Are 33x12.50x15 to big for stock 72 1/2 4x4? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teeitup · 03-06-2008, 09:10 AM

Just like I asked above? Thanks Randy

**Stocker** · 03-06-2008, 09:43 AM

Anyone remember the old Armstrong TruTracs? I think they were 11.00-15 (just slightly smaller than 33-12.50), and I had them on 15x8 rims on my stock K20. Had a slight rub on the lower leading edge of the front fenders at full lock, so I took a hacksaw to the fenders. It's pretty well hidden and not noticable unless you're looking for it.

Based on that, I don't think those 33s will fit a K10 without a lift -- or some minor trimming.

Of course, wheel offset will change things too, and iirc (been a lotta years), those old 15x8 spoke wheels stuck out a bit further than my current 16.5x9.75 wheels...

**special-K** · 03-06-2008, 04:12 PM

Yes!!!First,there were only 11.00-15s and they were called Rhinos.Then,other sizes were made anf they became TruTracs.Later,the name changed to TruGripRVs.I used to run 14.50/37-15s.

Randy,I have 12.50/33s mounted on 9.75 rims on my`72 K2500 and they will rub lightly at certain few times.I put 8.25 wheels on and they still can rub(rarely).The front springs are very "settled" with good bit of negative arch(more than stock/less height).The blue & white one has about +2" spring work and 285/75-16s,for reference:

w/8.25" rims:

teeitup · 03-07-2008, 02:38 AM

Thanks guys, my 33's on my white 67 with 2 inch lift are on 8 inch ralleys, I put them on the 72 with no lift, no rubbing but can't decide if I like them or not, I may take my 31's off my blazer before I sell it and see how they look. The blazer may end up with the 33's on it when he comes and gets it. Both sets are like new. I just don't want to buy a new set of tires right now so I'm trading back and forth. Thanks Randy

griesel72 · 03-07-2008, 05:28 AM

randy

the yellow truck i got from joe has the 33's and ralley's, they don't rub at all, and really don't look all that big, the truck appears to have stock suspension

got any pictures of that new ride?

teeitup · 03-07-2008, 05:31 AM

Thanks David, these just look big on it to me. Maybe my sprins are sagging some. I'll get some pics this weekend of it when the wife isn't around. She still doesn't know its here.

griesel72 · 03-07-2008, 05:35 AM

Quote:

Originally Posted by teeitup

Thanks David, these just look big on it to me. Maybe my sprins are sagging some. I'll get some pics this weekend of it when the wife isn't around. She still doesn't know its here.

uh oh

BLAZERMAN · 03-07-2008, 06:02 AM

Randy, I've ran 33s on 8" rallys before with no trouble, did you put the 33" BFGs from my old Blazer on it?
I still have the front springs from the orange Blazer I got from you if you need them.

**88JRFAN** · 03-07-2008, 06:09 AM

DOES THE LITTLE MAN KNOW? IF SO, GOOD THING HE'S TO YOUNG TO RAT DAD OUT. I CAN HELP YOU DECIDE NEXT FRIDAY

. GOOD THING THE SHOP IS LONG ENOUGH FOR TWO GREAT TRUCKS. BE IN DOG HOUSE WHEN SHE FINDS OUT

. DAREN

wibilly · 03-07-2008, 07:25 AM

i would suspect 31" on a k10 would be safe and 33"on a k20

teeitup · 03-07-2008, 07:33 AM

David, she'll get over it. (Hopefully)

Rob, I was thinking they were 31's on the blazer but your right they are 33's.
Daren, Chipflyer (Jeff) is the only one thats seen it
Wibilly, I put the 33's on it. no rubbing so far
I guess it will just have to have 33's on it for now since thats all I got

Thanks Randy

dinotruck68 · 03-07-2008, 05:56 PM

kinda depends on how much ur springs sag... mydad had 72 1/2 ton a few years bak an fit 33x12.50 micky thompsons on 15x12 inch wheels and no rub at all... but he had the heavy duty spring option on his

westcoastflatbedder · 03-09-2008, 11:31 AM

32x11.50's Ive found work pretty slick,with no tire rubbing

**special-K** · 03-09-2008, 03:43 PM

My GMC 2500 sits lower than a stock K/10...for reference.

03-06-2008, 09:10 AM	#1
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Are 33x12.50x15 to big for stock 72 1/2 4x4? Just like I asked above? Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-06-2008, 09:43 AM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,811	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? Anyone remember the old Armstrong TruTracs? I think they were 11.00-15 (just slightly smaller than 33-12.50), and I had them on 15x8 rims on my stock K20. Had a slight rub on the lower leading edge of the front fenders at full lock, so I took a hacksaw to the fenders. It's pretty well hidden and not noticable unless you're looking for it. Based on that, I don't think those 33s will fit a K10 without a lift -- or some minor trimming. Of course, wheel offset will change things too, and iirc (been a lotta years), those old 15x8 spoke wheels stuck out a bit further than my current 16.5x9.75 wheels... __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 03-06-2008 at 09:45 AM.

03-06-2008, 04:12 PM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? Yes!!!First,there were only 11.00-15s and they were called Rhinos.Then,other sizes were made anf they became TruTracs.Later,the name changed to TruGripRVs.I used to run 14.50/37-15s. Randy,I have 12.50/33s mounted on 9.75 rims on my`72 K2500 and they will rub lightly at certain few times.I put 8.25 wheels on and they still can rub(rarely).The front springs are very "settled" with good bit of negative arch(more than stock/less height).The blue & white one has about +2" spring work and 285/75-16s,for reference: w/8.25" rims: __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 03-06-2008 at 04:16 PM.

03-07-2008, 02:38 AM	#4
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? Thanks guys, my 33's on my white 67 with 2 inch lift are on 8 inch ralleys, I put them on the 72 with no lift, no rubbing but can't decide if I like them or not, I may take my 31's off my blazer before I sell it and see how they look. The blazer may end up with the 33's on it when he comes and gets it. Both sets are like new. I just don't want to buy a new set of tires right now so I'm trading back and forth. Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-07-2008, 05:28 AM	#5
griesel72 Senior Member Join Date: Apr 2003 Location: Howard, Kansas USA Posts: 1,997	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? randy the yellow truck i got from joe has the 33's and ralley's, they don't rub at all, and really don't look all that big, the truck appears to have stock suspension got any pictures of that new ride? __________________ 1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife

03-07-2008, 05:31 AM	#6
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? Thanks David, these just look big on it to me. Maybe my sprins are sagging some. I'll get some pics this weekend of it when the wife isn't around. She still doesn't know its here. __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-07-2008, 06:02 AM	#8
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,828	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? Randy, I've ran 33s on 8" rallys before with no trouble, did you put the 33" BFGs from my old Blazer on it? I still have the front springs from the orange Blazer I got from you if you need them. __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

03-07-2008, 06:09 AM	#9
88JRFAN LET'S GO RACIN' Join Date: Oct 2007 Location: SALINA,KS Posts: 1,212	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? DOES THE LITTLE MAN KNOW? IF SO, GOOD THING HE'S TO YOUNG TO RAT DAD OUT. I CAN HELP YOU DECIDE NEXT FRIDAY. GOOD THING THE SHOP IS LONG ENOUGH FOR TWO GREAT TRUCKS. BE IN DOG HOUSE WHEN SHE FINDS OUT. DAREN __________________ Daren 04 Chevy Extend cab 2500HD 6.0 Liter 4x4 71 CHEVY 3/4 4X4 402 BB, th400/np205, dana44/eaton ho52 w/4:10-TOY Rip El Jay RIP BOBBO'S MOM

03-07-2008, 07:25 AM	#10
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? i would suspect 31" on a k10 would be safe and 33"on a k20 __________________ common sense isn't so common anymore

03-07-2008, 07:33 AM	#11
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? David, she'll get over it. (Hopefully) Rob, I was thinking they were 31's on the blazer but your right they are 33's. Daren, Chipflyer (Jeff) is the only one thats seen it Wibilly, I put the 33's on it. no rubbing so far I guess it will just have to have 33's on it for now since thats all I got Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-07-2008, 05:56 PM	#12
dinotruck68 Registered User Join Date: Jan 2008 Location: Alamo Posts: 104	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? kinda depends on how much ur springs sag... mydad had 72 1/2 ton a few years bak an fit 33x12.50 micky thompsons on 15x12 inch wheels and no rub at all... but he had the heavy duty spring option on his __________________

03-09-2008, 11:31 AM	#13
westcoastflatbedder Registered User Join Date: Oct 2005 Location: JAMESTOWN, TN Posts: 34	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? 32x11.50's Ive found work pretty slick,with no tire rubbing

03-09-2008, 03:43 PM	#14
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Are 33x12.50x15 to big for stock 72 1/2 4x4? My GMC 2500 sits lower than a stock K/10...for reference. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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