Print Page - 18" x 8" 40mm offset

Title: 18" x 8" 40mm offset
Post by: gavin on February 16, 2005, 07:21:41 PM

seen a nice set of wheels but the guy only has 18x8 with 40mm offset would these fit ok and what size of tyres would you recomend, would have preffered 8.5 front 9.5 rear, would 8s be ok

Title: 18" x 8" 40mm offset
Post by: t2rew on February 17, 2005, 06:21:20 PM

depends how cheap they are. if you want bigger wheels buy bigger wheels. youll only end up kicking yourself if you decide you made the wrong decision later on.

im guessing but 255/265 should fit :confused:

Title: 18" x 8" 40mm offset
Post by: gavin on February 17, 2005, 06:34:52 PM

what about the offsets 40mm
im sure the rx8 has that offset and are 8" wide,
have seen these fited to rx7s,
any ideas am really thinking of buying them tonight
:D also what about trye sizes will 225/40/18 be ok

Title: 18" x 8" 40mm offset
Post by: t2rew on February 17, 2005, 07:43:01 PM

i think fd\'s have a 50mm ofset. 40mm offset will put the wheels out to the arch by 10mm. they will fit though

Title: 18" x 8" 40mm offset
Post by: zevans on February 17, 2005, 07:58:23 PM

...and if you don\'t buy them gizza shout...

Title: 18" x 8" 40mm offset
Post by: FxF on February 20, 2005, 10:34:15 AM

QuoteOriginally posted by t2rew
i think fd\'s have a 50mm ofset. 40mm offset will put the wheels out to the arch by 10mm. they will fit though

Sorry, but both FCs and FDs have ET40 (offset).
I am not 100% sure that the RX-8 has ET40 too.

-Fanis

Title: 18" x 8" 40mm offset
Post by: t2rew on February 20, 2005, 11:54:19 AM

i read on one of the american fc site\'s a long time ago that the fc was 35mm.

the fd is definatly not the same as the fc as there is a hub adapter for a fc with fd wheels to get the fd wheels to sit further out. so im farly sure they are 50mm.

just to satisfy my need to know i have just took a wheel off to check and guess what.

Title: 18" x 8" 40mm offset
Post by: Shark on February 20, 2005, 12:14:37 PM

offset of 40 should be okay, rear certainly no problem, front should be fine.

225/40 R 18 will mean a 0.95% increase in diameter so your speedo will be showing about 3% less than the speed your doing.

245/35 R 18 would mean a 0.32% decrease in diameter so your speedo would be about 1% more than actual speed.

I\'d go for the 245\'s bud but check tyre prices for 18\'s if cash is an issue - the tyre price increase from 17" rims to 18" rims is pretty significant.

HTH - you can check other sizes here (http://www.tyresave.co.uk/tyresize.html)

Title: 18" x 8" 40mm offset
Post by: gavin on February 20, 2005, 02:30:51 PM

thanks guys

hope they fit ok havent got tyres as yet, still looking at the mo, expensive so may end up with a good quality part worn set, rather than cheap nangkan\'s,
can someone confirm the centre bore size is 59.5 please

Title: 18" x 8" 40mm offset
Post by: t2rew on February 20, 2005, 02:32:55 PM

I THINK ITS BIGGER THAN THAT

ill just go and look

Title: 18" x 8" 40mm offset
Post by: t2rew on February 20, 2005, 02:34:56 PM

67mm

Title: 18" x 8" 40mm offset
Post by: gavin on February 20, 2005, 04:17:05 PM

where did you find that info about the centre bore size, i looked but only found 59.5

Title: 18" x 8" 40mm offset
Post by: FxF on February 20, 2005, 08:51:52 PM

QuoteOriginally posted by t2rew
i read on one of the american fc site\'s a long time ago that the fc was 35mm.

the fd is definatly not the same as the fc as there is a hub adapter to get the wheels to sit further out. so im farly sure they are 50mm.

just to satisfy my need to know i have just took a wheel off to check and guess what.

Regarding the FC3S offset you found it by yourself.
Just look what Rays Wheels (Volk Racing) gives for the FD3S and the SE3P. The +40 is the offset.
http://www.rayswheels.co.jp/cgi-bin/cgi2/matching.cgi?modelName=SE37K&inchIndex=1

Mazda Rotary Club

General => General Technical => Wheels & Tyres, Suspension & Brakes => Topic started by: gavin on February 16, 2005, 07:21:41 PM