Matt Lane

I posted a while back re. ideal offsets and got lot's of great input.

I have checked into the tires I will likely run, and pending final review, I am leaning towards:

REAR - assuming I run either 265 or 285's, 10ET65 rim will fit both well. Based on the tire specs, 10.5 would be at the outer edge of spec anyway.

Any final input on this choice? It's a stock size and offset, so I guess a safe decision re. fitment.

FRONT - assuming I run either 225 or 235's, the 8.5ET56 will accomodate both, giving the flexibility to run the 235 that would otherwise be pinched on an 8.

Any last minute thoughts on going with the 8.5ET56?

Thanks guys for bearing with me. These are a lot of dough and I want to make the "right" choice that will provide reasonable tire selection without worrying about fitment issues.

Thanks for the help.

Best,

Matt

Bill Verburg

I agree that 8.5 ET56 is a good fit, I've seen 245/35 fronts on extremely low cars w/ them.

10ET65 is a safe rear fit, i've seen 285/30 on them again on very low cars. There's more room inboard than out w/ these. I'd be tempted to go 10.5 ET67-70 but haven't seen that fitment that I know of.

Matt Lane

Thanks for the reassurance Bill.

BTW, when comparing, is an 8.5ET56 centered vs. an 8ET50 or 52? ie. is the0.5 inch total width increase roughly equally split both inboard and outboard?

Based on your comment about inboard room at the rear, I assume a 285 should fill out the fenders aesthetically quite nicely...

Cheers~!

Bill Verburg

8 vs 8.5 w/ the same o/s has and added .25"(6.35mm) inside and .25"(6.35mm) outside, assuming equal flange thicknesses

8 ET 52 vs 8.5 ET56 has an added 2.35mm outside and 10.35mm inside

the 285/30 on 10 ET65 will fill them so much that I am unwilling to buy the tire untill I actually try it on my car first

cavlino

Hi Matt I haven't been here in a while, nice wheel choice. The size and offsets you have stated work well for Tikka. I asked Dave for that info a while ago and dug it up, here it is:
BBS RS-GT 18x[8.5 Offset 56mm | 10 Offset 65mm ] inch Wheels

In case your wondering what we (Toycar 2) are running they are:
Fisk's FM10 17 Inch wheels 8.0 (43.18mm) and 9.5 (49.53mm)
They offer almost the same performance as the 18's but 17 inch R compound tires are much cheaper then 18 inch. Since Helena and I share the car we go though a bit of tires in a season so it adds up. Post a picture when you have the new wheels and tires on so we can admire them Say "Hello" to Natalie from Helena and I.

Matt Lane

Thanks for clarifying. Clearly, I did not fully understand exactly what the offset is measuring...

So just so I have this straight, choosing a 56 offset accounts for the fact that there is more room inboard than outboard? ie. the wheel will be neglibly further outboard, but a full 1.3cm further inboard.

Thanks again for your patience...

Best,

Matt

Matt Lane

Hi Carm, great to hear from you. Nat says Hi to Helena!

Thanks for the passing along Dave's offsets. Barring any further last minute fooling around and indecision, the order will be going in next week. The moment of truth will be a final call on gold vs. silver centers... The accountant in me says "Silver", but you only live once!

Best,

Matt

ReinerFink

Just curious why you aren't going with 9" fronts and 11" rears?

-reiner

Matt Lane

Oh oh... here we go again...



Kidding. Based on tons of knowledgeable input and searching the archives, 8.5 and 10 seem like the best fitments for the tires I plan to run on my NB.

As an example, a 285 rear is not even designed to fit on an 11. An 8.5 front is just about perfect for a 235.

Do you disagree?

M

ReinerFink

Sounds good -- I forgt these are street tires, and not track. I think the widest hoosiers you can put on a NB w/ 11" rears is a 295. This is my plan for my fikses, but I can understand how this is overkill for the street.

p.s. get the silver centers.

-reiner

Bill Verburg

Yes, here is a visual of some different widths and o/s

993front, Ive successfully used 8.0 ET50, 8.0 ET52, 9.0 ET52 abd seen 8.5 ET56


993 rear, I've successfully used 10 ET 65, 10 ET56 was ok @RoW M030 height but no when lowered to below RS height

Bill Verburg

You've used these? It would be nice to share ride height, ET etc.

ReinerFink

Here is what I know:

I purchased the set of fikse's that were 9"s and 11"s for a NB car. They are in my garage and I have gazed upon them once as I am currently almost walking w/out crutches after ACL replacment surgery on my right knee.

They look like FM10's and I was hoping to get the SN's off them and get info about the offsets etc before fikse is totally out of business

I asked Greg Fordhal a long time ago if you could run 305's in the rear of a NB 993 and I remember him saying "No, 295 is the most you can get away with." I am guessing that this was on 11" rears.

My current suspension is H&R sport springs with HD's. I have a friend with a good fender rolling tool that he used on his 993 (a WB car) and I was going to play around with fitments when I am able to lift a wheel, which according to my doctor should be sometime in march

-reiner

Bill Verburg

When you say 9" & 11", ar you referring to the bead width or overall width which is usually ~1" more than the bead width?

To measure a wheel lay it flat on the ground, place a flat bar(2x4 wood as long as the face is straight) across the upper plane of the wheel. Measure from the bar to the mounting face then measure from the bar to the floor. With those 2 measurements, as long as they are carefully and acurately done, you can determine both the bead width and ET of the wheel.

jdistefa

Matt,

8.5f/10r is perfect. As Bill said, depending on the tire (and amount of negative camber), you may have to play a bit re. fitting a 285 width - consider having your fenders rolled. Can't wait to see them, beautiful wheels!

Aren't you going to go with gold???