Tire Size Recommendation Request

90Eclipseturbo · 11-15-2005, 11:05 PM

Please copy this form and answer the questions when you request tire size recommendations:

TIRE SIZE RECOMMENDATION REQUEST FORM

Please answer the following questions when requesting tire size recommendations.

1. My car is a:
a) 1g DSM
b) 2g DSM

2. My wheel size is:
Diameter: _____
Width: _____
Offset: _____

3. My current or future suspension height will be lowered
a) One inch or less
b) One to 1.5 inches
c) 1.5 - 2 inches
d) More than 2 inches.

4. If suspension is lowered,
a) Rear camber will be adjusted to less than 1° negative.
b) Rear camber will be adjusted to within 1° to 1.5° negative.
c) Rear camber will be more than 1.5° negative.

5. Rear fender flange rolling:
a) My fenders are rolled or will be if necessary.
b) I will not roll the fenders.

6. My driving style is:
a) Street only, with no special performance requirements.
b) Street only, but I like to feel secure on twisty roads.
c) Street and Strip.
d) Street and Autocross.
e) Other

7. I have searched for and read the FAQ's, Tech Articles, and threads on wheel and tire fitment:
a) Yes, but I just need someone with experience to validate my choices.
b) No, I just want someone to tell me what to do.

What is the normal tire size for a 17x7 with 40 offset wheel? And what is the maximum size tire? This is for a fwd 1g, Thanks.

TimG · 11-15-2005, 11:29 PM

The max tire size is just what the tire shop says will fit on the rim. Go and ask that.

You will probably be alright with the maximum width tire when the rim is only 7 inches wide. If you rub a bit, spacers are your friend. Some people do not like the idea of the spacers but I've had no issues with them.

wret · 11-16-2005, 05:55 AM

Quote:

Originally Posted by 90Eclipseturbo

What is the normal tire size for a 17x7 with 40 offset wheel? And what is the maximum size tire? This is for a fwd 1g, Thanks.

Recommended tire widths are from 205 to 225 for that size wheel.

jtmcinder · 06-20-2006, 08:08 AM

Two suggestions. Question #4 should be a bit clearer: (a) under 1*, (b) 1* to 1.5*, and (c) more than 1.5*. Questions #5 should not have the cop-out. Rather, the questions can point to threads that explain the terms.

Otherwise, this would help a lot. Great idea.

- Jtoby

wret · 06-20-2006, 08:35 AM

Changes made. What do you think about the copout option in question 7? I think it will tell us something about the interest/motivation level of the questioner.

FORMONTOYA · 06-20-2006, 08:44 AM

My answer is 7B..."I just want someone to tell me what to do."

But seriously...we need a few more request forms like this....turbo, exhaust, clutch, fuel, etc selection.

wret · 06-20-2006, 08:54 AM

Quote:

Originally Posted by FORMONTOYA

My answer is 7B..."I just want someone to tell me what to do."

But seriously...we need a few more request forms like this....turbo, exhaust, clutch, fuel, etc selection.

Go for it.

I orginially posted something similar kind of as a joke in the Newbie forum, but I think this could save everyone a lot of confusion and frustration.

jtmcinder · 06-20-2006, 09:59 AM

Can't we just replace 7b with 245/40/17 on 17x8 +40 and call it a day?

- Jtoby

AuntiesTSI · 08-21-2006, 08:36 PM

I recently picked up a set of 16x8 RX-7 wheels for my 2g FWD, I'm not sure of the stock offset on these wheels. I've tried to search around for some answers but couldnt find anything specific. The car is currently lowered maybe an inch with GR-2s and Tein springs.

So my question is what size of slicks or drag radials would be best to put on them and if I would need any sort of spacers? I was lookin at ET streets around 245/40/16, but I dont want to go and buy these expensive tires for them not to fit.

Rx3 · 08-21-2006, 11:32 PM

Quote:

Originally Posted by AuntiesTSI

I recently picked up a set of 16x8 RX-7 wheels for my 2g FWD, I'm not sure of the stock offset on these wheels. I've tried to search around for some answers but couldnt find anything specific

That question is answered in the VFAQs

http://www.vfaq.com/mods/macross/2Gfitment.html

Which generation RX-7 wheels did you get?

Quote:

Originally Posted by AuntiesTSI

So my question is what size of slicks or drag radials would be best to put on them and if I would need any sort of spacers? I was lookin at ET streets around 245/40/16, but I dont want to go and buy these expensive tires for them not to fit.

If you can get more data on the tires, like the overal diameter, etc. You can easily use a tire calculator to figure out whether they will fit.

Short answer, yes they can be made to fit. It would be easier, however, if you got a wheel with an offset less than 40mm. 35mm would be good. If you run spacers, I'm not sure how big a spacer you will need, and depending on that, you might need longer wheel studs.

Ny personal opinion, get a wheel with a better offset.

DSMSpyder99 · 08-22-2006, 07:57 AM

i believe FD wheels are 50mm offset. So you would need any where from 10-15mm wheel spacer. Along with longer wheel studs (Roadraceengineering.com).

DsmKid98GST · 09-18-2006, 08:10 AM

I have 18 rims / tires and I've been contimplating on going back to a smaller wheel.

I know that the 18" gives me more street grip but they also weigh about 50lbs each. I was wondering if i went smaller/lighter with the same quality tires would it make a huge difference in traction? Will I spin too much since the tires are now lighter and skinnier?

Rx3 · 09-18-2006, 06:53 PM

Quote:

Originally Posted by DsmKid98GST

I know that the 18" gives me more street grip

I don't know who told you that

Get familiar with the search function, and do a search on "rotational mass" . You will find all the answers to your question. Here are two threads to get you started.

17" or 18" Rims

Traction with bigger rims

Quote:

Originally Posted by DsmKid98GST

Will I spin too much since the tires are now lighter and skinnier?

That has more to do with your ability to modulate the throttle and control the friction point of the clutch than what size wheel and tire you are running. Typically when diagnosing a handling problem, you want to evaluate yourself first and make sure you aren't doing something to cause the problem.

DsmKid98GST · 09-18-2006, 07:29 PM

Thank you for the pointers. I attempted to do a search function but I guess i was using the wrong key words.

Quote:

Originally Posted by Rx3

I don't know who told you that

Just some amateurs I asked before coming to the boards. Suspension and handling is my weak point when it comes to cars.

DGajre777 · 09-18-2006, 07:56 PM

Get 17s or go back to 16s. As for wheelspin, 19s are harder to spin than 16s. A widely used combo is 17" rim with 225/45 series tires.

LONEWOLF01 · 11-08-2006, 09:23 AM

1) 1G
2) 17 INCHES
8 WIDTHS
31 OFFSET
3) C (I own right now Megan racing lowering springs and kyb gray shocks I will be upgrading to the Megan racing coil over kit after I get feedback on performance)
4) B
5) A
6) B (mostly highways with wide turns) (this is not Japan)
7) A & B

Notes: I would like to put 235/40/17 all around but I think it would be too wide for the front
I don't want my wheels to stick out and I don't like my wheels fully tuck in I heard that I can probably offset them but the car is awd. Maybe 215/45/17 for the front. 235/40/17 for the rear. I also own the ingall camber kit for the rear

Here is a link for the rims I bought:

http://www.edgeracing.com/wheel/2453/

http://www.edgeracing.com/images/whe...front_zoom.jpg

eclipsegsx1736 · 11-08-2006, 09:32 AM

Quote:

Originally Posted by LONEWOLF01

1) 1G
2) 17 INCHES
8 WIDTHS
31 OFFSET
3) C (I own right now Megan racing lowering springs and kyb gray shocks I will be upgrading to the Megan racing coil over kit after I get feedback on performance)
4) B
5) A
6) B (mostly highways with wide turns) (this is not Japan)
7) A & B

Notes: I would like to put 235/40/17 all around but I think it would be too wide for the front
I don't want my wheels to stick out and I don't like my wheels fully tuck in I heard that I can probably offset them but the car is awd. Maybe 215/45/17 for the front. 235/40/17 for the rear. I also own the ingall camber kit for the rear

Here is a link for the rims I bought:

http://www.edgeracing.com/wheel/2453/

http://www.edgeracing.com/images/whe...front_zoom.jpg

This should be in a separate thread.

Quote:

(mostly highways with wide turns) (this is not Japan)

....

An offset of +31 for a 17x8 is very low. They will stick out pretty far, you're better off with an offset around +40. Do NOT stagger tire sizes, and for god's sake don't put skinnier tires in the front. With that kind of offset, pretty much no matter what you run will rub if the car's low. While you can run 235/40, it's not the correct diameter and will throw off the speedo. 235/45 is closer to stock.

LONEWOLF01 · 11-08-2006, 10:04 AM

I already own them so what size tire i should put on?

asian312 · 11-08-2006, 01:37 PM

Largest recommended tire on an 8" wide wheel is 245. As eclipsegsx1736 suggested, a 31 offset will bring the wheel out closer to the fender and away from the suspension control arms and may encounter some rubbing issues with a tire that wide. You may need a smaller width tire (215-235) to get it to tuck properly or add fender flares or setup a non tuck suspension.

LONEWOLF01 · 11-08-2006, 02:45 PM

so what size tires i should put on 235/45/17? l know the back is fine i was worry about the front. if you gurus say it will fit with minimial rubbing its fine i just don't ### to put 215 as edgeracing suggested. know any good cheap tire places from where i can buy them at.