Replacement Wheels backspace and offsets??

[WAckerman]

So I'm looking at replacing my factory alloys with some new wheels. I have the stock tires on now but the next set will be 285/70/17's, and I don't want them to stick out very much past the fenders. So that brings up a couple questions.



First, what exactly do the backspace and offset numbers mean?



Second, what should I look for in the backspace and offset to get a wheel that will keep the tires within the fenders? I don't mind them moving out a little, but I would like to keep 'em tucked in.



Third, is our bolt pattern the 8 on 165 or the 8 on 170? I was thinking that Ferd used the 8 on 170... but I can't remember anything anymore.



The wheel I really like is the MKW M41 wheel. http://www.mkwheel.com/



They seem to have some pretty cool wheels, but I'm a little concerned that they don't print any weight ratings on the wheels. Is that something that no one does anymore?



Lastly, has anyone had any experience with this manufacturer?



Sorry for all the questions...



TIA!

 

[nickleinonen]

our bolt pattern is 8x6. 5" which works out to 8x 165. 1mm. stock wheels have 6" backspacing or so [i have never actually measured mine, and others have said 6" to 6. 5"

 

[JVolpe]

I have measured the stock 17x8 wheels and depending on the straight edge, ruler and wheel they are about 6. 2" backspacing with +42mm offset. Anything close to that backspacing/offset with 285s should not stick out or have rubbing issues.

 

[CStraface]

First, what exactly do the backspace and offset numbers mean?

This might help a bit...

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[WAckerman]

CStraface, thats exactly what I needed! Thank you.



So if the stock wheels are in the 6" backspace range, does anyone make replacement wheels in that range? As I'm looking around the vast majority seem to be around 4. 5" backspace.

 

[CStockton]

CStraface, thats exactly what I needed! Thank you.

So if the stock wheels are in the 6" backspace range, does anyone make replacement wheels in that range? As I'm looking around the vast majority seem to be around 4. 5" backspace.

Centerline has an 17X8. 5 wheel with 6" backspace and +42mm offset.
http://centerlinewheels.com/wheel_deals_detail.php?id=12254&type=vehicle&data=11

 

[WAckerman]

Centerline has an 17X8. 5 wheel with 6" backspace and +42mm offset.

http://centerlinewheels.com/wheel_deals_detail.php?id=12254&type=vehicle&data=11

Thanks! I had completely forgot about Centerline. There are a couple pretty nice looking wheels on there. I like that they make them as direct replacements for these trucks. Looks like a little more than I had hoped to go, but if I can get the look I'm after I'll be OK.

 

[Graphite 6]

The Schwab should have those weight answers for you. I do like the MKW's, but need to go there myself. I believe Weld also make the proper B/S, and forged wheels to boot. Another item to consider is do you want forged or cast wheels, H2 wheels will have the same weight ratings you need are easily found, I think they are forged also?? And having the hubs bored is also simple. As I'm in the same boat as you, and doing homework just reveals more questions. Let us know what you decide.

 

[HLewallen]

Discount tire now has some wheels with reasonable backspacing for our trucks that are made by their in-house brand "MB Wheels". They should have appropriate load ratings (they can check). I am considering the "72" for my '07. I am also considering the Thug/Cannon wheel by American racing, but they will stick out a touch more (1 3/8" to 2" depending on size). Ultra Wheels has a couple that will fit if I remember correctly. Centerlines are a little pricey for me unless they are on clearance.

 

[WAckerman]

Heath,

Thanks for the heads up on those MB wheels at Discount. They have some nice looking stuff on there, I was a little disappointed that they didn't call out the backspacing and offset on any of the wheels on the website. I'll have to drop by a Discount and see what they come in. Price is a lot better than the Centerlines as well. My wife would love to hear that I want to spend another 2k on the Centerline wheels :-{}



Graphite 6,

I hadn't thought too much about the H2 wheels... its a consideration though!



One thing I might try is to just powdercoat these stock wheels (or pick up a set of takeoffs) a dark grey or silver. I know there has been talk on here about having that done and taking the centercaps off, but I like the look of the wheels with the caps on better. Is it possible to have the caps coated or painted as well?

 

[HLewallen]

Backspacing is listed on all the wheels on Discounttire.com - it is in the little descriptive line containing the diameter and width. The 17x8. 5 MB "72" shows:

17X8. 5 8-165. 1 25MM (72522)

which means 25mm offset. That's about 20mm less than stock (about 4/5s of an inch) and it is a half inch wider (so add another 1/4 inch) so this wheel should stick out a hair over an inch. The 18x9 is also 25mm offset, so it should stick out a hair over 1. 25". Note as far as I can figure, the backspacing on the 18x9 is just about 6" - almost stock. I am almost settled on getting the 18x9 "72"s for my 07. 5.

 

[Ereynolds72]

Why not save some money and put them on the stock wheels? 285s will go on there nicely. Unless you just want a different look, the stock alloys are excellent quality.