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18x9.5 drag radial fitment question

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Old 10-24-2010, 01:47 PM
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Default 18x9.5 drag radial fitment question

Just wondering if a 305 mt drag radial will fit.

Link to the two I'm looking at.
http://www.summitracing.com/parts/MTT-3786R/?rtype=10

http://www.summitracing.com/parts/MTT-3785R/
What kind of sidewall difference am i looking at? I am lowered with bmr springs. If anybody has pics of what I am wondering that would be awesome.
Kind of hard to search because I am on my phone. thanks
Old 10-24-2010, 02:04 PM
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So i would be ok going with a 305/45 but not 305/35..
http://www.mickeythompsontires.com/s...StreetRadialII

Anybody want to explain why?
Is the 305/45 going to look good on there? Meaning proportional on the side not 8 inches of sidewall and not bulge big time over the rim.
Old 10-24-2010, 08:11 PM
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You need atleast a 10.5 inch rim for a 305. You will have bulging mounting on a 9.5.
Old 10-24-2010, 08:18 PM
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9" - 265, 275, 285
10" - 285, 295, 305
11" - 305, 315, 325

. . . . more or less. If an extra 0.5" of an inch is added, go with the figure to the right.
Old 10-24-2010, 08:21 PM
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Front
9.5" ..... +38 to +56 mm .... 255, 265, 275, 285
10.0" ... +38 to +48 mm .... 265, 275, 285


Rear
10.0" ... +38 to +54 mm .... 275, 285, 295
10.5" ... +38 to +50 mm .... 285, 295, 305, 315
11.0" ... +45 to +56 mm .... 305, 315, 335
Old 10-24-2010, 08:28 PM
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Those figures are a lil' more extreme whereas my figures are a bit more conservative. For example, I wouldn't recommend a 255 tire on a 9.5" rim. It'll work but will appear stretched and "importish".
Old 10-24-2010, 10:43 PM
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275 x 35 fit well on my 18 x 9.5 fronts.

305's fit on 10.5 in the rear with a little bfh
Old 10-24-2010, 10:53 PM
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Why does mt.com say that the 305/45 is approved for a 9.5 rim then?

I have 275 on there now and they fit perfect, I know 305 would be the largest possible but I don't see it being an issue.
Old 10-25-2010, 01:39 AM
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Originally Posted by lemons12
Just wondering if a 305 mt drag radial will fit.
Originally Posted by lemons12
Why does mt.com say that the 305/45 is approved for a 9.5 rim then?
Your thread seems a bit redundant as you seem to have found the answer you are looking for.

If you want a proper fitting tire, a 285 would be ideal for a 9.5" rim. Any larger and there will be some buldging.
Old 10-25-2010, 05:23 AM
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Originally Posted by lemons12
Why does mt.com say that the 305/45 is approved for a 9.5 rim then?

because there is extra sidewall to safely pull into the rim and buldge out without comprimising the integrity of the sidewall. Im running my 295/45s on a 9" rim with *some* buldge, its not bad, just looks a little aggressive. it would be pushing it on a 295/40 tho.


Im going to an 18x10.5 from a 17x9 and going to a 305/45/18 but that is for tire height. I would run wider if they made it
Old 10-25-2010, 06:13 AM
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Actually the funny thing is, that if you look at M/T's site, the 305/35/18 is actually .5" wider that the 315/30/18, which i believe also has alot to do with the sidewall and bulging. I have 18x10.5" on all 4 corners, and went with the 305/35/18 rears, and 285/35/18 Hankook v12's on the fronts, and have no rubbing issues anywhere. The shop did put 5/16" spacers on the front just in case, but i am gonna throw the car in the air when i store it, and remove the spacers to check clearance without them, but 5/16" is totally safe with fatory length studs anyways. Just want to tuck the fronts in more, and would like the rears to stick out a bit more.

To the OP, go with the 305/35's if that is what they say to use, but just make sure to run them around 25-28 psi, no higher on the street, or they will wear very badly and be blown out pretty fast...heard of a few forum members that had that problem.
Old 10-25-2010, 11:25 AM
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Originally Posted by 02TransAm/Batmobile
Your thread seems a bit redundant as you seem to have found the answer you are looking for.

If you want a proper fitting tire, a 285 would be ideal for a 9.5" rim. Any larger and there will be some buldging.
All of you were saying the 305 was too wide. I wasn't going to take some charts word for it. i wanted to know why not just, it wont fit cause it won't fit. You learn nothing that way.
I needed to know if a 305 would safely fit on a 305 rim.. the easiest and best answer i could of got was..... a 275 would be ideal for your size rim but a 305 will safety fit on and is the largest you can run although there will be a small amount of bulging.
Instead there is a few people who act like i am inferior like every thread in the wheel section similar to this. This is the only forum section I hate posting questions in. I thought before it was because it was the subject I was the most ignorant about but it is not.. it is how you recieve answers.
Originally Posted by SS4Luck
because there is extra sidewall to safely pull into the rim and buldge out without comprimising the integrity of the sidewall. Im running my 295/45s on a 9" rim with *some* buldge, its not bad, just looks a little aggressive. it would be pushing it on a 295/40 tho.
Im going to an 18x10.5 from a 17x9 and going to a 305/45/18 but that is for tire height. I would run wider if they made it
Awesome reply. That answers my question to why one 305 fits and not the other that was ignored earlier.
Could you possibly get me a few pics of your rear tires just showing the bulge. Thanks a ton for it.
Old 10-26-2010, 03:33 AM
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Originally Posted by lemons12
Awesome reply. That answers my question to why one 305 fits and not the other that was ignored earlier.
Could you possibly get me a few pics of your rear tires just showing the bulge. Thanks a ton for it.
Okay here are a **** ton of pictures. 295/45/17 mickey thompsons. MT says minimum rim width should be 9.5, but these are 9" so f you got some extra sidewall the .5" doesnt make **** difference. When i get t the track i let these down to 16psi and dont have any problem with them what so ever

Compared to stock sized 275/40 nittos


attatched are the best pictures i have of them, i get the car back tomorrow and i will take onces just of the buldge.
Attached Thumbnails 18x9.5  drag radial fitment question-photo.jpg   18x9.5  drag radial fitment question-photo1.jpg   18x9.5  drag radial fitment question-photo2.jpg  
Old 10-26-2010, 07:45 AM
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Is that 305/45 going to fit ok since it is so tall? It is a 29 inch tire.. what all am i going to have to do? Going on my trans am.. I have lcas and lowered on bmrs.. I don't mind doing alittle work but I'm going to minitub it to run these.

I am scared it is going to be too much sidewall and look goofy. These are going on my "pretty" rims and not prostars but I do want an aggressive look and stance to it.


Thank uou to all who.helped explain why it would or woildnt fit my rim and how it was going to look up until this point.
This section needs more detailed explanations like a few i have got.. rim and tire choice are two huge aspects in making a car look good if not the main two. I want to make sure as much as possible that I will like hem before I blow 500$ on tires only to have them mounted then have to take back off and try to get my money back.
Old 10-27-2010, 08:28 AM
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285 is the biggest you can fit on a 9.5" wheel.
Old 10-27-2010, 08:40 AM
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Originally Posted by joblo1978
285 is the biggest you can fit on a 9.5" wheel.
Unless I am totally missing it....

Obviously you can depending on the tire height. Mt site has it listed as acceptable.. why would they list that if it wasn't safe? I underatand there will be some bulge and that is acceptable to a point.
Old 10-27-2010, 08:42 AM
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Originally Posted by lemons12
Is that 305/45 going to fit ok since it is so tall? It is a 29 inch tire.. what all am i going to have to do? Going on my trans am.. I have lcas and lowered on bmrs.. I don't mind doing alittle work but I'm not going to minitub it to run these.

I am scared it is going to be too much sidewall and look goofy. These are going on my "pretty" rims and not prostars but I do want an aggressive look and stance to it.
Bump
Old 10-27-2010, 01:51 PM
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I am sorry I came off as rude to you, that was not my intention. Most of the time, people in this section ask, "Does XXX fit on a X" size rim?" with an expected response of "Yes" or "No" You, however, would like to know why it would or would not - something I didn't get from the your original post. I percieved your question as a "Yes" or "No" answer.
Old 10-27-2010, 08:08 PM
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Originally Posted by 02TransAm/Batmobile
I am sorry I came off as rude to you, that was not my intention. Most of the time, people in this section ask, "Does XXX fit on a X" size rim?" with an expected response of "Yes" or "No" You, however, would like to know why it would or would not - something I didn't get from the your original post. I percieved your question as a "Yes" or "No" answer.
It is fine.. and yes sir, always looking to learn and further my knowledge. i see where uou are coming from thouh with most just wanting a yes or no.

I still dont understand why the chart says yes and why some on here say no.
I do undrstand it will bulge but I understand it should also still be safe. will all 305s fit? No because of the sidewall height. More sidewall allows a wider tire not bulging as much and being more safe.

Correct?


On my phone so excuse typo and punctuation
Old 10-27-2010, 08:17 PM
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Originally Posted by lemons12
Unless I am totally missing it....

Obviously you can depending on the tire height. Mt site has it listed as acceptable.. why would they list that if it wasn't safe? I underatand there will be some bulge and that is acceptable to a point.
Well if you know how to research tires and their specifications why are you asking if X tire will fit? It now appears that if you're asking whether a tire will physically or safely fit. I'm not going to tell you to throw on a tire that is a size outside of what the manufacturer recommends for a given wheel width.

It's not a matter of tire "bulge" and how it looks on the rim and whether it looks like it will fit or not but what the manufacturer sais will safely work or not work. It's simple, if you want wider tires, buy wider rims and don't shoehorn on something that won't fit or isn't designed to fit. Sorry.


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