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tire rim backspacing...

875 Views 8 Replies 7 Participants Last post by  cummins freak
Ive been on here trying to figure this out for about 5 hours now. Im looking at getting the cragar black steel rims and some trxus mts 33x12.5. I have a 2001 2500 CTD. Ive heard that the steel rims will not rub on the brake calipers...Does anyone know if this is true or not? Also i would like my tires to stick about 1.5- 2.5 inches out of the fender what backspacing would put me in that area with 12.5 tires and 16 or 15x8 rims? I would like to run the 15inch rims if possible i just do not want them to rub and dont feel like grinding my calipers down.
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On 2005-11-30 21:28, southpawslingr13 wrote:
Ive been on here trying to figure this out for about 5 hours now. Im looking at getting the cragar black steel rims and some trxus mts 33x12.5. I have a 2001 2500 CTD. Ive heard that the steel rims will not rub on the brake calipers...Does anyone know if this is true or not? Also i would like my tires to stick about 1.5- 2.5 inches out of the fender what backspacing would put me in that area with 12.5 tires and 16 or 15x8 rims? I would like to run the 15inch rims if possible i just do not want them to rub and dont feel like grinding my calipers down.

there is no way they will fit... a 16.5" aluminum rim was a tight fit on mine. i dont think they will even clear the drums
:withstupid: The rear drums are HUGE :shock:
so are you saying that a 16" rim wont fit or the 15 because dont the trucks come with 16x8 rims factory and not to steel this thred but will 16" steel rims fit my 97 then if they dont fit his
My steel rims on my 2500 are 16" and from what I've learned, the backspacing is a bit over 6" on stock rims. I just ordered some 17x9 rims that come with 4.5" of backspacing. I think most aftermarket rims for the 2500 run between 3.75 and 5" of backspacing. You can order some Mickey Thompson's with 6" of backspacing & the H2 rims also have 6". But, the Mickey Thompsons run major $$ (like $350) a piece. I don't think you could fit a 15" rim as I've heard clearance issues, but haven't verified this myself.
HTH
a steel 16 should fit but, i don't think that an alloy 16 will
the second gen from 94-98 and some 99s come from factory with 16x6.5 steel rims, some call them 7" wide, but are actually only 6.5, the 2nd gen allum alloy are 16x8 but have different backspacing then the steel rims and will not fit the back drums of the 94-98 2nd gens without grinding down your drums 1/8 of a inch or so. also some guys have had issues with the allum. alloys rubbing on TREs up front. 3rd gen 17s will fit on all 2nd gens and are 17x8, steel or allum.,NOW, your factory offset is somewheres like 5-6. most of your aftermarket come with a maximum of 4.5, but they do vary,a 16x 8 aftermarket should have around 3.5, and will stickout enough for what your lookin for,but if you put on a factory 16x8 on, it wont stick out as far, backspacing and offset are 2 different things also, keep that in mind.....................AND GET THAT PART ABOUT FITTING SOME 15s ON THERE OUT OF YOUR HEAD RIGHT NOW< IT WONT WORK!! I KNOW THERE ARE 8 BOLT 15s BUT THEY WERE FOR THE OLDER FORDS AND CHEVYS and very hard to find anymore.
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shawn now my dad has a 2001 with drum brakes in back not disk and his truck has the alum. 16x8's how does that work are they different drums then the 94-99

ps, he has a 2500 ctd 4x4 long bed ext cab
anybody
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