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#426 |
69 Fleetside
![]() Join Date: Mar 2009
Location: Lake Stevens, WA
Posts: 333
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Hmmm 22's eh? I wonder how those would work with a 3/5 drop...wonder if it would rub with a 40 series tire while turning...
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#427 |
Registered User
Join Date: Mar 2004
Location: S.C. Kansas
Posts: 7
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
They just threw those tires in to try and sell me. What do you think would be a good size to run? I do have a 4/6 drop. I was actually looking at 255/50/18 and 285/45/20 (or 285/50/20).
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#428 | |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
but I don't like 18's and 20's. I would runs a 20x8.5 with a 255/40-20 and a 20x10 with a 295/40-20. A 50 series tire is too tall for a 4/6 drop. There will most like be issues with any 4/6 drop and a tire larger than 26" tall, rubbing on the inner fenders. (on large bumps in the road). 73-87 trucks will be worse due to the shape of the inner fenders.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 12-12-2009 at 11:02 AM. |
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#429 | |
motor exploder
Join Date: Mar 2009
Location: Pittsburgh, PA
Posts: 2,346
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
lolife is right on with the 40-series tire rec. for 20's.
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#430 |
Registered User
Join Date: Oct 2009
Location: Corbin Ky
Posts: 247
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Here is something you guy that are looking for tire can use:
Section Width Following the letter(s) that identify the type of vehicle and/or type of service for which the tire was designed, the three-digit numeric portion identifies the tire's "Section Width" (cross section) in millimeters. P225/50R16 91S The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel. This measurement is also referred to as the tire's section width. Because many people think of measurements in inches, the 225mm can be converted to inches by dividing the section width in millimeters by 25.4 (the number of millimeters per inch). 225mm / 25.4 = 8.86" Sidewall Aspect Ratio Typically following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio. P225/50R16 91S The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall. We know that this tire size's section width is 225mm and that its section height is 50% of 225mm. By converting the 225mm to inches (225 / 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". If this tire were a P225/70R16 size, our calculation would confirm that the size would result in a section height of 6.20", approximately a 1.8-inch taller sidewall. Just throwing it out there!
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#431 |
Registered User
Join Date: Nov 2009
Location: Ontario, Canada
Posts: 130
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
On my OBS 99 Im running 245/50/20 upfront and 255/50/20 out back on a 4/6. Like i posted earlier. I know there different clearance issues from the 67-72's and the 88-98's but. It is possible to run a 50 series tire on a 4 inch drop. I ran 255/50/20 up front for a while, it rubbed on larger bumps and dips but it still fit. I didnt want to rub at all so i went with smaller upfront.
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#432 | |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
I use Miata Tire Size Calculator. I'm not sure if it's 100% accurate,... but it's close. http://www.miata.net/garage/tirecalc.html
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#433 |
Registered User
Join Date: Jul 2000
Location: East Bay,CA
Posts: 298
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
ok,
I dont know if we covered this but i spoke with the vendor who quoted me and the guy claims to have these wheels on a 68 Pick up with a 5 lug conversion and that all he needed was 1/4 inch spacer in the front wheels on standard length lug studs, and no problems. Any thought son this? I personaly dont like that idea too much but it is a nice American made wheel for the $$
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#434 | |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
Maybe the '68 had 1" rotors. As far as I know this is the only solution (except machining the rotor) to make the old design work.
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#435 |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
My old rotor comparison pics.
I say buy a set and let us know how it turns out using the 1/4" spacers. Looks like you would need longer lug studs.
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#436 |
Registered User
Join Date: Oct 2009
Location: Corbin Ky
Posts: 247
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Where can a guy get these 1 inch rotors? Do you have any Part #'s for them?
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#437 | |
Amateur Rust Fighter
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
Keep in mind that the narrower rotors may require different calipers as well. Not sure about that.
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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; 12-15-2009 at 01:07 AM. |
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#438 |
*************
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Location: Pensacola, FL
Posts: 17,846
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
and spindles.....
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#439 |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Yep.
Requires 1" rotor, and compatible caliper, and spindle. If you are installing these on any truck other than a 73-87 (73-91 'burb),... you will need to swap ball joints and tie rod ends as well.
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#440 | |
Amateur Rust Fighter
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
![]() ![]() ![]() (Seriously, just wait a few weeks for the corrected wheels to come to market.)
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#441 | |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
I am rebuilding the entire front suspension on my '86 anyway,... so I just have to use the correct 1" rotor parts. Now if the wheels end up on my '69,... I will be swapping out a ton of good parts just to bolt them up. Ha,... and 5 months of "waiting just a few more weeks".
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 12-15-2009 at 02:32 AM. |
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#442 | |
Amateur Rust Fighter
Join Date: Sep 2007
Location: Mankato, MN
Posts: 1,087
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
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#443 | |
67-72 parts collector,…
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Location: Mid-MO
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
Diameter of the rotor is the same. Caliper will function the same. The real reason,... all four 20's for $700.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 12-15-2009 at 11:58 PM. |
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#444 |
Registered User
Join Date: Jul 2000
Location: East Bay,CA
Posts: 298
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
I Agree with lolife,
I imagine that the .250 thickness will make a minimal measurable downgrade to the braking efficiency. Hopefully the corrected hub will be available by the time i "need" the rims
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51 Chevy 3100 Deluxe Cab(SOLD) ![]() 65 **stang 6cyl 70 C10 Long Bed Fleetside(1st truck,thanks Dad![SOLD]) 72 C10 Short Bed Fleetside 73 Blazer 2WD Catalina Blue White Top(Needs Love) 73 Blazer 2WD Work in progress LT1/4L60E 83 Grand National (SOLD) 94 Blazer K1500 Silverado (SOLD) 96 Impala SS All original (NEXT IN LINE 2 B SOLD) 99 Tahoe 2DR, 2WD ![]() |
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#445 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
For a cruiser/lt.duty truck that doesn't see 'hard' life, the 1.00" rotor combo would be fine. If you tug a trailer around.... 1.25" rotors are better suited.
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#446 |
Registered User
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Location: dallas ga
Posts: 1,505
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
ok guys i have been told the new wheel is avail so I ordered them today...... was told I could return if they dont fit. I will post pics when they arrive
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#447 |
MY EX DRIVES A BROOM
Join Date: Nov 2003
Location: Herington, KS
Posts: 869
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
where'd you order from, is a group an option?
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#448 |
Registered User
Join Date: Dec 2008
Location: Gilbert , Az
Posts: 369
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
PT Barnum once said " there's a SUCKER born every minuite!.
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#449 | |
Registered User
Join Date: Oct 2009
Location: Corbin Ky
Posts: 247
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
Hope they fit.....
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#450 | |
67-72 parts collector,…
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Re: Got some new wheels: Boss 338's in 20x10 and 20x8.5
Quote:
Several sources are saying they are still weeks (if not months) away from being ready with the new design.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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