15 replies to this topic

[Threedoor]

Hey guys,

Planning on a 5 lug swap on my 84 flatty... how much room do we have (stock ride hight)?  I know that the offset is the same (18) on the  6 1/2 x 15 stock 4 lug wheels and the 8 x 16 front SHP 5 lug wheels... and the 215 wide tires on the stockers are almost as wide as the SHP front 225's... so will the front SHP's fit well in the front fender wells?

If yes, how wide a tire can I fit without any rubbing at stock ride hight?

Thanks,

Keith

PS:  I know SHP fronts will fit in back on a flatty, but what about regular rear deep dish 8" wheels in the rear on a flatty?  Do they stick out too much?  I am willing if needed to roll inner fender lip flat (front and rear) but I don't want to stretch or flare the fenders.

Edited by Threedoor, 19 January 2012 - 09:10 PM.

[D_Venable]

SHP 8 on the front will clear the fender, but iirc, it does not clear the strut.

Rear 8's will fit, it all really depends on the tire size. I didn't run widebody rears on mine, but what I did run was close in specs.  Rear 8's are -10mm offset. My Rota 16x8's, with the spacers I was running, gave me an offset of -15mm. Fender are rolled and pulled, and it's slammed on MR2 inserts in short housings with Cosmo springs. All on 205/50r16s

Edited by D_Venable, 20 January 2012 - 12:34 AM.

[D_Venable]

So today, I was over at speedyquest's, and he put rear 8's all around on his 5-lug converted flatty, with 225/50r16's at each corner.

The front rubbed the front lowest corner of the fender, a little roll and pull with a jack handle gave us JUST enough clearance.

enjoy

[speedyquest]

Woot Flatty love!!!

Allen

[Threedoor]

I'm now running the SHP fronts on my 84 with a hubcentric 10mm spacer giving me an overall offset of +6 instead of +16... they fit fantastic with my 225/50/16's!  No rubbing on either the strut side or the fender, no roll required    Without the spacer, there was no resistance to spinning the wheel with the car up on jackstands, but I could just barely hear the tire rubbing the spring perch.  With either a narrower tire, or coilovers with a smaller spring perch I could have run them without a spacer.

Now I just need to do the rears   

Keith

[pc85]

Just curious becuase I'm in the process of fitting my flatty with 17" rims and thinking of going with 225-45-17s. My question is if the stock offset of the SHP's is +18 mm and you have a 10 mm spacer, shouldn't the overall offset be +28 mm? How did you get +6 mm?

[D_Venable]

pc, it'll be +8mm with the 10mm spacer. He got +6 because he thought the offset of the stock wheel was +16.

You wouldn't get +28 because your not measuring the offset from the wheel's mounting surface anymore, your measuring from the hub. doing it this way gives you what the offset would be if you were running a wheel without spacers, but with the tire positioned the same relative to your fenders

Edited by D_Venable, 29 March 2012 - 06:07 PM.

[pc85]

Thanks D, the spacer thing always throws me off, but the 6 mm overall offset just didn't add up with an 18 mm stock. Good news is threedoor has 225-50-16s with no rubbing issues so 225-45-17s should fit no problem.

Edited by pc85, 30 March 2012 - 07:12 AM.

[Threedoor]

D_Venable, on 29 March 2012 - 06:06 PM, said:

pc, it'll be +8mm with the 10mm spacer. He got +6 because he thought the offset of the stock wheel was +16.

You wouldn't get +28 because your not measuring the offset from the wheel's mounting surface anymore, your measuring from the hub. doing it this way gives you what the offset would be if you were running a wheel without spacers, but with the tire positioned the same relative to your fenders

Yup, started out as a typo on my part (possibly even in a different thread) and I did my math based on the typo!  Thanks for the correction D_Venable

Keith

[Threedoor]

pc85, on 30 March 2012 - 07:05 AM, said:

Thanks D, the spacer thing always throws me off, but the 6 mm overall offset just didn't add up with an 18 mm stock. Good news is threedoor has 225-50-16s with no rubbing issues so 225-45-17s should fit no problem.

A 225/45/17 is almost 1/3 inch larger diameter than 225/50/16... that may put you into the spring perch.  The stock 215/60/15's are just a hair bigger around than your 17's, but the added width may put you rubbing.... there is very little clearance stock.  What offset and width 17's are you planning on?

Keith

[pc85]

Threedoor, on 01 April 2012 - 01:23 AM, said:

A 225/45/17 is almost 1/3 inch larger diameter than 225/50/16... that may put you into the spring perch.  The stock 215/60/15's are just a hair bigger around than your 17's, but the added width may put you rubbing.... there is very little clearance stock.  What offset and width 17's are you planning on?

Keith

225/50/16s are 24.9" diameter, 225/45/17s are 25" diameter. That's only .1" total diameter difference or just .05" closer to the spring perch than the 16s and the tread widths are both 8" so for all practical purposes they are pretty much exactly the same overall size. Anyway, I know that will be cutting it too close so I'm going to go with 215/45/17s and should be OK.

[Threedoor]

pc85, on 09 April 2012 - 08:02 PM, said:

225/50/16s are 24.9" diameter, 225/45/17s are 25" diameter. That's only .1" total diameter difference or just .05" closer to the spring perch than the 16s and the tread widths are both 8" so for all practical purposes they are pretty much exactly the same overall size. Anyway, I know that will be cutting it too close so I'm going to go with 215/45/17s and should be OK.

Just noticed this reply, haven't been keeping up with the board for a while due to prepping for construction of my new shop   225/50/16 is 24.86 and 225/45/17 is 24.97 inches, so yeah only .11 inches larger diameter, not .33  

The long and short of it is that pc85 is correct, with the same overall offset as I am now running a 225/45/17 should fit just as well as a 225/50/16.

Later,

Keith

[danmanTSI]

Do the 8in rears rub on a stock flatty suspension?

[speedyquest]

Ive personally not had issues with rubbing on the suspension with the setup pictured up top. Mine has a hub swap to the 5 lug but the suspension etc is still all flatty

Allen

[danmanTSI]

speedyquest, on 03 July 2012 - 07:00 PM, said:

Ive personally not had issues with rubbing on the suspension with the setup pictured up top. Mine has a hub swap to the 5 lug but the suspension etc is still all flatty

Allen

Thanks for the info, definitely good to know. I have one shp 8 I could put in the rear but regular 8s should work for now.

[speedyquest]

Keep in mind that shp 8's will have a different offset. I am currently running non shp 8 inch rears on all fours with 225/50/16's. No rubbing on the suspension but you will need to pull the fenders a bit probably.

Allen