widest rear rims/tires with a stock stepside fender..ideas/pics? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

superchevy · 09-02-2003, 09:35 AM

I've decided not to mini-tub Project Daisycutter, but would like to get some ideas/pics from other stepside owners of how to cram as much meat under those stepside fenders as possible.
Anybody roll the fender lips in for an extra inch of clearance?
What size rims, backspacing are you guys running?
Thanks for the help, SC

chaptr2 · 09-02-2003, 10:40 AM

Here is a picture of my stepside with 15x10 rims in the rear. I have 275/60/15 tires without any clearance problems or having to roll my fenders.

chaptr2 · 09-02-2003, 10:45 AM

Here is another look at my wheels and tire.

nosto · 09-02-2003, 12:26 PM

superchevy -

255/45X20s on 20X8 rims, 4 1/2" backspace.
With this tire, I can tuck rim (wellll, real close). I have about 3/4" clearence to the bed side and 1/4" to the fender. With bags dumped and frame laying on the axle (about a 3" notch), I still have 1" space from tire to top of fender.
Yes, I pinched the fender just a little because when I only filled one rear air bag, it would catch on the other side. Now, no problems.

As chaptr2 shows, you can get a lot more tire under there if you stay stock or have a mild drop. Just depends where you're going with your project....

superchevy · 09-02-2003, 04:15 PM

Thanks for the info guys.
I've got a 6" drop in the rear.
I'm wondering if I measure very carefully, roll the fender lips, and get a custom offset/backspacing combo, if I can squeeze a 12" wide rim under there?
We'll see. SC

SCOTI · 09-02-2003, 04:38 PM

SC, why did you change your mind about the mini-tubs?

superchevy · 09-02-2003, 07:27 PM

Hey SCOTI. I'm going to keep the bed stock with a nice wood/stainless combo. Just hated to cut it up.
Are you going out to the Ballpark swapmeet this weekend?
Maybe I'll see you there.
SC

low 84 · 09-02-2003, 08:52 PM

i'm betting you won't be able to fit anything bigger than a 15x10 with like a 295 with out mini tubs.............not positive, but i haven't seen any truck with stock wheel wells tuck wider than a 295 without mods

SCOTI · 09-02-2003, 10:10 PM

Yep.... I'm going to try & make it. I also agree w/low84, 10" is max size w/o having to start cutting.

Slammed67 · 09-02-2003, 11:28 PM

I don't have a step side bed but from what I've heard from people who have them, an 8" wide wheel is about all you can fit with a decent tire. Like Nosto stated he only has about 1" total clearance. That's a pretty tight fit!

**Bowtie468** · 09-03-2003, 09:23 AM

superchevy, i'm running a 12" wheel in back, and will have to mini tub it. If the stock wheelwells were about 1" wider it would have made it.

Just noticed you've got a step bed. Not sure about the clearance there, i would have to say the same or maybe even a little less!

SCOTI · 09-03-2003, 09:42 AM

SC.... I've got a sawzall & I'm not scared.

oldtrucknut · 09-03-2003, 09:09 PM

Don't be scared, cut it... it's only metal.

15 X 14 w 33 X 19.5

superchevy · 09-03-2003, 09:49 PM

I'm not afraid to cut it, it just opens a can of worms if you do - cutting the bedsides, trimming the bedsills, trimming the wood and bedstrips to fit, etc - for just a couple of more inches of tire. I think maybe it's better to either go for full tubs like ProStreet, or just maximize what you've got stock. I'm not building a ProStreet truck, so I'm just going to work with what I have and squeeze the largest possible sum'***** in that wheelwell.
SC

*Randy70C-10* · 09-03-2003, 10:00 PM

chaptr2- Hope you don't mind me using this pic

I believe that you can use 12 inch rims with a 6 inch offset, but you'll have to get rid of these and you have to use mini tubs as well.

Blackhawkdc · 09-04-2003, 12:01 AM

I've got 285/70R15's on 15x10 rims. I don't know the back spacing though. I wish I could find a ncie 295/60 somewhere without spending alot of money. I've got BFG Radial T/A's right now. And unfortunately, I don't have a good pic of the rear tires right now. But the 285/70's are about perfect size for my truck and stance. Plus I've about got the tired worn down to some nice street drags.

HotRod929 · 09-04-2003, 12:06 AM

Blackhawkdc - Does anyone make a 295/60 tire...I have 295/50s on my truck now and they look a bit small.

HotRod

70c10 · 09-04-2003, 07:24 AM

I am also curious about dropping the rear of my truck 3-4 inches and getting the widest tire possible to fit. ttt

Blackhawkdc · 09-04-2003, 07:44 PM

BFgoodrich makes a 295/65R15 or a 315/60R15 in their Comp T/A Drag Radial tire. That's the only one I've found so far

mmathews · 05-29-2012, 08:21 AM

I am trying to do the same thing on my 70 stepside.I want the biggest wheel in the rear without cutting anything. The front i just want to run a 17 or 18 but do not know what back spacing should be. any suggestions.

**CC69Rat** · 05-29-2012, 08:40 AM

The first thing you want to find out is the width of your rear axle housing.

67-68 housing is more narrow than the later housing by .75" on either side. If you are looking at custom backspacing on your wheels you definitely want to know this before you order. Ex. 5" BS on one truck doesn't mean it will fit the same on another. .75" is huge when you're trying to tuck 20's + under your truck, bagged, etc. It can be a costly mistake.

68Stepbed · 05-29-2012, 12:33 PM

Wow, this is an old thread! Since it's here, though, 10" wide wheels is max with stock bedsides. I'm running a 17x9.5 wheel with 275/55/17 tires with a 5.75" rear drop. I currently have a 71-72 rear(wider) and the wheels have a 5.5" bs and they rubbed the inner bedside, so I have to run 7/16" spacers and they still slightly rub in hard cornering. So basically, with a 71-72 rearend, 5" backspacing is ideal.

I'm going to have to change my rear gear soon. I'm thinking of building a narrower 67-70 rearend and ordering new 17x9.5 rear wheels with the correct backspacing, which I have determined should be 4.25".

*Fitz* · 05-29-2012, 04:11 PM

Quote:

Originally Posted by superchevy

I've decided not to mini-tub Project Daisycutter, but would like to get some ideas/pics from other stepside owners of how to cram as much meat under those stepside fenders as possible.
Anybody roll the fender lips in for an extra inch of clearance?
What size rims, backspacing are you guys running?
Thanks for the help, SC

Some simple measurements that i used when adding tubs to my 67 stepside will help you work this out.
I started by removing the bump stops, then measured the distance from the wheel mounting surface to the frame and the distance from the frame to the inner flange on the fender. It also helps to know rhe distance from the bed si

David67 · 05-29-2012, 04:37 PM

Quote:

Originally Posted by 68Stepbed

Wow, this is an old thread! Since it's here, though, 10" wide wheels is max with stock bedsides. I'm running a 17x9.5 wheel with 275/55/17 tires with a 5.75" rear drop. I currently have a 71-72 rear(wider) and the wheels have a 5.5" bs and they rubbed the inner bedside, so I have to run 7/16" spacers and they still slightly rub in hard cornering. So basically, with a 71-72 rearend, 5" backspacing is ideal.

I'm going to have to change my rear gear soon. I'm thinking of building a narrower 67-70 rearend and ordering new 17x9.5 rear wheels with the correct backspacing, which I have determined should be 4.25".

lol 9 year old thread.....ehh why not. I'm running a similar setup to 68Stepbed. I'm running a 17x8 wheel also with 275/55/17 with a 6" rear drop on my stepside. I have the narrower '67 rear and my wheels have 4" bs with about an inch of clearance between rubber and inner bedside. Everything fits very nicely but I'm thinking about going with a wider wheel with the same bs as well as a wider tire because I could still come out a little more.

barry h. · 05-29-2012, 05:00 PM

oldtrucknut truck looks nice from rear,got any side view pics

09-02-2003, 09:35 AM	#1
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	widest rear rims/tires with a stock stepside fender..ideas/pics? I've decided not to mini-tub Project Daisycutter, but would like to get some ideas/pics from other stepside owners of how to cram as much meat under those stepside fenders as possible. Anybody roll the fender lips in for an extra inch of clearance? What size rims, backspacing are you guys running? Thanks for the help, SC __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

09-02-2003, 10:40 AM	#2
chaptr2 Registered User Join Date: Mar 2000 Location: Olalla, WA Posts: 705	Here is a picture of my stepside with 15x10 rims in the rear. I have 275/60/15 tires without any clearance problems or having to roll my fenders. Attached Images __________________ This is only my opinion and it is subject to change. 70 GMC Short box stepside Blown 388 Stroker 72 K/5 Blazer 350/SM465/205

09-02-2003, 10:45 AM	#3
chaptr2 Registered User Join Date: Mar 2000 Location: Olalla, WA Posts: 705	Here is another look at my wheels and tire. Attached Images __________________ This is only my opinion and it is subject to change. 70 GMC Short box stepside Blown 388 Stroker 72 K/5 Blazer 350/SM465/205

09-02-2003, 12:26 PM	#4
nosto Flamin' Bass Join Date: Aug 2001 Location: Galloway, NJ, US Posts: 315	superchevy - 255/45X20s on 20X8 rims, 4 1/2" backspace. With this tire, I can tuck rim (wellll, real close). I have about 3/4" clearence to the bed side and 1/4" to the fender. With bags dumped and frame laying on the axle (about a 3" notch), I still have 1" space from tire to top of fender. Yes, I pinched the fender just a little because when I only filled one rear air bag, it would catch on the other side. Now, no problems. As chaptr2 shows, you can get a lot more tire under there if you stay stock or have a mild drop. Just depends where you're going with your project.... Attached Images __________________ Rick Olson /nosto/ Galloway, NJ Pics : http://community.webshots.com/user/nosto53 1972 Triumph TR6 - full resto, now with a Toyota 5-speed 1975 F**D F-100 - rusty, but reliable 1982 HD XLH-1000 1967 C-10, shortstep, 350/M21 4spd, nitrogen tank fills fast bags on 4 corners, Toyo 255/45X20s on American Eagle 221 20X8s, shaved locks and handles, antenna, fuel filler, tiny C-notch, rear fuel tank, long headers, Edelbrock, worn 600 Holley, Checkmate flush hard cover, rear pan, custom LED taillights - painted it, too! But don't like it so I'm gonna do it again!!

09-02-2003, 04:15 PM	#5
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Thanks for the info guys. I've got a 6" drop in the rear. I'm wondering if I measure very carefully, roll the fender lips, and get a custom offset/backspacing combo, if I can squeeze a 12" wide rim under there? We'll see. SC __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

09-02-2003, 04:38 PM	#6
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	SC, why did you change your mind about the mini-tubs? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

09-02-2003, 07:27 PM	#7
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Hey SCOTI. I'm going to keep the bed stock with a nice wood/stainless combo. Just hated to cut it up. Are you going out to the Ballpark swapmeet this weekend? Maybe I'll see you there. SC __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

09-02-2003, 08:52 PM	#8
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	i'm betting you won't be able to fit anything bigger than a 15x10 with like a 295 with out mini tubs.............not positive, but i haven't seen any truck with stock wheel wells tuck wider than a 295 without mods __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

09-02-2003, 10:10 PM	#9
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	Yep.... I'm going to try & make it. I also agree w/low84, 10" is max size w/o having to start cutting. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

09-02-2003, 11:28 PM	#10
Slammed67 Progress = 0% Join Date: Nov 2001 Location: Kansas City, MO Posts: 2,108	I don't have a step side bed but from what I've heard from people who have them, an 8" wide wheel is about all you can fit with a decent tire. Like Nosto stated he only has about 1" total clearance. That's a pretty tight fit! __________________ Jason - '67 GMC swb \| '57 Bel-Air 4dr hardtop \| '56 210 4dr Wagon \| 2000 GMC Sierra

09-03-2003, 09:23 AM	#11
Bowtie468 Senior Member Join Date: Jun 2002 Location: Cecilia, Louisiana Posts: 1,638	superchevy, i'm running a 12" wheel in back, and will have to mini tub it. If the stock wheelwells were about 1" wider it would have made it. Just noticed you've got a step bed. Not sure about the clearance there, i would have to say the same or maybe even a little less! __________________ Chris click here to see my buildpage http://67-72chevytrucks.com/vboard/s...d.php?t=394656 ---------------------------------- 1979 C10 Silverado Big10 SWB Factory 454/400 Cardinal Red/Santa Fe Tan (original paint) 1969 Camaro X44 LS swap 1968 C10 SWB Fleetside (SOLD) 468BBC MultiPort TPI / Dynamic EFI P4 Black/Black 1963 Nova SS convertible (SOLD) 194 I6/ PowerGlide Last edited by Bowtie468; 09-03-2003 at 09:30 AM.

09-03-2003, 09:42 AM	#12
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	SC.... I've got a sawzall & I'm not scared. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

09-03-2003, 09:09 PM	#13
oldtrucknut 67-72 truck surgeon Join Date: Jul 2003 Location: Indiana Posts: 155	Don't be scared, cut it... it's only metal. 15 X 14 w 33 X 19.5 Attached Images __________________ 1969 Chevy C10 1993 Toyota Camry LE 1999 Ford F250 Super Duty 4x4 diesel 2008 Dodge Charger Super Bee 1953 International R182

09-03-2003, 09:49 PM	#14
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	I'm not afraid to cut it, it just opens a can of worms if you do - cutting the bedsides, trimming the bedsills, trimming the wood and bedstrips to fit, etc - for just a couple of more inches of tire. I think maybe it's better to either go for full tubs like ProStreet, or just maximize what you've got stock. I'm not building a ProStreet truck, so I'm just going to work with what I have and squeeze the largest possible sum'***** in that wheelwell. SC

09-03-2003, 10:00 PM	#15
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	chaptr2- Hope you don't mind me using this pic I believe that you can use 12 inch rims with a 6 inch offset, but you'll have to get rid of these and you have to use mini tubs as well.



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09-04-2003, 12:01 AM	#16
Blackhawkdc 440 american Horses Join Date: Mar 2001 Location: Anoka, MN USA Posts: 470	I've got 285/70R15's on 15x10 rims. I don't know the back spacing though. I wish I could find a ncie 295/60 somewhere without spending alot of money. I've got BFG Radial T/A's right now. And unfortunately, I don't have a good pic of the rear tires right now. But the 285/70's are about perfect size for my truck and stance. Plus I've about got the tired worn down to some nice street drags. __________________ Seth Petro 1969 Chev Short Step 425hp 350, TH400, big tires, fast truck 1979 Pontiac Trans Am 1991 Saturn SL1 - gas mileage! (and free) 1977 Buick LeSabre - for sale May America bless God, and may God bless America

09-04-2003, 12:06 AM	#17
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	Blackhawkdc - Does anyone make a 295/60 tire...I have 295/50s on my truck now and they look a bit small. HotRod Attached Images __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

09-04-2003, 07:24 AM	#18
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	I am also curious about dropping the rear of my truck 3-4 inches and getting the widest tire possible to fit. ttt __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

09-04-2003, 07:44 PM	#19
Blackhawkdc 440 american Horses Join Date: Mar 2001 Location: Anoka, MN USA Posts: 470	BFgoodrich makes a 295/65R15 or a 315/60R15 in their Comp T/A Drag Radial tire. That's the only one I've found so far __________________ Seth Petro 1969 Chev Short Step 425hp 350, TH400, big tires, fast truck 1979 Pontiac Trans Am 1991 Saturn SL1 - gas mileage! (and free) 1977 Buick LeSabre - for sale May America bless God, and may God bless America

05-29-2012, 08:21 AM	#20
mmathews Registered User Join Date: May 2012 Location: columbus ohio Posts: 1	Re: widest rear rims/tires with a stock stepside fender..ideas/pics? I am trying to do the same thing on my 70 stepside.I want the biggest wheel in the rear without cutting anything. The front i just want to run a 17 or 18 but do not know what back spacing should be. any suggestions. Attached Images

05-29-2012, 08:40 AM	#21
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,206	Re: widest rear rims/tires with a stock stepside fender..ideas/pics? The first thing you want to find out is the width of your rear axle housing. 67-68 housing is more narrow than the later housing by .75" on either side. If you are looking at custom backspacing on your wheels you definitely want to know this before you order. Ex. 5" BS on one truck doesn't mean it will fit the same on another. .75" is huge when you're trying to tuck 20's + under your truck, bagged, etc. It can be a costly mistake. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

05-29-2012, 12:33 PM	#22
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: widest rear rims/tires with a stock stepside fender..ideas/pics? Wow, this is an old thread! Since it's here, though, 10" wide wheels is max with stock bedsides. I'm running a 17x9.5 wheel with 275/55/17 tires with a 5.75" rear drop. I currently have a 71-72 rear(wider) and the wheels have a 5.5" bs and they rubbed the inner bedside, so I have to run 7/16" spacers and they still slightly rub in hard cornering. So basically, with a 71-72 rearend, 5" backspacing is ideal. I'm going to have to change my rear gear soon. I'm thinking of building a narrower 67-70 rearend and ordering new 17x9.5 rear wheels with the correct backspacing, which I have determined should be 4.25". __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

05-29-2012, 05:00 PM	#25
barry h. Registered User Join Date: Jul 2010 Location: Arlington,Tx Posts: 103	Re: widest rear rims/tires with a stock stepside fender..ideas/pics? oldtrucknut truck looks nice from rear,got any side view pics

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