17" x 7.5" Wheels -vs- 17" x 9" Wheels

[ftlee20723]

Advice needed.

The stock rims on my 2010 4Runner TE are 17 x 7.5 with an offset of 4.5". I really like these **** Cepek wheels but, they are 17" x 9" with an offset of 4.5". What are the ramifications of running a wider wheel? Do they stick out farther?

P.S. I am running BFG AT 275-70-17s. I have no rubbing on the stock rims. Would going with wider rims cause rubbing to occur?

 

[7harper]

Advice needed.

The stock rims on my 2010 4Runner TE are 17 x 7.5 with an offset of 4.5". I really like these **** Cepek wheels but, they are 17" x 9" with an offset of 4.5". What are the ramifications of running a wider wheel? Do they stick out farther?

P.S. I am running BFG AT 275-70-17s. I have no rubbing on the stock rims. Would going with wider rims cause rubbing to occur?

Yes, with the same backspacing of 4.5 inches ,they will stick out 1.5 inches from where you are now and they will be past the wheel flares about an inch. My rims are 17x8 with 4.5 inch backspacing. The fit is perfect and the tires are exactly even with the wheel well flares.

Imagine if they were 9 inches wide. They would stick out an extra inch on each side.
<a href="http://s420.photobucket.com/albums/pp282/gharper60/?action=view&current=Picture003.jpg" target="_blank"><img src="http://i420.photobucket.com/albums/pp282/gharper60/Picture003.jpg" border="0" alt="Photobucket"></a>

 

[ftlee20723]

Harper,

So I have to choose something that is 17x8 with 4.5" of backspacing? I shouldn't have any rub issues with a 17x8 wheel and my 275 BFGs should I?

Drag not being able to use the **** Cepek wheels they look sweet. :-(

P.S. Do you have a new side view picture with your new wheels on?

 

[7harper]

Harper,

So I have to choose something that is 17x8 with 4.5" of backspacing? I shouldn't have any rub issues with a 17x8 wheel and my 275 BFGs should I?

P.S. Do you have a new side view picture with your new wheels on?

17x8 with 4.5" backspacing and a hub diameter of at least 106mm is the perfect fit for the 5ths.

Here are some pics. Got the 305/65/17 BFG MT KM2's tires put on yesterday and cleaned her up today.

<a href="http://s420.photobucket.com/albums/pp282/gharper60/?action=view&current=Picture020-2.jpg" target="_blank"><img src="http://i420.photobucket.com/albums/pp282/gharper60/Picture020-2.jpg" border="0" alt="Photobucket"></a>

<a href="http://s420.photobucket.com/albums/pp282/gharper60/?action=view&current=Picture005-1.jpg" target="_blank"><img src="http://i420.photobucket.com/albums/pp282/gharper60/Picture005-1.jpg" border="0" alt="Photobucket"></a>

 

[ftlee20723]

From TireRack.com here are the specs on the **** Cepek rim.

Offset: -12mm
Backspacing: 4.56"
Bolt Pattern: 6-139
Rec. Tire Size:265/70-17

Here are the specs for your rim.

Offset: 00mm
Backspacing: 4.44"
Bolt Pattern: 6-139
Rec. Tire Size: 265/70-17

Here is a link to the available rims for the 2010 4Runner TE at TireRack.

Wheels for 2010 Toyota 4Runner V6 Trail

Do you have to add the offset + the backspacing to figure out how they will stick out?

 

[doodman]

Harper,

So I have to choose something that is 17x8 with 4.5" of backspacing? I shouldn't have any rub issues with a 17x8 wheel and my 275 BFGs should I?

Drag not being able to use the **** Cepek wheels they look sweet. :-(

P.S. Do you have a new side view picture with your new wheels on?

I think what harper is trying to say is that you can have an 8", 9", 10", or even 50" wide rim if you want just so long as the backspacing is 4.5", you shouldn't have a problem with any rubbing. Correct me if I have this wrong please!

 

[ftlee20723]

I think what harper is trying to say is that you can have an 8", 9", 10", or even 50" wide rim

Understood. It is just that it will be sticking beyond the wheel wells if you go to wide. Damn seems like everything I like it a 17"x9" rim.

I wish I knew how the Offset and Backspacing played together.

 

[WhiskeyCop]

Understood. It is just that it will be sticking beyond the wheel wells if you go to wide. Damn seems like everything I like it a 17"x9" rim.

I wish I knew how the Offset and Backspacing played together.

The offset of a wheel is the measurement from the center line of the wheel to the wheels mounting pad measured in millimeters. Backspacing is the measurment from the wheels mounting surface to the back edge of the wheel.

 

[doodman]

Understood. It is just that it will be sticking beyond the wheel wells if you go to wide. Damn seems like everything I like it a 17"x9" rim.

I wish I knew how the Offset and Backspacing played together.

I agree about almost ALL of them that I like being 17x9 instead of the smaller width wheels.

I'll explain this the best I can:

Offset - the amount of space the hub (center of the wheel) is from the midpoint of the wheel's width; example: if a wheel is 10" wide and the hub is 3" from the streetside edge of the wheel, then the offset is considered to be 2" and if you calculate it, it goes like this - the midpoint of the wheel is 10" and the hub is 3" from the streetside edge of the wheel so 5 minus 3 equals 2" and in this case the offset is a positive 2" since the hub is closer to the streetside wheel edge. if it was closer to the vehicle edge of the wheel it would be a negative offset

Backspace - this is the distance from the hub to the vehicle edge of the wheel and you get this value by taking the wheel width, dividing it in half and adding the offset if positive and subtracting the offset if negative.

 

[ftlee20723]

I agree about almost ALL of them that I like being 17x9 instead of the smaller width wheels.

Can you tell me what you are looking at in the 17"x8" that you like?

 

[7harper]

Read this post http://www.toyota-4runner.org/5th-g...re/62253-aftermarket-wheels-3.html#post529676

This is the chart I use. https://www.rsracing.com/tech-wheel.html

Just because Tire rack and all these companies sell rims that fit doesn't mean they fit right or fit without spacers.We don't have that big of choice because most of the 6x5.5 rims made are made with Chevy/GMC/Cadillac in mind. They have the same bolt pattern as us but a 5.25-5.5 backspacing. Sure ,these wheel places say they fit. They don't tell you you need a spacer to make it fit or that it will stick out an inch or 2.

 

[jca21]

Here are some pics. Got the 305/65/17 BFG MT KM2's tires put on yesterday and cleaned her up today.

how does it drive with the 305's? does it do alright with the stock gearing?

 

[7harper]

how does it drive with the 305's? does it do alright with the stock gearing?

The road ride is not that bad for as knobby as they are. Just as quiet as the BFG AT's and you can only feel the knobs when you come to a stop.

The stock gearing is fine. These are actually a little bit smaller then the 285's in height. 32.8" height against a 33" in 285. They are just about an inch wider. You don't have to worry about gearing til you get to 34's or 35's.

These things are unbelievable offroad. Bunch of Jeep guys at work and they love em and are all converting. It's between these KM2's ,the Goodyear MTR and the Toyo Open Country MT.

Here's a sip of the BFG kool aid in videos.
BFG FTW!!!

<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/Tvu5LHqEHNA&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/Tvu5LHqEHNA&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>

<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/q1-rdwCpOo4&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/q1-rdwCpOo4&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>

 

[mikey's2010SR5]

Harper with every change you make the more i like what you have done. And you are still running with just the front spacer, correct? Makes me think of just doing that instead of the full lift.

Bravo...keep the mods going.

 

[4RunnerTrail]

The road ride is not that bad for as knobby as they are. Just as quiet as the BFG AT's and you can only feel the knobs when you come to a stop.

The stock gearing is fine. These are actually a little bit smaller then the 285's in height. 32.8" height against a 33" in 285. They are just about an inch wider. You don't have to worry about gearing til you get to 34's or 35's.

These things are unbelievable offroad. Bunch of Jeep guys at work and they love em and are all converting. It's between these KM2's ,the Goodyear MTR and the Toyo Open Country MT.

Harper would the 285/70-17 on these rims rub? Do the spacers help with the size you have not rubbing?

 

[Egstyle]

I just checked the KM2 sizing chart. It says you should have 8.5 to 11" rims for 305's. Is it ok to go narrower? I noticed you have 8" rims, harper.

 

[7harper]

I just checked the KM2 sizing chart. It says you should have 8.5 to 11" rims for 305's. Is it ok to go narrower? I noticed you have 8" rims, harper.

Ya I know that. That was a very big decision for me as I was torn between getting the 285/70/17 that fits rims 8-10.5 and the 305/65/17 that fit 8.5-11 . I went as far as to call BFG tech and they all said going down 1/2 inch size is not that big of deal on THESE tires as long as I'm not doing any high speed desert racing over 120mph where you get high side load pressures. They said these tires are practically indestructable.You know how good they are,your running them! I read they are not good on snow and ice because the lugs are too big.Have you tried them on snow yet?
I also researched and posted the question on other forums and some people are actually running these on stock 7.5 inch rims with no problems.

 

[chimyz]

Like Harper said going bigger is usually not a problem, especially with offroad tires. The baja run 4 runner trail had 35" tires with stock offset 8" rims from fuel, lexus' lx570 baja truck also ran 35" tires on stock sized and offset 8" rims...it's done all the time. I wouldn't worry about 8". If you were trying to squeeze 305s on to 7.5 or 7" stock rims, that can get a bit more dangerous at speeds and speedy turning.

 

[Egstyle]

Ya I know that. That was a very big decision for me as I was torn between getting the 285/70/17 that fits rims 8-10.5 and the 305/65/17 that fit 8.5-11 . I went as far as to call BFG tech and they all said going down 1/2 inch size is not that big of deal on THESE tires as long as I'm not doing any high speed desert racing over 120mph where you get high side load pressures. They said these tires are practically indestructable.You know how good they are,your running them! I read they are not good on snow and ice because the lugs are too big.Have you tried them on snow yet?
I also researched and posted the question on other forums and some people are actually running these on stock 7.5 inch rims with no problems.

Right on. Yep, I never have a worry with these babies.

I have tried them in snow and mud/snow. Very impressed with them in mud/snow, though locking the rear diff was also an advantage. They were able to climb up a decent slope.

In pure snow, they struggled a little bit more. On about the same incline as the mud/snow, they just began to dig down and not progress, so I backed out. However, I have heard that siping will do wonders, though may decrease tire life or increase road noise? I think I'll wait until next winter, not much snow here this year. If you sipe them, they are pretty much unstoppable.

In pure mud, these babies are like a dream.

Looks like the 17" mojave's only come in a 8" wide rim? Wider rim would be nice simply for wider tire footprint, which I think will help you in every situation beside a thin layer of snow. I don't think it would look bad with the tire sticking out a little on the sides and might help protect the body. Nothing against your truck, because it is a beauty!

What mpg are you getting? I'm getting about 16.3, which I'm not thrilled about. Half city half interstate (80 mph). I do drive aggressively sometimes. I was thinking the mpg would come up if I didn't off road with it as much, but it hasn't seemed to. That being said, it is about the same mpg for extensive off-roading. The truck rarely has to go above 1000 rpm to climb a considerable incline, if you go slow. But I digress...

Have you taken it off-road yet?!

 

[T4Fun]

if you guys are saying a 1/2 inch is not a big deal, then i guess for all the limited owners here we are ok putting the 275/55 profile tires on our 20 inch rims (being a STUPID 7 inches wide) when the tire manufacturers clearly say the recommended rim width for this tire is atleast 7.5 inches? Thats just insane...I am calling bridgestone to verify if thats the case on their tires. If i can do that, then heck why look for aftermarket rim. I dont plan on doing much if any offroading so its fine for me to keep stock rims then. I just dont like the fact that they are narrow in width.