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#1 |
Amateur Rust Fighter
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
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Just ordered the Boss 338 wheels for my '72 shortbed stepside but am at a disadvantage when it comes to actually sizing up the proper tires because the chassis is in my garage but the bed is in another town in my buddy's body shop and therefore I can't measure as I would like. Hoping someone else with a similar stepside can tell me what they're running so I can get tires ordered before the truck is actually back together. The truck will have about a 4/6 static drop with leaf springs out back.
Here are the wheel specs: Front: 20x8.5, 20 mm offset, 5.239" backspacingRear I'm planning to run a 1" adapter (spacer) on the rear, effectively making the backspacing 5.225". I want the biggest tire I can fit out back without even a chance of rubbing. I had been thinking 295/35 or 295/40 but there don't seem to be many options in those sizes, and price is important. At about 3/4" narrower, would a 275/35 be too narrow on this rim? Front 95% sure I'm going 245/40 up front. Any reason not to? Thanks in advance for any advice! ![]() Brent
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Brent '72 Chevy SWB stepside - [ Build Thread ] '79 ChevMC SWB fleetside - [ Build Thread ] '64 Chevy SWB fleetside & '66 Chevy SWB stepside (waiting in the wings...) Last edited by brossow; 03-30-2010 at 12:33 PM. |
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#2 |
Resident Lurker
Join Date: Apr 2005
Location: Forney, TX
Posts: 205
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Re: Looking for tire size recommendations (and pics if ya got 'em)
brossow - I ordered a 338 staggered set of 20's for my '72 step also. I also want to run a 245/45f and 295/40r, but like you; I also have had a hard time finding a 295/40 for the rear. I don't have any advice other than I will let you know if/when I find a set since we want/have similar set ups.
Last edited by Boyd; 03-30-2010 at 05:35 PM. |
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#3 |
Life, Be In It.....
![]() Join Date: Oct 2003
Location: Novato, California
Posts: 1,498
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Re: Looking for tire size recommendations (and pics if ya got 'em)
I also have a step side and will be using the same wheels/sizes. I measured the wheel well at 11.5 inches and the 295 shows as 11.61 inches wide. So I think I will use a 285 40 20. I used this site to help determine tire height and width. I have not done alot of searching for this above mentioned tire size. I would like to know what you find out.
http://www.wallaceracing.com/tire-aspect-calc.php
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Project Name: LEMON DROP. Reconstruction started "December 2000". Projected completion date "Who knows" http://67-72chevytrucks.com/vboard/s...d.php?t=200082 |
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#4 |
Resident Lurker
Join Date: Apr 2005
Location: Forney, TX
Posts: 205
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Re: Looking for tire size recommendations (and pics if ya got 'em)
Here is another good site for tire size calculations. I like it because it will let you compare two different sizes at a time and it tells you the rotational differences.
http://www.miata.net/garage/tirecalc.html |
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#5 |
Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,162
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Re: Looking for tire size recommendations (and pics if ya got 'em)
I got 255-70x15 all the way around on my 72
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#6 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Looking for tire size recommendations (and pics if ya got 'em)
245/40 and 295/40.
Look at BFG's KDW's, Toyo Proxie II's, or Firestone Firehawks.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#7 | |
Tot Roddin'
Join Date: Apr 2005
Location: Mid-MO
Posts: 24,461
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Re: Looking for tire size recommendations (and pics if ya got 'em)
Quote:
![]() Only thing you will have to change from lolife's post is that the Toyo's are only available with a 255/40 not a 245/40; but that will also work on the front of your truck. Trying to find matching tires in a 245/40 or 255/40 and a 295/40 is getting more difficult each day. This is the prime tire setup IMO.
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-Nate ![]() 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 03-31-2010 at 02:21 PM. |
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#8 |
Resident Lurker
Join Date: Apr 2005
Location: Forney, TX
Posts: 205
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Re: Looking for tire size recommendations (and pics if ya got 'em)
Can only find a 295/40 in a Toyo Proxes II, but they do have a 295/45. It's sidewall is 1.2" taller, which is a good thing in my book. Adds a little "rake".
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#9 |
Tot Roddin'
Join Date: Apr 2005
Location: Mid-MO
Posts: 24,461
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Re: Looking for tire size recommendations (and pics if ya got 'em)
Boyd... I would compare some trucks that are running a 295/45 (big al) and a 295/40 (lolife99, n2trux, etc.) and see the difference, as it's pretty substantial.
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-Nate ![]() 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 04-01-2010 at 02:18 PM. |
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#10 |
Registered User
Join Date: Mar 2009
Location: norman okahoma
Posts: 269
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Re: Looking for tire size recommendations (and pics if ya got 'em)
falken 305/50r20 on a 10" wheel on the back and it clears the bed by 1/4" sorry dont remember front size backspacing about an inch less than yours.
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The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem ! Last edited by dougminton; 04-01-2010 at 03:19 PM. Reason: added backspacing info |
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#11 | |
Registered User
Join Date: Mar 2007
Location: Estevan, Sask, Canada
Posts: 185
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Re: Looking for tire size recommendations (and pics if ya got 'em)
I got these sizes in Toyo, about the only tire avaiable in these sizes.
Quote:
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1967 SWB C-10, BBC 454, T400, 3.73 posi, 20" Coys 1972 K5 Blazer, SBC 400, 4 spd, 3.73, 6" lift, 35" mud grapplers 2011 Sierra Denali HD, 6.6 L Duramax, RBP 96R rims, leveled and Nitto trail grapplers, ![]() 2009 Acura MDX |
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recommendations, stepside, tire size |
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