get there.

[q4stix]

You could also add to my line "He's crazy. Disregard everything" haha

[lewma]

Great resource Logan!!!

[cgundermann]

You could also add to my line "He's crazy. Disregard everything" haha

Now that's funny!

Chris

[ProJoe]

YES! I could have used this SO MUCH a year ago. AWESOME!

[freds]

Another line. Thanks for doing this.

freds: Nitto 550:AVI1: :18:8:35: :35: : :245/40/R18:295/40/R18:18:10.5:22: :22: : :No rubbing

[Logan]

Glad you guys find it useful.

@ freds - I added your info and updated the OP.

[freds]

Glad you guys find it useful.

@ freds - I added your info and updated the OP.

Thanks..again

[freds]

Another line. Thanks for doing this.

freds: Nitto 550:AVI1: :18:8:35: :35: : :245/40/R18:295/40/R18:18:10.5:22: :22: : :No rubbing

Sorry, the data entered into the spread sheet is not correct. I use space between the colons as a sort of shorthand, assuming an EXCEL spread sheet. I apologize!!!!
Here it is in detail
Tires: Nitto 550
Wheel Brand: AVI1
Wheel Model: AVI1
F Diameter: 18
F Width: 8
Offset: 35
Spacer: 0
Offset total: 35
Backspace: 5.9
Front Space: 3.1
Front Tire: 245/40/R18
Rear Tire: 295/40/R18
Rim Diameter R: 18
Rim Width R: 10.5
Offset R 22
Spacer R: 0
R Offset Total: 22
R Backspace: 6.6
R Frontspace: 4.9

[freds]

Sorry, the data entered into the spread sheet is not correct. I use space between the colons as a sort of shorthand, assuming an EXCEL spread sheet. I apologize!!!!
Here it is in detail
Tires: Nitto 550
Wheel Brand: AVI1
Wheel Model: AVI1
F Diameter: 18
F Width: 8
Offset: 35
Spacer: 0
Offset total: 35
Backspace: 5.9
Front Space: 3.1
Front Tire: 245/40/R18
Rear Tire: 295/40/R18
Rim Diameter R: 18
Rim Width R: 10.5
Offset R 22
Spacer R: 0
R Offset Total: 22
R Backspace: 6.6
R Frontspace: 4.9

Solved via PM

[drewr]

No love for 15" wheels...

[Logan]

No love for 15" wheels...

The lack of 15" wheels on Daytona Coupes is mainly driven by the lack of tire options, but also the modern brakes that builders are using will often not fit under a 15" wheel. The performance, ride quality, looks, and both wheel AND tire selection is so much better in 17", 18", or 19".... the results speak for themselves. For transparency, I have included the specs for ALL builders who have shared this data, either by posting here on the forum, on Facebook, or communicating directly with me. This chart is not limited it to 17" or above, for example.

Personally, I like the look of 15" wheels on the Roadster more than I like 15" wheels on the Coupe, though I can't explain why. The overwhelmingly popular 18" wheel size simply looks great on the Coupe, in almost any design (IMO).

Top post updated!

[jdm65]

Hey Logan!!

I've told you already, but great work!!

I can finally add my specs and comments to this, I know I already sent you them but I'll post them here for all to see haha.

Wheels: Volk TE37V Mark II
Front Size: 18x11 -7
Rear Size: 18x11 -30
Spacers: None (front+rear)
Tire: still haven't decided, but likely 265/35R18 rear and 255/40R18 front

The fitment is really good!

[Skuzzy]

I must be missing something. 265/35R18 tires normally use a 9.5" wide rim, 10" tops.

[ProJoe]

I must be missing something. 265/35R18 tires normally use a 9.5" wide rim, 10" tops.

I mean I guess you're missing something, but people in the FFR/traditional muscle car or classic car world have just never been exposed to it.

In the import car world people run a thinner tire for aesthetic reasons, and on older japanese cars also for clearance reasons. He is building his coupe in what I could call a stylized JDM (japanese domestic market) fashion. so huge wheels with a tire that stretches a little bit and a car so low to the ground it's almost obscene.

I love it.

here is a picture from his build

[Skuzzy]

Ahhh. Thank you for the explanation.

[Kennyk]

Logan,

It seems not too many running a 3 link in their Gen 3 so here’s my set-up for your chart.

ToyoR888R
MST
Suzuka
18
9.5
+12 offset
265/35ZR18
315/30ZR18
18
11
+10 offset
25.4 spacers

No rubbing

Thx, Nice job on the data compilation!

[GT_Rich]

Logan,

It seems not too many running a 3 link in their Gen 3 so here’s my set-up for your chart.

ToyoR888R
MST
Suzuka
18
9.5
+12 offset
265/35ZR18
315/30ZR18
18
11
+10 offset
25.4 spacers

No rubbing

Thx, Nice job on the data compilation!

Can we get a rear axle width from you for this data? Fox width? 94-98 width? 99-04?

[Logan]

Updated top post today. A few more people are now on the list, and a few existing setups have had minor corrections. I also have 8 more known builders (not shown) who have not shared their specs, so I am unable to include them in this list.

@KennyK - You're added, and I made a note that your car is SRA. I may consider adding a column for rear axle type in the future, but the vast majority of Gen3 Coupes are IRS.

[Kennyk]

Moser from Mike Forte. Car is in paint, can confirm width on my next visit.

[Rsnake]

Hello Logan, great job on the wheel and tire data.
After messing with my 335 rears I can confirm that I had 18x12 with 6.75" BS.
They rubbed the angled bar which I sliced down about 1/2"
They still rubbed under hard corners so I have added 1/2" spacer making the back spacing 6.25"
I have attached a photo as the tire placement is perfect image.jpegimage.jpeg

[lewma]

Logan, thanks again for taking the time to compile this information. One day I'll pull the trigger and get my wheels/tires ordered.

mark

[lewma]

All

While shopping for wheels, I'm noticing a "Center Bore" measurement too. Any idea what measurement I should be looking for ? Seems like 70.5mm crops up a lot

thanks!
mark

[Logan]

Mark, you are correct. The center bore size is 70.5mm. Obviously a wheel with a bore smaller than that will not fit over the hub, but if a wheel has a larger bore, you can use hub rings to take up the difference.

For example, my (actually all) custom Forgestar F14 wheels have a center bore of 72.56mm, and they provide plastic rings that press into the wheel which reduces the bore to the desired 70.5mm. They are not necessary due to the tapered lug nut seats providing the centering constraint between wheel and hub, but they're a "nice to have" added feature to make the wheels both lug centric AND hub centric. I have also purchased some identical rings from Amazon for under $20 which are made of aluminum to handle the extra brake heat when racing.

What wheels are you currently looking at? Send me a PM if you prefer, happy to discuss details.

[lewma]

Logan

I'm looking to replace the studs that came with the kit and use longer studs along with hub spacers on the rears. You mentioned that you were using longer studs. Do you have a part number that you could share ?

thanks
mark

[Logan]

Logan

I'm looking to replace the studs that came with the kit and use longer studs along with hub spacers on the rears. You mentioned that you were using longer studs. Do you have a part number that you could share ?

thanks
mark

Mark, I used ARP 100-7733 studs at all four corners on my Daytona. These are M14x1.5 studs, which is not what FFR suggests. They tell you to remove the M14 studs from the S550 rear hubs, and press 1/2"-20 studs in, to match the SN95 front hubs. I prefer to do it the other way around, pressing the smaller studs out of the front and going up to M14x1.5 to match the rear. The ARP studs are popular S550 Mustang aftermarket items and 1" longer than stock (which means you can use up to a 1" slip-on spacer without sacrificing any thread engagement whatsoever). More details in my build thread, linked in my sig below. Let me know if you need any more detail, I'd be happy to walk you through it. Although I think it is discussed at length in my thread. Hope this helps.

[lewma]

Logan, here's what I'm thinking now:

Fronts:
Forgestar CF10 19x10 Deep Concave with a +11mm offset 285/30R19

Rears:
Forgestar CF10 19x12 Deep Concave with a -26mm offset 325/30R19

If my math is correct, the -26mm offset will push the rears out 26mm and remove the need for that spacer that everyone seems to use. Inner clearance should be the same as the 11inch halibrands with a 25.4mm spacer installed.

Not even sure Forgestar offer those specs but do those numbers look correct to you ?

thanks again for doing this spreadsheet!
mark

[Logan]

Mark - Forgestar offers the CF10 wheel (nice looking wheel) in two face profiles, Semi-Concave (SC) and Deep-Concave (DC). Both the sizes you want are only available in DC profile. The 19x10 is available in +8 to +48 offset, and the 19x12 is available in +34 to +74 offset.

So the 19x10+11 CF10 front wheel can be ordered, no problem. The rear wheel is the hard one for the FFR Coupe. To achieve the -26 offset on a 12", you'd have to spec the lowest offset from Forgestar (+34 is the minimum available in the 19x12" CF10), then use a spacer to make up the difference. It would take a 60mm/2.4" spacer to get from +34 to -26, which is not ideal, but doable if that's the wheel you want to use. Now you're seeing the dilemma with wheel and tire fitment for the rear of the Daytona Coupe, and the reason I spent the time to compile this data. There are very few 1-piece wheels that are available in low enough offset, so most builders end up using spacers.

Personally I went with Forgestar F14s with +6 offset (the minimum available in 18"), but even that still requires me to use a 32mm spacer. It's funny that even buying $2k custom wheels it is still hard to eliminate spacers. FFR needs to fix this by increasing the length of the rear control arms and half shafts so we can use far more common high-offset wheels available today.

BTW, you can get a 19x12 Forgestar F14 in Ultra Deep Concave profile with offsets down to -50mm. There's at least two Daytona Coupe builders who have gone with that wheel and needed no rear spacer, as I'm sure you saw on the spreadsheet above. Of course not everyone likes the look of the F14 wheel. Let me know if I can be of more assistance, happy to help with this stuff.

[Ltngdrvr]

FFR needs to fix this by increasing the length of the rear control arms and half shafts so we can use far more common high-offset wheels available today.

This is what baffles me, even the wheels Factory Five offers don't fit correctly without a spacer.
Now, I understand that the wheels they offer were originally spec'd for the MkIV and MkIII, and the IRS rear is as well, but when they did the Gen 3 redesign on the Type 65, it seems to me they should have made an alternate set of rear axle control arms and half-shafts, or spread out the suspension pickup points on the frame to make it all work together properly.

[lewma]

Logan

I really like those CF10 wheels. I mis-read their specs so it looks like i'll need that spacer. I'm not too thrilled about a spacer but after reading some info on those, it looks like the hub centric spacers are ok to use and are available way thicker than what I need too.

mark

[lewma]

Can anyone recommend a dealer to purchase Forgestar wheels from ?

[Logan]

A short non-comprehensive list of companies you can order Forgestar wheels through:

1. Stranoparts (racer/autocrosser who sells performance parts)
2. GetYourWheels
3. PK Auto Design
4. ModBargains
5. OperationalSpeedSupply
6. RaceReadyMotorsports
7. MW Company (this is Forgestar themselves)

There are many others, but these are some popular options. Call several of them and compare quotes.

[lewma]

thanks Logan!

[Tuftster]

KennyK, were you ever able to verify which width rearend you have? I have a 3 link as well and trying to make sure I order the correct backspacing.

[Rsnake]

Give Gordon a call at Levy Racing, He can order the wheels and knows what you need plus he's on the forum and a sponsor.

[Kennyk]

Yes, Fox body width. Purchased from Forte Performance.

[lewma]

Logan

Finally got the wheels / tires on the car. This is what I went with if you want to add them to your spreadsheet:

Fronts
Forgestar CF10 19x10 satin black +11mm offset. Nitto NT555 G2 275/30 - no spacers yet but that may change when I get the nose mounted

Rears
Forgestar CF10 19x11 satin black +21mm offset. Nitto NT555 G2 305/30 - currently have a 33mm spacer installed

mark