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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Mon Jun 24, 2013 12:29 pm 
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I know I may be pushing it both in rim size and tyres but does anyone know if I could fit a set of 18x8.5 rims with 40 offset to a Series 1 RX7 with lipped/rolled guards and running 2 degrees negative camber at the front. Thinking of running 225/40x18 tyres all round.

cheers


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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Jul 03, 2013 4:59 pm 
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Rotary?... What The?

Joined: Wed Oct 27, 2010 9:02 am
Posts: 29
ravenoak wrote:
I know I may be pushing it both in rim size and tyres but does anyone know if I could fit a set of 18x8.5 rims with 40 offset to a Series 1 RX7 with lipped/rolled guards and running 2 degrees negative camber at the front. Thinking of running 225/40x18 tyres all round.

cheers


Another option. How about 18x8 with a 45 offset (same tyres)

Cheers


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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Sat Jul 16, 2016 4:03 pm 
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Can anyone tell me the factory center bore on the Mazda RX2?

This is proving to be a difficult measurement to find. Perhaps the guys running custom made simmons could help?


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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Jul 20, 2016 12:22 pm 
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II wrote:
Can anyone tell me the factory center bore on the Mazda RX2?

This is proving to be a difficult measurement to find. Perhaps the guys running custom made simmons could help?

pretty sure i have an original rim somewhere , i could measure the hole in the middle of the rim, if that helps ?

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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Jul 27, 2016 12:52 pm 
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RX3 + RX2 wrote:
II wrote:
Can anyone tell me the factory center bore on the Mazda RX2?

This is proving to be a difficult measurement to find. Perhaps the guys running custom made simmons could help?

pretty sure i have an original rim somewhere , i could measure the hole in the middle of the rim, if that helps ?


Yes if it is an original wheel it would be perfect thank you


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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Thu Jul 28, 2016 4:48 pm 
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Location: perth wa
i found my bolt on centres off capella diff this is the two bolt locator that bolts in the centre of axle this is just shy of 60mm say 59.7mm - my batteries were flat on vernias . hole in rim must be 60mm or slightly bigger - rim i checked not sure if 808/rx3 or rx2/capella rim.
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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Mon Aug 01, 2016 12:49 pm 
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Excellent thank you RX3+RX2


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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Nov 29, 2017 9:47 am 
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I'm looking at wheel options for a S2 RX7. Suspension completely stock. Offsets are confusing me to say the least, there seems to be some conflicting information.

Options I'm thinking about are black FR1s 17x7 and 17x8.5; optional offsets are +10/20/25/30/40.

Or possibly Lenso BSX in 16x7.5, or 17x7.5/17x8.5; offset options are +20/25/30/35.

Will a 7.5" fit on the front, in +20? Or is lower better ie. +10? The stock wheels with a 205 appear to be awfully close to the strut...

On the rear, will 8.5" fit and if so what is the best offset? +20 or lower ie. +10 or similar?

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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Nov 29, 2017 11:41 am 
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On the question of wheel width:

7.5" fronts is going to get extremely tight with standard struts. I have FR17s 17x7 at the front with 205 wide tyres. I need to pump the guards and there isn't much clearance on the strut side, so even with perfect offset, 7.5 is cutting it extremely fine. This is with only -1 deg of camber. More camber and it would be worse. 215 is about the max tyre you could reasonably fit. You will get a bit more clearance with coilovers I imagine. But you don't need a 7.5" wheel for that sort of tyre size anyway. 7" wide is fine if you look at the tyre fitment charts.

The other factor is steering effort - it's lot heavier as you increase the width. 1st gen steering was really designed of 13x5 wheels with 185/70/13 tyres.

8.5" wide should fit. There is more room there. I have 17x8 with 235 tyres and there's a little bit to play with. If offset is perfect, you *might* squeeze in 245s or maybe even 255s depending on the tyre height and suspension situation (you wouldn't want to lower it too much). Again though, 8 inch wide is plenty wide for a 1st gen and within the allowable size range for any tyres between 215-245 tread width, according to the charts I just looked at.

In light of the above, I would err on the side of narrower wheels if anything.

Offset then is a function of the wheel width you select.

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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Wed Nov 29, 2017 12:13 pm 
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I could easily just get 4x 17x7 at +20 and it would fit, probably looking too small at the back. Shame the FR1 only comes in 7" or 8.5". Cheers Greg.

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 Post subject: Re: Mazda Wheel Sizing: stud pattern and offsets
PostPosted: Tue Dec 05, 2017 11:08 am 
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Going with these:

http://www.performancewheels.com.au/pro ... ula-black/

Image

15x7 and 15x8 to retain the period look, these are exactly what I was after originally when I was hunting for V4s (which are insanely priced and often need rebuilding). If only suppliers would get back to me I want them before Christmas. :P Now the age old question, which offset?! :lol:

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