Rim Offset Information (How to determin) - MudInMyBlood Forums
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post #1 of 25 Old 01-22-2010, 07:34 AM Thread Starter
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Rim Offset Information (How to determin)

  • Wheel Offset: Distance between wheel mounting surface where bolted to hub of drum and centerline of rim. Determines vehicles “track” or distance between tires on each axle. Keep the wheel offsets as close to original as possible to avoid steering difficulties or wheel bearing fatigue.




  • Spacing: The first number is the inside spacing (from the back of the rim to the the hub) the second number is the front spacing (from the front of the rim to the the hub). So this would be a 7" wide rim, with 5" from the back of the rim to the hub and 2" from the front of the rim to the hub. If you buy an 8" wide rim this number would most likely change to 5/3 or 5+3 If you wanted WIDE or SRA rims, then the numbers would be roughly reversed, like 3/5 or 3+5 etc... Some 7" wheels might have the offest of 4/3 o 4+3. Instead of 5/2. this is going to make your wheels stick out 1" farther, but should still work fine in the application's of IRS machines without sticking way out from under the fender, or being to wide on trails.





  • The easiest way to measure backspace is to lay the wheel face down onto the ground so the backside of the wheel is facing up. Take a straight edge and lay it diagonally across the inboard flange of the wheel. Take a tape measure and measure the distance from where the straight edge contacts the inboard flange to the hub mounting pad of the wheel. This measurement is backspace. The photo below shows three wheels with 2",3", & 4" backspace.



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post #2 of 25 Old 02-17-2011, 11:56 AM
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post #3 of 25 Old 02-22-2011, 04:25 PM
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Hey i got a 08 brute 750 i have 28'' maxxis zillas and i mounted them onto my OEM rims when i turn they rub a little bit and some times the back one rubs on the gas tank guard. instead of buying wheel spacers i heard if i buy a aftermarket rim with a certain offset this will eliminate the problem? if so what offset do i get?

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post #4 of 25 Old 02-22-2011, 04:38 PM
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yes if you buy IRS offset rims 5+2 then it will cure the rubbing. The stock rims are more like a 6+1

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post #5 of 25 Old 02-22-2011, 04:40 PM
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The stock off sets are 5.5+1.5 if i get a 4+3 that should make it more wider right?

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post #6 of 25 Old 02-22-2011, 04:43 PM
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yes it will be wider see 1st two post to see why, but a 5+2 is plenty for any width tire unless you just want to go wider or thats all thats offered

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post #7 of 25 Old 02-22-2011, 07:09 PM
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Check out the pics in this post for a comparison of 5+2 AND 2+5 offset wheels on the brute. The 2+5 (wide stance) do still scrub slightly with 29.5 laws at full lock, but after following the howto remold the inner fenders, it doesn't scrub.

5+2 pics (aka irs wheels)
https://www.mudinmyblood.net/forum/sh...6&postcount=13

2+5 (aka deep dish, sra wheels, wide stance)
https://www.mudinmyblood.net/forum/sh...7&postcount=14

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post #8 of 25 Old 11-28-2012, 06:09 PM
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Here's a pic of my 05 750 with 8" x 14" ITP wheels 26 x 9 front/26 x 11 rear Bounty Hunter tires - since they're 8" rims,I believe these would be a 2 + 6 backspacing.
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post #9 of 25 Old 08-19-2013, 04:44 PM
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are some 14x6 wheels too narrow for some 31-9.5-14 laws

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post #10 of 25 Old 08-19-2013, 07:02 PM
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Quote:
Originally Posted by jpence View Post
are some 14x6 wheels too narrow for some 31-9.5-14 laws
All 14x6" wheels should be the same width, 6". That's why they're 6" wide. If it were narrower it would be say 5.5" or if it were wider it would commonly be 7" wide.

So what are you trying to ask?
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post #11 of 25 Old 08-19-2013, 07:34 PM
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well thats exactly what im askin. are they too narrow for the tires? do i need a 14x7 or 14x8 instead? or will the 14x6 work?

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post #12 of 25 Old 08-20-2013, 09:50 AM
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Quote:
Originally Posted by jpence View Post
well thats exactly what im askin. are they too narrow for the tires? do i need a 14x7 or 14x8 instead? or will the 14x6 work?
They won't be too narrow. What you have to worry about is getting the wheels too wide. If the rim is too wide, it will stick out past the edge of the tire. Making the bead hit every rut first before the tire hits it. Constant leaks at the bead. Get no wider than 7" rims or you'll have issues. A 6" rim will be fine.

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post #13 of 25 Old 08-20-2013, 11:29 AM
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thanks alot thats exactly what i needed to know

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post #14 of 25 Old 10-19-2013, 12:05 PM
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has anyone tried the STI C7 wheels on the Brute?

12" Kaw Brute Force C7 Deep Dish 2 5 Offset Aluminum ATV Wheels New Set 4 | eBay

These are 12X7, have a 2+5 offset, and say they are 2.5" wider per corner.. 5" wider track all around.
How much extra stress would these put on the wheel bearings??

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post #15 of 25 Old 10-19-2013, 01:42 PM
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Quote:
Originally Posted by mjn View Post
has anyone tried the STI C7 wheels on the Brute?

12" Kaw Brute Force C7 Deep Dish 2 5 Offset Aluminum ATV Wheels New Set 4 | eBay

These are 12X7, have a 2+5 offset, and say they are 2.5" wider per corner.. 5" wider track all around.
How much extra stress would these put on the wheel bearings??
2+5 are for SRAs not IRSs. They would play hell with bearings,ball joints and knuckles. If you have an IRS, you want the first number higher or the same as the second number. Look for 5+2,4+3,4+2, 5+3 or 4+4, 3.5+3.5.

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