Forgeline wheels back spacing for front

[70chally45]

Hows it going guys Im getting ready to order my wheels for my 70 challenger from forgeline and my front suspension Is all hotchkis with 2" drop spindles and wilwood brakes and I was wondering if anybody might know the back spacing I will need for the front wheels. Any info will be greatly appreciated.

Thanks

[jvike]

My Forgelines has 6.5" BS, but I have the XV suspension. You'll need to get mesurements for brakecaliper, spindle, hub diameter and so on. Look here: http://www.forgeline.com/wheel_fitment.php
You could email hotchkis and ask them for the specs on their E-Max Challenger, that car runs on Forgelines, or Forgeline might find that order in their achive.

[72bluNblu]

What size rims?

6.5" will be too much for a stock or drop spindle, you'll end up into the tie rods. I run 17x9's on my Challenger with 5" backspace and 275/40/17's, everything clears now with stock spindles and did before when I ran magnumforce drop spindles. I think I could get away with 5.25" of backspace, but no more than that before running into tie rod end clearance issues. If I remember right the Wilwood set up usually widens the track by about .25" per side, so, you can probably run that much more backspace than me with my 11.75" mopar disks.

But the rim diameter and width makes a big difference. 18's will clear the tie rod ends, so you can run more backspace. 15's will again have tie rod clearance issues with too much width or backspace, and clearing the upper ball joint can also be an issue. Don't think I've ever heard of anyone running anything wider than an 8" rim with 15's in the front, and usually 4.5 or 4.75" of backspace on those.

[70chally45]

What size rims?

6.5" will be too much for a stock or drop spindle, you'll end up into the tie rods. I run 17x9's on my Challenger with 5" backspace and 275/40/17's, everything clears now with stock spindles and did before when I ran magnumforce drop spindles. I think I could get away with 5.25" of backspace, but no more than that before running into tie rod end clearance issues. If I remember right the Wilwood set up usually widens the track by about .25" per side, so, you can probably run that much more backspace than me with my 11.75" mopar disks.

But the rim diameter and width makes a big difference. 18's will clear the tie rod ends, so you can run more backspace. 15's will again have tie rod clearance issues with too much width or backspace, and clearing the upper ball joint can also be an issue. Don't think I've ever heard of anyone running anything wider than an 8" rim with 15's in the front, and usually 4.5 or 4.75" of backspace on those.

Thank you very much for the info guys. On the front im gonna be running a 18x9 with 265/35/18 tire. What would you say would be the ideal BS for the front. I called hotchkis and they said that they dont give out bs info for what reason I dont know why. Im also runninf magnum force 2" drop spindles.
Much appreciated guys.

[70chally45]

Also on the rear my car is minitubbed to the frame. I want to run a 19x12 with a 325 tire on the rear with RMS street lynx. I was gonna go with a 5.5-5 3/4" back space on the rear. Think that will work?
Thanks

[cudazappa]

Thank you very much for the info guys. On the front I'm gonna be running a 18x9 with 265/35/18 tire. What would you say would be the ideal BS for the front. I called hotchkis and they said that they don't give out bs info for what reason I don't know why. I'm also running magnum force 2" drop spindles.
Much appreciated guys.

On my Challenger with stock suspension layout, I was running 17x9s with 275/40s with 5.0625" backspace.  A little more would've been better to avoid rubbing (5.25").  But rubbing was only an issue in a few extreme circumstance (essentially, only pulling into my parent's driveway, no lie)  With the dropped spindle I'm not sure where the outer tie rod would be in relation to the wheel, that's my concern with your setup.

[Travis72]

Also on the rear my car is minitubbed to the frame. I want to run a 19x12 with a 325 tire on the rear with RMS street lynx. I was gonna go with a 5.5-5 3/4" back space on the rear. Think that will work?
Thanks

No way.  You'll need a lot more backspacing than that.  I cut my rear end down a couple inches on both sides to center in the wheel tub and even with that I still run 6" of backspacing with an 18x12 rim.  With a stock width E-body rear end you'll need 7 or maybe even 8" of backspacing.  Take lots of measurements because each car is different.  If you can get a wheel rite or even better a wheel mount mate with an actual tire it will help a lot.

Travis
72 Cuda

[72bluNblu]

I run my 275/40/17's on a 17x9 with 5" of backspace and have no rubbing issues now that I've upped the camber a bit (-1*). I would say that 5.25" backspace for the 18x9's would probably be pretty close to ideal, will let you go a little lower before you worry about fender interference and should still keep you clear of the frame.

With drop spindles I don't think you'll clear the tie rods even with 18's, so, again you'll probably be limited by the tie rod clearance. My 17x9's with 5" BS worked with my magnumforce drop spindles, and with the stock ones on there now. With the Wilwood's I think you're looking at an extra 1/4" of track width, so that'd put you at 5.25". I think on my setup my max backspace on the 9" rim would be 5.25", and that might even depend on the rims manufacturer. So, assuming the Wilwoods really do add 1/4", I'd say you're looking at 5.25-5.5" of backspace up front with the Wilwoods and drop spindles. With stock spindles you could run more backspace, the frame would be the limiting factor then.

In the back you'll need WAY more backspace than that. To put the mounting surface in the middle of the rim on a 12" wide rim, you need 6" of backspace. If you didn't shorten the axle, I'd agree with Travis, you're probably going to need at least 7" of backspace.

[Raw Untamed]

70chally45, what did you decide to do?  Did you order them?  I'd like to hear what you found out.

Thanks,
Joe

[73restomod]

I have a B body rear, in my chally. Also have a 1 inch relocation kit from doctor diff. Factory wheel tubs, rolled the lip. I have a lot of room with a 10 x 18 rim. 1 1/8 to leaf spring, 1 5/8 to the lip. I could fit a 12 x 18 with plenty of room on the stock tubs. What prevents that is the factory style suspension. With a street-lynx it should be doable. I'm thinking you'd need at least 6 1/2 inches of BS.
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[moparman82]

just for the record, you need to be able to get ahold of the right guy at hotchkis, i called and emailed and nobody could give me the wheels specs from the e-max car, went to www.protouringmopar.com and one of the members is hotchkis' mopar guy, he can tell you everything you need to know about the e-max