small rear offset is 2.5 or 2.66 or ?

[robvert]

Confused. Measuring for a rear disk wilwood brake kit and I get approx 2-3/16. no where near 2.50. Even if I include the axle housing flange it's not close to 2.50.

I also measured to make sure it's a small 8 inch rear. Per wilwood's flange diagrams it definitely is. I am almost certain nothing was ever done to the rear... axle or otherwise, it should be stock.

Any idea what's going on?

[chillininnh]

I can't help you out with your question but I am currently shopping disc brakes and this is why Wilwoods are not on my list. I don't like how they affect the track width.

[robvert]

Originally Posted by chillininnh

I can't help you out with your question but I am currently shopping disc brakes and this is why Wilwoods are not on my list. I don't like how they affect the track width.

The Wilwood kits in the past increased track width for their front kits (like 3/4 inch)... they have re-designed their kits so not anymore according to their phone rep and website. Some of their other kits may since there are many variables and many applications but he said those are quarter of an inch or less.

Bottom line... with the kits I'm looking at, that will fit a 16" wheel, there won't be a track width change.

[robvert]

hmmm, nobody understands this rear axle offset stuff? OK let me ask it another way…

Can anyone tell me if the diagram I posted above is the correct way to measure rear axle offset?

If the diagram is wrong and I have to measure to the axle housing rather than to the flange then I assume that means I'd have to take my brakes and backing plate off in order to get a good measure… if so, I am not going to go through that.

I called wilwood tech and he wasn't too much help… he thought the axles in there now were too short and/or something about the wheel bearings seated wrong… whatever he was saying didn't make sense, granted I don't have a better explanation given my lack of knowledge on rear axles but what he said didn't seem feasible. My rear end is stock and it has never had any problems (with me as owner) and the stock rear drum brakes fit fine… I would think if the axle was short or whatever the drums wouldn't fit properly (…I don't know). That's why I'm wondering now if their diagram is illustrated properly.

[Nachtwulf]

when I had to measure for a complete new axle housing including Willwood disk brake I had to measure from the axle face to the housing end face. I was having trouble getting the 2.5" offset measurement until I installed the axle as I was measuring to the bearing from the flange face not realizing that the bearing was not flush with the housing end when installed.
The diagram is correct.
hope this helps,

-Dale-

[robvert]

Originally Posted by Nachtwulf

when I had to measure for a complete new axle housing including Willwood disk brake I had to measure from the axle face to the housing end face. I was having trouble getting the 2.5" offset measurement until I installed the axle as I was measuring to the bearing from the flange face not realizing that the bearing was not flush with the housing end when installed.
The diagram is correct.
hope this helps,

-Dale-

thank you Dale. I keep re-reading your post... I think I understand, until you say "the diagram is correct". The diagram shows to measure from the end of the axle flange to the axle housing FLANGE. I am getting 2-3/16 when I do that. What I hear you saying is to measure to the housing end ("axle tube" in wilwood diagram). Therefore I would have to take into consideration everything between the axle housing flange and the 'axle tube'... which I think will include the flange thickness and the backing plate (i think that's it)... and maybe all that will add up to 2.50 (or 2.66). So, if that is correct I'd say the diagram is wrong, right?

[Nachtwulf]

Originally Posted by robvert

thank you Dale. I keep re-reading your post... I think I understand, until you say "the diagram is correct". The diagram shows to measure from the end of the axle flange to the axle housing FLANGE. I am getting 2-3/16 when I do that. What I hear you saying is to measure to the housing end ("axle tube" in wilwood diagram). Therefore I would have to take into consideration everything between the axle housing flange and the 'axle tube'... which I think will include the flange thickness and the backing plate (i think that's it)... and maybe all that will add up to 2.50 (or 2.66). So, if that is correct I'd say the diagram is wrong, right?

Robert, What I meant to say...... The measurement should be from the outside face of the axle flange to the outside face of the housing end with the axle installed in the housing. So no, it would not include the thickness of the housing end but it would include the thickness of the axle flange. sorry if I was confusing in my first post. Do you have pictures?