Tire size suggestions for 15x8 truck rallies - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FrankC · 04-19-2002, 08:31 PM

Any suggestions for this size wheel (manufacturer, size). I have 225x60's on there now, but think I need to go to 70's for better handling.

Thanks - Frank

Longhorn Man · 04-19-2002, 08:41 PM

A 70 series would be worse for handling...would help the ride, but not handling.
THe shorter the sidewall, the firmer the ride. Less rubber to flex and cusion the jolts. That also translates in quicker reaction times whan turning, and les tire roll to get in the way.
on your 225/60's, the sidewall is 60% the width of the tread...a 70 would be 70%, there for taller.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

69 longhorn · 04-19-2002, 09:28 PM

I run a 275/60/15 rear,on a 15x8 wheel....but prefer a 225/70 front on a 6 1/2 or 7" wheel. I feel that the 70 series tire handles better on the front. your 225/60s will have a rougher ride,& are pretty short for the truck. JMO....69longhorn.

O'l Buck · 04-20-2002, 12:19 AM

I've used 325/75 r15s and 31x10.5s, they both look nice, but I've always had 4x4s.

------------------
Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

Angel girl: 67 Cutlass convertible
330, 3spd stick

Greener: 90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

no name yet: 72 442 under serious construction

Project1970 · 04-20-2002, 02:37 AM

Is it lowered at all?

I've got 245/60-15s on the front of my '70, they're as wide/tall as I can go without lots of rubbing (and I still get some on the rare bump that doesn't bottom it out but is still huge) - 2.5" drop spindles, they're pushed out a bit thanks to the ECE disc conversion.

The rears are 275/60-15s. (Radial T/As all around). 4" drop, not even close to rubbing.

------------------
Project 1970 - soon to be seen at http://milhouse.treylis.org:81/

Brian19692 · 04-20-2002, 10:40 AM

I run 275/60-15 BFG T/A front and rear. I don't know how much it is lowered, I cut the coils about 10 years ago. They don't rub at all. I've never mesured the backspacing of the wheels but the look close to rallies.

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69 short box 4x4
72 long box
69 Camaro 327 4-speed
71 4x4 suburban, soon to be crew cab short box
87 S-10 V-8 FOR SALE
Des Moines, Iowa

Gordo · 04-20-2002, 10:47 AM

255/70R15 Firehawks for me,,,,they ride fine,,,,handle fine,,,,fill the hole and look good. I also have a 2+3 drop.

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1971 C10 swb stepside 350/700R4/3.73posi
Killingworth, Connecticut

1-PU70 · 04-20-2002, 07:28 PM

Goodyear HT 31". But I travel alot.

BobbyK · 04-21-2002, 10:53 AM

Here's mine.
15"x8" rallies with 15"x12.5"x33" rubber mounted on them.

------------------
"71"blazer,rust free(bought in Arizona),350SBC
(375HP),700R4,factory G.M. TPI.Living in Santa Barbara,California.Ongoing project.

slam33 · 04-21-2002, 11:09 AM

You need a balance between handling and ride. If it's a street truck your looking more towards ride, use the 70's. You have a 5000 lb truck, your not going to road race corvettes at Sebring. I run the 75's, real truck rubber. I want them to last and handle everything I throw at them. I have run 50/60 combo on one truck and it was ok but I used them up all the time and it was a hot rod anyway. If I want to race, I'll drag out the Manta

------------------
71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>

04-19-2002, 08:31 PM	#1
FrankC Registered User Join Date: Sep 2001 Location: Raleigh, NC USA Posts: 155	Tire size suggestions for 15x8 truck rallies Any suggestions for this size wheel (manufacturer, size). I have 225x60's on there now, but think I need to go to 70's for better handling. Thanks - Frank __________________ Thanks, Frank

04-19-2002, 09:28 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	I run a 275/60/15 rear,on a 15x8 wheel....but prefer a 225/70 front on a 6 1/2 or 7" wheel. I feel that the 70 series tire handles better on the front. your 225/60s will have a rougher ride,& are pretty short for the truck. JMO....69longhorn. __________________ http://community.webshots.com/user/hotrodhorn

04-20-2002, 12:19 AM	#4
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	I've used 325/75 r15s and 31x10.5s, they both look nice, but I've always had 4x4s. ------------------ Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s Angel girl: 67 Cutlass convertible 330, 3spd stick Greener: 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE no name yet: 72 442 under serious construction __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

04-20-2002, 02:37 AM	#5
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Is it lowered at all? I've got 245/60-15s on the front of my '70, they're as wide/tall as I can go without lots of rubbing (and I still get some on the rare bump that doesn't bottom it out but is still huge) - 2.5" drop spindles, they're pushed out a bit thanks to the ECE disc conversion. The rears are 275/60-15s. (Radial T/As all around). 4" drop, not even close to rubbing. ------------------ Project 1970 - soon to be seen at http://milhouse.treylis.org:81/ __________________ Project1970 - LS1 Swap Complete!

04-20-2002, 10:40 AM	#6
Brian19692 Registered User Join Date: Feb 2001 Location: Des Moines, IA. Posts: 188	I run 275/60-15 BFG T/A front and rear. I don't know how much it is lowered, I cut the coils about 10 years ago. They don't rub at all. I've never mesured the backspacing of the wheels but the look close to rallies. ------------------ 69 short box 4x4 72 long box 69 Camaro 327 4-speed 71 4x4 suburban, soon to be crew cab short box 87 S-10 V-8 FOR SALE Des Moines, Iowa __________________ 67 short 2wd. FOR SALE 69 long box w/72 grill 69 Camaro 327 4-speed Des Moines, Iowa

04-19-2002, 08:41 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	A 70 series would be worse for handling...would help the ride, but not handling. THe shorter the sidewall, the firmer the ride. Less rubber to flex and cusion the jolts. That also translates in quicker reaction times whan turning, and les tire roll to get in the way. on your 225/60's, the sidewall is 60% the width of the tread...a 70 would be 70%, there for taller. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

04-20-2002, 10:47 AM	#7
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	255/70R15 Firehawks for me,,,,they ride fine,,,,handle fine,,,,fill the hole and look good. I also have a 2+3 drop. ------------------ 1971 C10 swb stepside 350/700R4/3.73posi Killingworth, Connecticut __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

04-20-2002, 07:28 PM	#8
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Goodyear HT 31". But I travel alot. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

04-21-2002, 10:53 AM	#9
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,771	Here's mine. 15"x8" rallies with 15"x12.5"x33" rubber mounted on them. ------------------ "71"blazer,rust free(bought in Arizona),350SBC (375HP),700R4,factory G.M. TPI.Living in Santa Barbara,California.Ongoing project. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

04-21-2002, 11:09 AM	#10
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	You need a balance between handling and ride. If it's a street truck your looking more towards ride, use the 70's. You have a 5000 lb truck, your not going to road race corvettes at Sebring. I run the 75's, real truck rubber. I want them to last and handle everything I throw at them. I have run 50/60 combo on one truck and it was ok but I used them up all the time and it was a hot rod anyway. If I want to race, I'll drag out the Manta ------------------ 71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410 " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A> __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>



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