(x-post) Help with brake upgrade!

[pontifex4]

I'm attempting to install a set of rotors from what I thought was a 951 on my '88 N/A.

I have installed:
- late-offset 951 spindles (non-M030),
- late-offset 951 (non-M030) calipers
- my original hubs

BUT: the used rotors I have won't fit over the wheel studs. Am I crazy, or do I need a different hub or rotor?

One of the front rotors I have is pictured beside my old N/A rotor from the same corner. The holes are bigger, and there is substantially more offset on the N/A rotor (the N/A rotor will fit under the caliper if mounted, but is obviously too small). The one on the left doesn't look right to me.

[Techno Duck]

Looks like an early offset rotor to me.

[kdjones2000]

Yep...

[pontifex4]

Thanks, guys. Never having had them apart, I didn't know what they looked like, and couldn't account for the different hub-hat relationship. Wrong rotors.

I have a pair of late rotors to try, thanks to someone local.

I hate knowing so little about this stuff!

[Crepitus]

Please keep us posted. I am planing the same swap on my 87 na

[pontifex4]

I will. I'm hoping to have it back on the road this weekend, and I'll start a new thread then with some pictures and my impressions.