85 vs 86

[bobbfrommn]

Is there any difference in the front wheel from an 85 to an 86? I bought my buddy's bike (an 86) but since I had just put a new front tire on my 85 I swapped the wheels. Now I have two things, the breaks are squealing a bit at stops and the speedo seems about 3-4mph off at lower speeds and 5-7 mph at higher speeds.

I've never read about any difference but I thought I would check in.