Mblock66 Posted September 7, 2006 Share Posted September 7, 2006 Gunmetal 5 spoke, polished lip 18x7.5” 5x100 bolt pattern Offset: +40 Thanks in advance. I have no idea what an offset does so i need help. I think the 5x100 is ok for us but the offset I have now idea. Matt Link to comment Share on other sites More sharing options...
rc0032 Posted September 7, 2006 Share Posted September 7, 2006 http://legacygt.com/forums/showthread.php?t=4426 Link to comment Share on other sites More sharing options...
lhsa Posted September 7, 2006 Share Posted September 7, 2006 probably not. not enough offset. i think 48 is the sweet spot for 18x7.5. i have the same size with 51 offset and it works well, even with a very noticeable drop from my suspension. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted September 7, 2006 Share Posted September 7, 2006 It'll fit. It just might not look right. It'll stick out a little bit more than ideal. Link to comment Share on other sites More sharing options...
PGT Posted September 7, 2006 Share Posted September 7, 2006 I sold some ET48 Volks because I didn't like how they fit up front. ET40 would be Link to comment Share on other sites More sharing options...
Mblock66 Posted September 7, 2006 Author Share Posted September 7, 2006 So an offset is what pushes the wheel out or inside the fender more? like <-----> that way. A 40 offset will make the wheel stick out past the fender? I jsut don't know what offset is. the 5X100 is the bolt pattern I get that. These are for Gram Lights that are discontinued and are sweet rims. I guess I have to pass Link to comment Share on other sites More sharing options...
rc0032 Posted September 7, 2006 Share Posted September 7, 2006 http://www.volvoadventures.com/wheels/wheel_offset.gif Link to comment Share on other sites More sharing options...
Mblock66 Posted September 7, 2006 Author Share Posted September 7, 2006 Hahah. Still don't get it. OFFSET (Positive) is the center of gravity of the rim? Forget it I have no clue. I will stick with the stock rims. Link to comment Share on other sites More sharing options...
Spec B Posted September 7, 2006 Share Posted September 7, 2006 With a 40 offset it will look sorta like this... Link to comment Share on other sites More sharing options...
PGT Posted September 7, 2006 Share Posted September 7, 2006 Hahah. Still don't get it. OFFSET (Positive) is the center of gravity of the rim? Forget it I have no clue. I will stick with the stock rims. zero offset means the mounting surface is smack in the middle of the rim. negative offset means the hub is towards the outside. positive means it's towards the inside. think of it like camber....how many degrees off vertical, or in this case, how many mm off center. Link to comment Share on other sites More sharing options...
Mblock66 Posted September 7, 2006 Author Share Posted September 7, 2006 So if I have this right.... if the center of the rim is 0 (on a rim on the right side of the car) This side is - offset | This side is + offset ------------------------++++++++++++++++++++++ This means that the more positive the offest the more towards the outside of the rim is the bolts. So since the stock offset is like 57mm or something going to 40mm would push the rim out of the fender by 17mm? Link to comment Share on other sites More sharing options...
bosco Posted September 7, 2006 Share Posted September 7, 2006 Gunmetal 5 spoke, polished lip 18x7.5” 5x100 bolt pattern Offset: +40 Thanks in advance. I have no idea what an offset does so i need help. I think the 5x100 is ok for us but the offset I have now idea. Matt no, not enough offset. i had 42mm once the tires stuck out of fender wells to much, have 48mm now, perfect. if you don't think 6mm is alot put it on the end of your nose then you'll see. bosco remember thats 12mm total Stay Stock Stay Happy Link to comment Share on other sites More sharing options...
PGT Posted September 7, 2006 Share Posted September 7, 2006 This means that the more positive the offest the more towards the outside of the rim is the bolts. So since the stock offset is like 57mm or something going to 40mm would push the rim out of the fender by 17mm? if the width is the same, yes. the offset number means nothing without the width figure. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted September 7, 2006 Share Posted September 7, 2006 I think this poster rolled his fenders to get them to fit. http://www.legacygt.com/forums/showthread.php?t=34688 Link to comment Share on other sites More sharing options...
Xenonk Posted September 7, 2006 Share Posted September 7, 2006 Offset is the distance between the mounting point to the centerline of the rim. Offset is dependent on the width of the rim. For your converting uses, 25.4mm = 1" Example: you have a 8" wide rim, so having a 0 offset on a 8" would mean you have 4" to the shock/brake caliper side of the rim, and 4" to the fender of the rim. you have a 8" wide rim, so having a +25mm offset on a 8" would mean you have 5" to shock/brake caliper side of the rim, and 3" to the fender side of the rim.. basically you shoved the rim further INTO the wheel well. A stock rim is only 7" wide, not 7.5", so that comes into play. It's easier to draw it out on graph paper (old school engineering) if you need a picture of how wide the rim is compared to the offset. Here's a good way of thinking it if you wanted a deep dish lip to the rim, you can use the Axis site to help you picture it all: http://www.axiswheels.com/widetrack_guide.html http://www.tireguides.com/images/offset.jpg Just remember, the wider the rim you go, the more you have to look into getting the proper offset you need to compensate for the extra width so that you dont rub on things (shocks or fender). Another example: Say you have 10" worth of room in your fender and say that your stock rims are already super close to rubbing the shocks. So what happens if you want a wider rim? What offset do you need to get for a 8" or 9" rim?? You have a 7" wide wheel with a +50mm offset. Center line of your rim is 3.5", since it's a 50mm offset (remember 25mm ~ 1 inch), so that means your mounting point is 2" away from the center line of the rim, since it's POSITIVE offset, the offset is moving the rim closer to the shock side, so in your case it's: shock spring|fender edge brake caliper|face or lip ----5.5"----|----1.5"---- = total 7" wide wheel So for a 8" rim you need to work some math based on that you know you have 5.5" for backspacing: shock spring|fender edge brake caliper|face or lip ----5.5"----|----2.5"---- = total 8" wide wheel the center line of a 8" wheel is 4", but you have 5.5" worth of backspacing.. so it's 4" + 1.5" = 5.5", which is the same way as saying +1.5" = +37mm. So for a 9" rim you need to work some math based on that you know you have 5.5" for backspacing: shock spring|fender edge brake caliper|face or lip ----5.5"----|----3.5"---- = total 9" wide wheel the center line of a 9" wheel is 4.5", but you have 5.5" worth of backspacing.. so it's 4.5" + 1" = 5.5", which is the same way as saying +1" = +25mm. Once you draw it out on paper, it's much easier to understand. It's possible to fit a 18x7.5 +40mm on the car, it's just that it might rub on the fender.. you can run a narrower tire (aka stretch a skinny tire over a wide rim) so that the shoulders are rounded off rather than squared off, but you'll have more of a chance for curb rashes and such as the lip is exposed.. here are some exaggerated pictures of stretched tires: http://driftunit.com/photos/S14/jline/JLine_S14_1.jpg http://i2.photobucket.com/albums/y22/brmd56/stretched.jpg http://members.aol.com/elledechanel/stretch.jpg Keefe Link to comment Share on other sites More sharing options...
PGT Posted September 7, 2006 Share Posted September 7, 2006 also a good tool Link to comment Share on other sites More sharing options...
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