I'm contemplating wheel spacers for the rear of my ZR2, and just wanted to bounce pro's, cons around here first before spending the modest coin.
The factory track width on a ZR2 is appx. 1.5" narrower in the rear than in the front. According to a GM engineer, this is simply so that they wouldn't have to engineer/stock a whole separate axle to match the limited-production model's oddball front end.
I'm thinking, either leave it stock - or add 1" spacers to rear so that the rear is almost exactly inline with the front - or adding 2" spacers to the rear plus 1.25" spacers to the front. According to other ZR2 owners (who install these spacers typically just for looks) - there will be no concerns of fender interference with those sizes or smaller. Cost is negligible.. about $120 for the whole enchilada or half that for just the rears.
First things first, I'm not even the slightest bit concerned about the mechanical fitness of the spacers themselves nor the increased leverage on the axle end bearings, for the purpose of this thread.
So... what I can think of so far for pro's:
- Wider stance presumably means more stable, right?
- Wider tire offset typically offers better sheet metal protection in rocky or wooded terrain.
- longer suspension lateral arc length (on a live axle) = effectively more travel, right?
- more leverage outside spring position = more forced articulation (more weight on drooped tire)
- will partially expose rear brake disc to fresh airstream, better cooling?
- looks cool :P
- Putting rear tire exactly in-track with front may reduce flotation
- more tire exposed to wind while driving may increase noise, decrease fuel efficiency
- will partially expose rear brake disc... to destruction?
Any other thoughts on the topic?