plural Posted December 3, 2019 Share Posted December 3, 2019 Hi all! New z owner. Quick question after some research on this: In looking at 15x10 setups, noticed some folks running on ZG flares: 15x10 -25 (4.5 bs) all around, or 15x10 -38 (4 bs) Front, and 15x10 -25 (4.5 bs) Rear What I'm not sure is why some are running less backspace on the fronts. Is this 1) to acheive a square setup (assuming the 280z hubs front and back aren't square from the factory, or 2) to push the fronts wider for flare fitment purposes? Or maybe 3) for suspension clearance? Obviously I'm trying to achieve a flush look on the ZG flares. I'd assume the difference in offset is for reason #2, but wanted to check with some that might have some experience or knowledge on this. Thank you so much! Quote Link to comment Share on other sites More sharing options...
Ereschkigal Posted December 3, 2019 Share Posted December 3, 2019 Have you looked here? https://www.rimtuck.com/search/thumbnails?make=Datsun&model=240Z or https://www.rimtuck.com/search/thumbnails?make=Datsun&model=280Z With the standard ZG flares your wheels will probably stick out. Quote Link to comment Share on other sites More sharing options...
plural Posted December 3, 2019 Author Share Posted December 3, 2019 Yep I've checked those out. This fella in the first link is running the 15x10 -38 (4 bs) front/15x10 -25 (4.5 bs) rear setup on what looks to be standard ZG flares. Doesn't seem to poke. Here's another with the same on the ZG flares (the comicartist guy): https://forums.hybridz.org/topic/111568-aggressive-fitment-for-zg-flares/ But still curious about the reasoning behind the staggered (front -38) offset. Quote Link to comment Share on other sites More sharing options...
Ben280 Posted December 5, 2019 Share Posted December 5, 2019 A 15x10 -25 in the front will hit the steering knuckle ball joint. Even a -38 comes close. Quote Link to comment Share on other sites More sharing options...
jhm Posted December 5, 2019 Share Posted December 5, 2019 (edited) What suspension are you running?? These kinds of wheel widths/backspacings will have significant interference with the stock strut spring perches. I also suspect those wheels & tires will have intereference issues with the frame rails on the front at full lock. Edited December 5, 2019 by jhm Quote Link to comment Share on other sites More sharing options...
plural Posted December 6, 2019 Author Share Posted December 6, 2019 jhm, I'm running coilovers currently. Ben - that makes sense -w- the steering knuckle. So seems its probably a clearance thing. Quote Link to comment Share on other sites More sharing options...
Ben280 Posted December 6, 2019 Share Posted December 6, 2019 1 hour ago, jhm said: What suspension are you running?? These kinds of wheel widths/backspacings will have significant interference with the stock strut spring perches. I also suspect those wheels & tires will have intereference issues with the frame rails on the front at full lock. You'll be fine on the frame. There's a lot of suspension arms and sway bar to run into before you hit the body of the car, and even those are tricky to hit. I had wheels in almost the exact same spec (mine were 15x10 4.5"BS and 15x11 5"BS). Only reason it works was I used a quick steer knuckle, bringing the tie-rod closer to the hub and more inboard. Quote Link to comment Share on other sites More sharing options...
plural Posted December 6, 2019 Author Share Posted December 6, 2019 Thinking about this more - I suppose the lower backspacing on the front (given the same wheel size) actually staggers the setup to front? Think this can be offset by running narrower tires up front - like 225/235? Thanks so far for the input! Quote Link to comment Share on other sites More sharing options...
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