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Has anyone had any experience fitting 18x10.5 20p on the rear of their 4wd (non-hicas) Stageas? I currently have 18x9.5 25p all round and they fit nicely, but I really want the aggressive profile of the 10.5 for the rears. My 4wd system is physically disengaged so a stagger set up isn’t a problem for my stagea at this time. 
I’ve got Bc golds coilovers & would camber arms help with the fitment?

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I don't have direct experience with that. I can say on my HICAS stagea that stock R34 GTR wheels (18x9 +30) stick out about 10mm so your 18x9+25 must be very flush or already sticking out a little. They do tuck into the guards under load if that is your concern without extra camber required.

Unless I can't use calculators, 18x10.5 +20 will sit 20mm further out than current, so you are going to need hilux flares unless you are going for the pokie outie look. No idea how the inner clearance is, seems like it would be OK (14mm less than your current, so you could get under and check)

I use this site for offset calcs https://tiresize.com/wheel-offset-calculator/

9 hours ago, Duncan said:

I don't have direct experience with that. I can say on my HICAS stagea that stock R34 GTR wheels (18x9 +30) stick out about 10mm so your 18x9+25 must be very flush or already sticking out a little. They do tuck into the guards under load if that is your concern without extra camber required.

Unless I can't use calculators, 18x10.5 +20 will sit 20mm further out than current, so you are going to need hilux flares unless you are going for the pokie outie look. No idea how the inner clearance is, seems like it would be OK (14mm less than your current, so you could get under and check)

I use this site for offset calcs https://tiresize.com/wheel-offset-calculator/

I used will it fit website like the reply below shows, it’s about 1.77 cm out more but look at my car at the moment, I think it may work the car still has a bit lower to go as it’s not wheel to fenders yet, guards also untouched.

34CF215B-9D4D-47CA-98F3-BDB6B1ABADC0.jpeg

Depends on how much camber & stretch etc you're happy with but I'd say be a bit much, as Duncan says will probably poke about 17mm more than what you have now so up to you if that's what you want, camber arms will help in terms of giving it enough camber to get he top of the tyre under, that much camber isn't road legal in some places

I'd say the 9.5 +25 is pretty max already 

2 hours ago, WMDC35 said:

hat much camber isn't road legal in some places

Not to mention stupid on a road car, and leading to no longitudinal grip (from running only on the inside edge of the tyre) and only getting lateral grip when literally driving at 10/10ths so as to roll up onto the full tyre face in corners.

Can't see it having less than about 5 degrees of camber so as a daily road car will murder the inside edge so be flipping or replacing the tyres pretty regularly, & no grip really anywhere, hopefully not going high enough speeds at 10/10ths on the road to roll up that much camber.

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