«

»

Aug
23

How to measure wheel offset.

First you’ll have to understand what wheel offset is, Honda Tuning did a great article explaining wheel offset, please check it out here 

Here’s how to find out what offset you have on your wheel.

(Non mounted wheel preferred)

1.   First of all, you need few straight-edge rulers, in this case, we used 1 ft. and 3 ft long.    Then measure from edge to edge to get the overall width of the wheel.  Noted that we used ruler with millimeter indicators.   The number we got is 260 mm.

or

with a standard tape measure, we got  about 10 1/4 inch.

To convert 10 1/4 to mm, 10.25 x 25.4 = 260.35,  let’s round it down to 260.

2.   Face down the wheel on a flat floor, make sure nothing would scratch the face or lip of the wheel.   Lay a long straight edge ruler across, I made sure that is perfectly straight line, so when I put a second ruler down to the hub surface of the wheel, I could get a precise number.  And the number is 171 mm.  The result is also known as Back Spacing.

3.  Here come the calculation part,  take the first number and divide it by 2, as it will give you where Zero offset is located.   260 / 2 = 130 mm

4.  Now subtract 130 from the Back Spacing number (171)

171-130 = 41

5.  The correct offset of this wheel is 41 mm

14 pings

  1. offset math check...think i got it... - G35Driver says:

    […] you've ever bought used wheels where the stickers were removed or barrels have been changed out. How to measure offset __________________ 94 RX7 […]

  2. How to measure wheel width. | More Japan Blog says:

    […] rims?  So you would need a replacement wheel.  Unfortunately, you forgot the size, width, and offset.  And you couldn’t find any stickers on the barrel or any numbers stamped in the back of the […]

  3. FS: 20" Makaveli Dante 3pc Forged Wheels Staggered with Lip for 2003-2007 G35 Coupe - G35Driver says:

    […] to measure wheel offset https://www.more-japan.com/blogs/2011…ut-the-offset/ __________________ G35Driver Common Sense […]

  4. [For Sale] Custom Wheels - Page 2 - Nissan 370Z Forum says:

    […] […]

  5. Witch tires do u guys recomend? - DSM Forums says:

    […] […]

  6. Offset for 6.5" wide rims? - RX7Club.com says:

    […] […]

  7. Foxbody Wheel Picture Thread - Page 206 - Ford Mustang Forums : Corral.net Mustang Forum says:

    […] wheel, and then measure straight down from that straight edge to the mounting face of the wheel (like so). Let us know what you get for that measurement, and also confirm the width (see below). Where did […]

  8. 5 Lug conversion wheel size - Ford Mustang Forums : Corral.net Mustang Forum says:

    […] the wheel). Measure straight down from the straight edge to the mounting face of the wheel, like in the 3rd picture here; if they're OEM SN95 Bullitt wheels you should get ~5-3/4" (advertised BS was […]

  9. 2014 CTS V-SPORT Wheel Fitment Numbers says:

    […] Merged with another thread that asked the same question a while back. Has anyone pulled the wheels off to see if the information is somewhere on the wheel? If it's not cast or engraved on the wheel, then do this – https://www.more-japan.com/blogs/2011…ut-the-offset/. […]

  10. 88 LX W/ 17X9 Bullitt Wheels Rubbing Struts - Ford Mustang Forums : Corral.net Mustang Forum says:

    […] the wheel). Measure straight down from the straight edge to the mounting face of the wheel, like in the 3rd picture here. __________________ '89 GT convertible, N/A 357W, MM front susp w/425# coil-overs and Koni […]

  11. Stanced Prius C | Megacarwall.info says:

    […] How to measure wheel offset. » more japan blog […]

  12. Dumb question - D-series.org says:

    […] […]

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.