front wheels/tires- will these fit?

AndreS · 03-20-2008, 04:12 AM

I found an OK deal on some centerline wheels, I just don't know if they will fit /o rubbing the fender.

wheels are 15x4 with 1.625" backspace (i think that's -22mm offset) and I already have 25x4.5-15 M/T front runners.... but my question is: will they rub the fenders?
I'm OK with them sticking out a little, but not OK with them rubbing, for obvious reasons.

P71 · 03-20-2008, 10:09 AM

A 225/40/18 will fit with no rubbing which is 25.1" tall, so height shouldn't be an issue. Shoot a PM to Josh (he's on the Top 25 list with the LS1 FC in OR) as he has a 245 or 255 up front with rolled fenders, so he might know more as far as the back-spacing or height right at the lip.

http://www.miata.net/garage/tirecalc.html

josh18_2k · 03-20-2008, 02:19 PM

according to an offset calculator, the outside of a 4" wheel with -22 offset sits almost the same as a mustang gt wheel (8", +30). so that sounds like a good fit.
unfortunately offset is not directly derivable from backspacing, since the 4" doesnt include the lip of the rim.
do you have stock suspension in front? if so, its a really close call (how far will it compress on the brakes?)

busted7 · 03-20-2008, 10:57 PM

The only skinnies i got to fit right is bogart 3.5'' with 3'' back space 15'' drag on flystar special order 4 lug. I also run the na brakes to clear the wheels.

AndreS · 03-21-2008, 03:56 AM

I've seen one FC running 2.25" BS and it looked great.

For suspension I have stock springs up front with KYB adjustable shocks. I'll likely be running the shocks set to full soft up front at the track.

I forgot to mention that I'll be running the NA brakes for clearance as well.

I think I'll pass on these for now & look for a little more backspace.

busted7 · 03-21-2008, 09:03 AM

Yha i tried the prostars with 1.75 bs and they hit the fenders so i had Rich Bogart make the wheels for me. Im running 12x15 Bogarts on the back with 29.5 10.5 w's slicks on the back with ford 9''. I need to finish this thing!!

03-20-2008, 04:12 AM	#1
AndreS The Newbie Join Date: Mar 2008 Location: Issaquah, WA Posts: 13 Rep Power: 0	front wheels/tires- will these fit? I found an OK deal on some centerline wheels, I just don't know if they will fit /o rubbing the fender. wheels are 15x4 with 1.625" backspace (i think that's -22mm offset) and I already have 25x4.5-15 M/T front runners.... but my question is: will they rub the fenders? I'm OK with them sticking out a little, but not OK with them rubbing, for obvious reasons.

03-20-2008, 10:09 AM	#2
P71 RCC Contributor Join Date: Feb 2008 Location: WA State Posts: 651 Rep Power: 18	A 225/40/18 will fit with no rubbing which is 25.1" tall, so height shouldn't be an issue. Shoot a PM to Josh (he's on the Top 25 list with the LS1 FC in OR) as he has a 245 or 255 up front with rolled fenders, so he might know more as far as the back-spacing or height right at the lip. http://www.miata.net/garage/tirecalc.html __________________ Michael Pinto 2008 PDXCGP Drag Racing Season Champion 83 RX-7 GSL; 12A/5-Speed, Red/Red; 100% Stock - 16.072@83.39 01 CV Police Interceptor; 4.6 SOHC V8/4R70W, Dk Blue/Grey; K&N FIPK/RP Oil/Optima/Superchips/Flowmaster 40's/2.5" cat-back - 14.854@92.37 Read my Rx-7 Build Thread! http://rotarycarclub.com/rotary_foru...ed=1#post70955 Get on the new RCC 1/4 Mile ET List! http://www.rotarycarclub.com/rotary_...read.php?t=368 Vote for the ROTM! http://rotarycarclub.com/rotary_foru...play.php?f=125

03-20-2008, 02:19 PM	#3
josh18_2k Rotary Fanatic Join Date: Feb 2008 Location: Gresham, OR Posts: 473 Rep Power: 18	according to an offset calculator, the outside of a 4" wheel with -22 offset sits almost the same as a mustang gt wheel (8", +30). so that sounds like a good fit. unfortunately offset is not directly derivable from backspacing, since the 4" doesnt include the lip of the rim. do you have stock suspension in front? if so, its a really close call (how far will it compress on the brakes?) __________________ Last edited by josh18_2k; 03-20-2008 at 02:27 PM.

03-20-2008, 10:57 PM	#4
busted7 Rotary Fan in Training Join Date: Mar 2008 Posts: 55 Rep Power: 18	The only skinnies i got to fit right is bogart 3.5'' with 3'' back space 15'' drag on flystar special order 4 lug. I also run the na brakes to clear the wheels.

03-21-2008, 03:56 AM	#5
AndreS The Newbie Join Date: Mar 2008 Location: Issaquah, WA Posts: 13 Rep Power: 0	I've seen one FC running 2.25" BS and it looked great. For suspension I have stock springs up front with KYB adjustable shocks. I'll likely be running the shocks set to full soft up front at the track. I forgot to mention that I'll be running the NA brakes for clearance as well. I think I'll pass on these for now & look for a little more backspace.

03-21-2008, 09:03 AM	#6
busted7 Rotary Fan in Training Join Date: Mar 2008 Posts: 55 Rep Power: 18	Yha i tried the prostars with 1.75 bs and they hit the fenders so i had Rich Bogart make the wheels for me. Im running 12x15 Bogarts on the back with 29.5 10.5 w's slicks on the back with ford 9''. I need to finish this thing!!