No, it's funny, I can see that there is supposed to be a third image below your excel pictures, (very cool, btw) but it is not showing on my screen.
Okay let's try this again! Check above...
No, it's funny, I can see that there is supposed to be a third image below your excel pictures, (very cool, btw) but it is not showing on my screen.
I figured I would also post some math in here for folks that want to know more (or correct me ) about offset calculation. I honestly wasn't sure what I bought. I figured I had 16x8 square wheels. When working with them this weekend I kept thinking - this one wheel looks bigger. The tires were the same width which threw me off.
So - to measure the wheels, use a board that just spans the lip. Using your handy metric tape measure (get with the times people - you own a german car! ), measure the distance from the mounting flange to the bottom of the board. Repeat on both sides.
Now you would measure the distance from the barrel lip to the wheel flange. If your wheel flange is removed, you can measure it on a table. Borrowing my measurement from the previous page, the wheel flange to mounting surface is 25.59 (basically 1").
These are the measurements I got:
Front:
Front Lip to face mount: 65mm
Barrel Lip to face mount: 125mm
Face Mount thickness: 10mm
Face wheel flange to mounting surface: 25.59
Overall Wheel Width: 200mm (65mm + 125mm + 10mm)
Calculated Front Offset:
The front wheel is 200mm thick. The center of the wheel is 100mm. The barrel is 125mm plus 10mm for the face mount. That's 135mm, or 35mm over center. Now reduce that number by 25.59 for the face. That comes out to 10.59, which is basically ET11, the sweet spot for a 7" e9 wheel. Keep in mind that 200mm is 7.87" (200 divided by 25.4). That is a 7" wheel, as the tire mounting area isn't included in the width.
Rear:
Front Lip to face mount: 65mm
Barrel Lip to face mount: 152mm
Face Mount thickness: 10mm
Face wheel flange to mounting surface: 25.59
Overall Wheel Width: 225mm (65mm + 152mm + 10mm)
Calculated Front Offset:
The rear wheel is 227mm thick. The center of the wheel is 113.5mm. The barrel is 152mm plus 10mm for the face mount. That's 162mm, or 48.5mm over center. Now reduce that number by 25.59 for the face. That comes out to 22.91, which is basically ET23, the sweet spot for an 8" e9 wheel. Keep in mind that 227mm is 8.93" (227 divided by 25.4). That is an 8" wheel, as the tire mounting area isn't included in the width.
repainted wheels look great. for masking the centers i use 1/16" tape from a auto paint supply store, you can set the edge without tearing a million pieces. Then come back with a wider tape.
Great thread! I love the outside of the box thinking. I did the complete opposite, I turned a 16"x8" Alpina in to a 16"x6".
If you have an old oven that works a treat
and another set of Weds saved!
Mine were a little corroded, but not that bad. Still, I had a few bolts that soaked for days and a few of them needed the full oxy acetylene treatment. Make them glow bright red and they'll give up eventually.