Daystar 2.5/1.5 and 17x9 with 285/70/17 - World of Hurt?

[luke87gt]

Hi guys,

The wife has her eye on a new set of wheels 17x9 0 offset

The 4Runner is getting a Daystar 2.5/1.5 this weekend and the tire size that should work well with the rim is 285/70/17 which is 32.7" tall.

That's a full inches taller than the typical 265/70/17 or 265/65/18 that people run with the Daystar kit.

Am I setting myself up for pain here?

Please advise. Thanks.

 

[Dpassmore]

265/70/17 is a good size for that lift and will still probably rid a little but not bad.



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[RonJR]

The 285/70/17 is only one inch taller than the 265/70/17 (32.7" vs 31.6"). It might rub at full lock - the lift doesn't help you in that regard since it's not enough to get the center of the wheel significantly below the fenders. The extra offset required to accomodate the 285 width will increase the chance of rubbing.

Somewhere on this board there's a post (might be a sticky) as to which tire sizes work with various lifts and levels of trimming.

 

[Cisco Kid]

This may be the post that RonJR was referring to. There is a section that mentions tire sizes with required lift amounts to fit those tires.

http://www.toyota-4runner.org/4th-gen-t4rs/102272-4th-gen-suspension-options-faq.html

 

[truman3]

I have essentially the same amount of lift (2.75"/1.5") and 17x9 with 265/70's and its pretty maxed out with minimal rubbing but I haven't moved liners or added spacers. A small amount of rub going forward with a full left turn, less rub on a full right turn BUT lots of rub in reverse before full right, a little less on the left. If that makes sense.

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[Dpassmore]

A factor to consider is your wheel width and offset. When I ran the DayStar with my 265's and changed wheels they started rubbing. Only change was the wheels. And they were only 8".
However, if it was me, I'd do what I wanted and then make it work from there. Lol


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[tommyg55]

You're gunna want to go ahead and do the BMC before you get the wheels and tires put on. I am running 2.5 spacer lift with 17x9 0' offset wheels on 275/70/17's and I cut chunk out of my tires the first couple days before I chopped my mounts. Just go ahead and buy a $15 grinder and some disks from harbor freight and go to town. That's what I did. also when you get it aligned ask them to give you the most caster they can with the stock LCA's. its not much but it will help if you've got a tech who knows what they're doing.


I should also add I have 1.25" spidertrax all around so this didn't help my cause

 

[luke87gt]

You're gunna want to go ahead and do the BMC...

...I cut chunk out of my tires the first couple days before I chopped my mounts

Pardon my ignorance but what is BMC? And what mounts are you referring to?


You know guys, I didn't realize it yesterday, but there is a 285/65/17 option as well. That tire is 1.2" taller than the stock 30.4" but 1" shorter than the 285/70/17. That might be the ticket and work well with the amount of Daystar lift I will have. Here is a comparison, pictured below:

Stock 17x7.5 30mm Sport wheels with 1.25" spacer and 265/70/17 (what everyone seems to run with Daystar) VS. 17x9 0 offset wheels with 285/65/17:

 

[Blaster61x]

Also curious to know what BMC is? I'm in a similar situation here. I ordered my wheels but have 2.5" lift along with 4 new 17x8 zero offset with a 265/70-17

 

[S p a r k y]

BMC Body Mount Chop Body mount chop - Toyota 120 Platforms Forum

2.5 spacer and aftermarket wheels you will rub really bad with 285/70. You might get away with 285/65

 

[luke87gt]

Did enough research to eliminate the 285/70/17

So now the question is do the 275/70/17 or the 285/65/17. The latter has limited brand options but the 275/70/17 will still be a very tight fit.

Decisions decisions

 

[S p a r k y]

Lots more running the 275/70 over the 285/65! Most all are really happy with 275/70

 

[Dpassmore]

BMC is body mount chop. The body mount behind the front tires. The front tires will rub there in many cases.


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[Dpassmore]

Didn't see sparky' spots. Lol
That link shows how to do it.



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[tommyg55]

Pardon my ignorance but what is BMC? And what mounts are you referring to?


You know guys, I didn't realize it yesterday, but there is a 285/65/17 option as well. That tire is 1.2" taller than the stock 30.4" but 1" shorter than the 285/70/17. That might be the ticket and work well with the amount of Daystar lift I will have. Here is a comparison, pictured below:

Stock 17x7.5 30mm Sport wheels with 1.25" spacer and 265/70/17 (what everyone seems to run with Daystar) VS. 17x9 0 offset wheels with 285/65/17:

Did enough research to eliminate the 285/70/17

So now the question is do the 275/70/17 or the 285/65/17. The latter has limited brand options but the 275/70/17 will still be a very tight fit.

Decisions decisions

Like others have said BMC is body mount chop. If you run 275/70/17s with 17x9 with 0' offset and spacers you will most likely need a BMC. I did. I think there's a lot of ppl who have not had to do it with 275's, I was hoping to be one of those folks but it didn't work out for me lol.

 

[Blaster61x]

Thank you for the BMC clarification. I may switch up to the 275/70 now that I am reading more on them

 

[luke87gt]

Like others have said BMC is body mount chop. If you run 275/70/17s with 17x9 with 0' offset and spacers you will most likely need a BMC. I did. I think there's a lot of ppl who have not had to do it with 275's, I was hoping to be one of those folks but it didn't work out for me lol.

Thanks for the clarification on the BMC. Since I won't be running spacers, hopefully I won't be needing this mod.

I've actually narrowed things down to several wheels that come in 17x8.5 0-offset... Still on the fence about 275/70/17 or just say to hell with it and go 265/70/17 and have less headache...

 

[Nickell80]

Another option apart from chopping the body is new UCA's.

Just get adjustables like Icon, TC, etc and have whoever does the alignment set the caster forward some. UCA's are IMO a good idea anyways because with a lift your alignment is going to be off and the front will wander (mine does with just the daystar 1.5/2.5), and if you lift any higher, you won't have to worry about getting them later.

*Slide in a plug*: I happen to have a brand new set of Icon UCA's and dust caps for sale!

 

[theriddler]

Thanks for the clarification on the BMC. Since I won't be running spacers, hopefully I won't be needing this mod.

I've actually narrowed things down to several wheels that come in 17x8.5 0-offset... Still on the fence about 275/70/17 or just say to hell with it and go 265/70/17 and have less headache...

Old thread but good info here. I'm curious if what route you took on the tires...either 275/70r17 or the 285 size?

I've got the Daystar 2.5/1.5 kit ready to put on soon and I'm torn between tire sizes. A BFG KO2 in 275/70r17 load range C would be perfect, unfortunately i'd have to go with a 265/70r17 or 285/70r17 to keep that tire in load range C. My 4runner suspension is super soft but still handles well with the current 265/65r17 tires so maybe i shouldn't be so afraid of the dreaded load range E tire.

Sweet 4runner by the way, love the white body and black wheels

 

[Keros]

Old thread but good info here. I'm curious if what route you took on the tires...either 275/70r17 or the 285 size?

I've got the Daystar 2.5/1.5 kit ready to put on soon and I'm torn between tire sizes. A BFG KO2 in 275/70r17 load range C would be perfect, unfortunately i'd have to go with a 265/70r17 or 285/70r17 to keep that tire in load range C. My 4runner suspension is super soft but still handles well with the current 265/65r17 tires so maybe i shouldn't be so afraid of the dreaded load range E tire.

Sweet 4runner by the way, love the white body and black wheels

I never saw this thread back in 2016. However, I see that no one has brought up tire/wheel weight vs the OEM suspension.

The stock shock body isn't all that strong. Upgraded suspension should have a BIG consideration around the design of the shock body. The billies available for the 4th gen, for example, have monsterous mounting points.

The stock wheels are around 27lbs and the average 265/65R17 tire weighs around 38-40lbs. Putting OEM tire weight in around 67-70lbs assembled(-ish).

An example 18x9" fuel wheel is 38lbs, and the BFG K02 tires in size LT285/65R18/E 125/122R are 57lbs, putting the assembled weight around +88lbs.

Anyway, the OEM shock body wasn't designed to handle a ~25% increase in unsprung weight. Hitting a pothole or any large obstruction could bend the lower mount on the front shock.

While I don't mean to assume anyone's puttin' huge & heavy wheels and tires on but it's something everyone needs to consider in the grand scheme of the discussion of tire fitment when using a spacer lift on the OEM suspension.

I detest to think that I'd read a thread where someone's wrecked their truck 'cuz of a shock failure; that could have been avoided by having been reminded about unsprung weight as a consideration to choosing wheels & suspension.