From owner-fsj-digest-at-digest.net Mon Jun 20 20:26:09 2011 From: fsj-digest fsj-digest Tuesday, June 21 2011 Volume 01 : Number 3730 Forum for Discussion of Full Sized SJ Series Jeeps Brian Colucci Digest Coordinator Contents: Re: fsj: Re: xj: tire size fsj: tires - J10 RE: fsj: tires - J10 RE: fsj: tires - J10 RE: fsj: tires - J10 RE: fsj: tires - J10 Re: fsj: tires - J10 FSJ Digest Home Page: http://www.digest.net/jeeps/fsj/ Send submissions to fsj-digest-at-digest.net Send administrative requests to fsj-digest-request-at-digest.net To unsubscribe, include the word unsubscribe by itself in the body of the message, unless you are sending the request from a different address than the one that appears on the list. Include the word help in a message to fsj-digest-request to get a list of other majordomo commands. ---------------------------------------------------------------------- Date: Mon, 20 Jun 2011 15:02:50 -0700 (PDT) From: john Subject: Re: fsj: Re: xj: tire size yeah, thinking I might just put 15" rims back on it... ;) my son has the right set on his '85 GW... nice BFG AT KOs too... hmmm... sad part is he'd notice if I swapped tires/rims... but he may be selling it, so before he does... :) john ----- - ------------------------------------------------------------------------ -o|||||o- Snohomish, Washington - where Jeeps don't rust, they mold http://AMSOIL.com/redirect.cgi?zo=283461 http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us - ------------------------------------------------------------------------ On Mon, 20 Jun 2011, Dan Black wrote: # Well, there are ways to calculate it... but of course it's weird. # (And I don't know it well enough to look it up and figure it out right # now.) # # But I know your "28.88 inches" doesn't need to be that precise, # because different brands/models of tires that claim to be exactly the # same size will actually have diameters that can vary easily an inch, # maybe even two. Not as precise as you might expect. # # # On Mon, Jun 20, 2011 at 16:04, john wrote: # > the ONE piece of information I needed... overall diameter... isn't to be # seen either. # > # > the od of a 235/75r15, which I'm pretty sure is the stock size for a J10, is # 28.88 inches. # > a 30x9.5 is 29.8, 31x10.5 is 30.? # > # > I believe it has 265/70 R16s on it now... it's 10 mph off or so, # specifically there is a 9.05% error. # > # > john # > # > ----- # > ------------------------------------------------------------------------ # > -o|||||o- # > Snohomish, Washington - where Jeeps don't rust, they mold # > http://AMSOIL.com/redirect.cgi?zo=283461 # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us # > ------------------------------------------------------------------------ # > # > # > On Mon, 20 Jun 2011, Tom Moulder wrote: # > # > # This looked much prettier when I wrote it.... # > # # > # # > # # > # On 6/20/2011 3:50 PM, Tom Moulder wrote: # > # > A 235/70R16 is virtually the same size with a bigger hole in the # middle # > # > (Specs for a BFG All--Terrain T/A KO) # > # > # > # > *Size* # > # > Service Description # > # > # > # > Load Range # > # > # UTQG # > # > Max # > # > Load # Max. # > # > Inflation # > # > Press. # > # > # Tread # > # > Depth # Tire # > # > Weight Rim # > # > Width # > # > Range # > # > Meas. # > # > Rim # > # > Width # > # > Sect. # > # > Width # > # > Tread # > # > Width # > # > Overall # > # > Diam. # Revs # > # > Per # > # > Mile # > # > Country # > # > of # Origin* # > # > # > # > # > # > # > # > *235/75R15* # > # > *Load Index 104* = 1984lbs (900kg) per tire # > # > *Load Index 101* = 1819lbs ( 825kg) per tire # > # > *Speed Rating "S"* = 112mph (180kph) 104/101S # > # > # # > # > C Not required for # > # > this tire.None # > # > # # > # > 1985 lbs. # > # > 50 psi # > # > 16/32" # > # > 36 lbs. 6-7" # > # > 6.5" # > # > 9.1" # > # > 7.6" # > # > 29" # > # > 717 # > # > *Country of Origin "US" *= UNITED STATES OF AMERICAUS # > # > # # > # > # > # > # > # > # > # > # > # > # > # > *235/70R16* # > # > *Load Index 104* = 1984lbs (900kg) per tire # > # > *Load Index 101* = 1819lbs ( 825kg) per tire # > # > *Speed Rating "S"* = 112mph (180kph) 104/101S # > # > # # > # > C Not required for # > # > this tire.None # > # > # # > # > 1985 lbs. # > # > 50 psi # > # > 16/32" # > # > 38 lbs. 6-7.5" # > # > 7" # > # > 9.5" # > # > 7.7" # > # > 29.1" # > # > 715 # > # > *Country of Origin "US" *= UNITED STATES OF AMERICAUS # > # > # # > # > # > # > # > # > # > # > # > # > # > # > On 6/20/2011 3:23 PM, john wrote: # > # >> The j10 has 2.72 gears, and at least 2x's the tire size meaning even # lower gearing. Kills in town mileage and power. Going back to stock od will # help. Not rubbing, j10s can take big tires w/o lifts. # > # >> # > # >> If anything I may go -size. Cheaper than gears. :) # > # >> # > # >> Thanx # > # >> *** john at http://wagoneers.com *** # > # >> # > # >> -----Original Message----- # > # >> From: Tom Moulder # > # >> Sender: owner-xj-at-digest.net # > # >> Date: Mon, 20 Jun 2011 15:18:25 # > # >> To: # > # >> Reply-To: xj-at-digest.netSubject: Re: xj: tire size # > # >> # > # >> Try TireRack.com. Put in the 235/75r15 size and state you want a # > # >> PlusOne. Not sure how they could be too large if they are on the # > # >> vehicle.... do they rub? Maybe you need new springs or a lift. # > # >> # > # >> # > # >> # > # >> On 6/20/2011 2:04 PM, john wrote: # > # >>> anyone know what the equivalent size for a 235/75r15 is in a 16" # rim? # > # >>> # > # >>> the PO put 16" rims on my '83 J10... # > # >>> # > # >>> and the tires are too large... # > # >>> # > # >>> anyone interested in trading for stock J10 rims with comparable tread # of the correct size? # > # >>> # > # >>> # > # >>> thanx, # > # >>> john # > # >>> # > # >>> # > # >>> # > # >>> # > # >>> ----- # > # >>> # ------------------------------------------------------------------------ # > # >>> -o|||||o- # > # >>> Snohomish, Washington - where Jeeps don't rust, they mold # > # >>> http://AMSOIL.com/redirect.cgi?zo=283461 # > # >>> http://JohnMeister.com HTTP://WAGONEERS.COM # http://fotomeister.us # > # >>> # ------------------------------------------------------------------------ # > # >>> # > # # > # # ------------------------------ Date: Mon, 20 Jun 2011 16:00:31 -0700 (PDT) From: john Subject: fsj: tires - J10 the '83 J10 is supposed to have: 225/75/15. it has 265/70/16's supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error (calculated 9.x %...) if I stay with 16" rims I could run a 205/75/16 to be 0.6% too fast... :) if I go smaller I will increase my gear ratio which will be better in town, but I'm concerned about going too small... smaller tires will also bear less weight... 2.72 gears really stink, unless you're trying to set a land speed record or something... not sure what Jeep was thinking using these ratios. sure it's only turning about 1900 rpm at 60mph.. but getting to 60mph requires a small oil tanker and a sundial... :) john ----- - ------------------------------------------------------------------------ -o|||||o- Snohomish, Washington - where Jeeps don't rust, they mold http://AMSOIL.com/redirect.cgi?zo=283461 http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us - ------------------------------------------------------------------------ ------------------------------ Date: Mon, 20 Jun 2011 19:46:08 -0700 From: Jim Blair Subject: RE: fsj: tires - J10 If you tires are still good, I'd swap to 3.31 gears. That will give you the equivalent to 3.08 with stock tires. Your current setup (if you have 2.72 gears) 30.6" vs 28.3" means it has 2.52 ratio equivalent. AMC usually ran 3.08 in the FSJs with V8 before '80, so 3.31 would be a good match and could even allow for an O/D later. I had 2.37 in my Eagle and it was a total slug except on the highway when I needed to pass. Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > Date: Mon, 20 Jun 2011 16:00:31 -0700 > From: john-at-wagoneers.com > To: fsj-at-digest.net; xj-at-digest.net > Subject: fsj: tires - J10 > > the '83 J10 is supposed to have: 225/75/15. > > it has 265/70/16's > > supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error (calculated 9.x %...) > > if I stay with 16" rims I could run a 205/75/16 to be 0.6% too fast... :) > > if I go smaller I will increase my gear ratio which will be better in town, but I'm concerned about > going too small... smaller tires will also bear less weight... 2.72 gears really stink, unless > you're trying to set a land speed record or something... not sure what Jeep was thinking using these ratios. > sure it's only turning about 1900 rpm at 60mph.. but getting to 60mph requires a small oil tanker and a sundial... :) > > john > > > ----- > ------------------------------------------------------------------------ > -o|||||o- > Snohomish, Washington - where Jeeps don't rust, they mold > http://AMSOIL.com/redirect.cgi?zo=283461 > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us > ------------------------------------------------------------------------ ------------------------------ Date: Mon, 20 Jun 2011 19:49:35 -0700 (PDT) From: john Subject: RE: fsj: tires - J10 really don't have money for tires or gears right now... :) the tires have lots of tread... they're really likely good for the highway, but not so good for use in my yard... of course I have them pumped to max pressure for the run up from vancouver. :) I'd love to put 3.31s or 3.54 in this truck and 235s... would work nicer... but I'm not keeping this one, and superdawg has 3.54s with 235s, the same setup as the scout Turbo Diesels that were rated at 20/24 mpg. :) john ----- - ------------------------------------------------------------------------ -o|||||o- Snohomish, Washington - where Jeeps don't rust, they mold http://AMSOIL.com/redirect.cgi?zo=283461 http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us - ------------------------------------------------------------------------ On Mon, 20 Jun 2011, Jim Blair wrote: # # If you tires are still good, I'd swap to 3.31 gears. That will give you the equivalent to 3.08 with stock tires. Your current setup (if you have 2.72 gears) 30.6" vs 28.3" means it has 2.52 ratio equivalent. AMC usually ran 3.08 in the FSJs with V8 before '80, so 3.31 would be a good match and could even allow for an O/D later. I had 2.37 in my Eagle and it was a total slug except on the highway when I needed to pass. # # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 # # # > Date: Mon, 20 Jun 2011 16:00:31 -0700 # > From: john-at-wagoneers.com # > To: fsj-at-digest.net; xj-at-digest.net # > Subject: fsj: tires - J10 # > # > the '83 J10 is supposed to have: 225/75/15. # > # > it has 265/70/16's # > # > supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error (calculated 9.x %...) # > # > if I stay with 16" rims I could run a 205/75/16 to be 0.6% too fast... :) # > # > if I go smaller I will increase my gear ratio which will be better in town, but I'm concerned about # > going too small... smaller tires will also bear less weight... 2.72 gears really stink, unless # > you're trying to set a land speed record or something... not sure what Jeep was thinking using these ratios. # > sure it's only turning about 1900 rpm at 60mph.. but getting to 60mph requires a small oil tanker and a sundial... :) # > # > john # > # > # > ----- # > ------------------------------------------------------------------------ # > -o|||||o- # > Snohomish, Washington - where Jeeps don't rust, they mold # > http://AMSOIL.com/redirect.cgi?zo=283461 # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us # > ------------------------------------------------------------------------ # ------------------------------ Date: Mon, 20 Jun 2011 20:03:36 -0700 From: Jim Blair Subject: RE: fsj: tires - J10 3.54 with the V8 should only be run with 33" tires or O/D Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > Date: Mon, 20 Jun 2011 19:49:35 -0700 > From: john-at-wagoneers.com > To: carnuck-at-hotmail.com > CC: fsj-at-digest.net; xj-at-digest.net > Subject: RE: fsj: tires - J10 > > really don't have money for tires or gears right now... :) > > the tires have lots of tread... they're really likely good for the highway, but not > so good for use in my yard... of course I have them pumped to max pressure for the run up > from vancouver. :) > > I'd love to put 3.31s or 3.54 in this truck and 235s... would work nicer... but I'm not keeping this > one, and superdawg has 3.54s with 235s, the same setup as the scout Turbo Diesels that were > rated at 20/24 mpg. :) > > john > > > > ----- > ------------------------------------------------------------------------ > -o|||||o- > Snohomish, Washington - where Jeeps don't rust, they mold > http://AMSOIL.com/redirect.cgi?zo=283461 > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us > ------------------------------------------------------------------------ > > > On Mon, 20 Jun 2011, Jim Blair wrote: > > # > # If you tires are still good, I'd swap to 3.31 gears. That will give you the equivalent to 3.08 with stock tires. Your current setup (if you have 2.72 gears) 30.6" vs 28.3" means it has 2.52 ratio equivalent. AMC usually ran 3.08 in the FSJs with V8 before '80, so 3.31 would be a good match and could even allow for an O/D later. I had 2.37 in my Eagle and it was a total slug except on the highway when I needed to pass. > # > # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > # > # > # > Date: Mon, 20 Jun 2011 16:00:31 -0700 > # > From: john-at-wagoneers.com > # > To: fsj-at-digest.net; xj-at-digest.net > # > Subject: fsj: tires - J10 > # > > # > the '83 J10 is supposed to have: 225/75/15. > # > > # > it has 265/70/16's > # > > # > supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error (calculated 9.x %...) > # > > # > if I stay with 16" rims I could run a 205/75/16 to be 0.6% too fast... :) > # > > # > if I go smaller I will increase my gear ratio which will be better in town, but I'm concerned about > # > going too small... smaller tires will also bear less weight... 2.72 gears really stink, unless > # > you're trying to set a land speed record or something... not sure what Jeep was thinking using these ratios. > # > sure it's only turning about 1900 rpm at 60mph.. but getting to 60mph requires a small oil tanker and a sundial... :) > # > > # > john > # > > # > > # > ----- > # > - ------------------------------------------------------------------------ > # > -o|||||o- > # > Snohomish, Washington - where Jeeps don't rust, they mold > # > http://AMSOIL.com/redirect.cgi?zo=283461 > # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us > # > - ------------------------------------------------------------------------ > # ------------------------------ Date: Mon, 20 Jun 2011 20:21:56 -0700 (PDT) From: john Subject: RE: fsj: tires - J10 there was never a Full Size jeep designed to run 33's, well except maybe the m715 and I doubt they went that big... why did the scouts do so well with 3.54/s and 235s? I suspect that you'll have to keep the speed down to about 60 mph to do that... they were created when the double nickel was still in effect... when did they eliminate that lunacy? john ----- - ------------------------------------------------------------------------ -o|||||o- Snohomish, Washington - where Jeeps don't rust, they mold http://AMSOIL.com/redirect.cgi?zo=283461 http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us - ------------------------------------------------------------------------ On Mon, 20 Jun 2011, Jim Blair wrote: # # 3.54 with the V8 should only be run with 33" tires or O/D # # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 # # # > Date: Mon, 20 Jun 2011 19:49:35 -0700 # > From: john-at-wagoneers.com # > To: carnuck-at-hotmail.com # > CC: fsj-at-digest.net; xj-at-digest.net # > Subject: RE: fsj: tires - J10 # > # > really don't have money for tires or gears right now... :) # > # > the tires have lots of tread... they're really likely good for the highway, but not # > so good for use in my yard... of course I have them pumped to max pressure for the run up # > from vancouver. :) # > # > I'd love to put 3.31s or 3.54 in this truck and 235s... would work nicer... but I'm not keeping this # > one, and superdawg has 3.54s with 235s, the same setup as the scout Turbo Diesels that were # > rated at 20/24 mpg. :) # > # > john # > # > # > # > ----- # > ------------------------------------------------------------------------ # > -o|||||o- # > Snohomish, Washington - where Jeeps don't rust, they mold # > http://AMSOIL.com/redirect.cgi?zo=283461 # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us # > ------------------------------------------------------------------------ # > # > # > On Mon, 20 Jun 2011, Jim Blair wrote: # > # > # # > # If you tires are still good, I'd swap to 3.31 gears. That will give you the equivalent to 3.08 with stock tires. Your current setup (if you have 2.72 gears) 30.6" vs 28.3" means it has 2.52 ratio equivalent. AMC usually ran 3.08 in the FSJs with V8 before '80, so 3.31 would be a good match and could even allow for an O/D later. I had 2.37 in my Eagle and it was a total slug except on the highway when I needed to pass. # > # # > # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 # > # # > # # > # > Date: Mon, 20 Jun 2011 16:00:31 -0700 # > # > From: john-at-wagoneers.com # > # > To: fsj-at-digest.net; xj-at-digest.net # > # > Subject: fsj: tires - J10 # > # > # > # > the '83 J10 is supposed to have: 225/75/15. # > # > # > # > it has 265/70/16's # > # > # > # > supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error (calculated 9.x %...) # > # > # > # > if I stay with 16" rims I could run a 205/75/16 to be 0.6% too fast... :) # > # > # > # > if I go smaller I will increase my gear ratio which will be better in town, but I'm concerned about # > # > going too small... smaller tires will also bear less weight... 2.72 gears really stink, unless # > # > you're trying to set a land speed record or something... not sure what Jeep was thinking using these ratios. # > # > sure it's only turning about 1900 rpm at 60mph.. but getting to 60mph requires a small oil tanker and a sundial... :) # > # > # > # > john # > # > # > # > # > # > ----- # > # > ------------------------------------------------------------------------ # > # > -o|||||o- # > # > Snohomish, Washington - where Jeeps don't rust, they mold # > # > http://AMSOIL.com/redirect.cgi?zo=283461 # > # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us # > # > ------------------------------------------------------------------------ # > # # ------------------------------ Date: Mon, 20 Jun 2011 22:25:33 -0500 From: Scotiapilot Subject: Re: fsj: tires - J10 My 82 cherokee chief wide trac had 331 gears and I had perfect 32x12.5-15 on it. both off road and onraod was seemingly perfect fit. On Mon, Jun 20, 2011 at 10:21 PM, john wrote: > there was never a Full Size jeep designed to run 33's, well except maybe > the m715 and I doubt they went that big... > > why did the scouts do so well with 3.54/s and 235s? I suspect that you'll > have to keep the speed down to about 60 mph to do that... they were created > when the double nickel was still in effect... when did they eliminate that > lunacy? > > john > > > > > > ----- > ------------------------------------------------------------------------ > -o|||||o- > Snohomish, Washington - where Jeeps don't rust, they mold > http://AMSOIL.com/redirect.cgi?zo=283461 > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us > ------------------------------------------------------------------------ > > > On Mon, 20 Jun 2011, Jim Blair wrote: > > # > # 3.54 with the V8 should only be run with 33" tires or O/D > # > # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > # > # > # > Date: Mon, 20 Jun 2011 19:49:35 -0700 > # > From: john-at-wagoneers.com > # > To: carnuck-at-hotmail.com > # > CC: fsj-at-digest.net; xj-at-digest.net > # > Subject: RE: fsj: tires - J10 > # > > # > really don't have money for tires or gears right now... :) > # > > # > the tires have lots of tread... they're really likely good for the > highway, but not > # > so good for use in my yard... of course I have them pumped to max > pressure for the run up > # > from vancouver. :) > # > > # > I'd love to put 3.31s or 3.54 in this truck and 235s... would work > nicer... but I'm not keeping this > # > one, and superdawg has 3.54s with 235s, the same setup as the scout > Turbo Diesels that were > # > rated at 20/24 mpg. :) > # > > # > john > # > > # > > # > > # > ----- > # > > ------------------------------------------------------------------------ > # > -o|||||o- > # > Snohomish, Washington - where Jeeps don't rust, they mold > # > http://AMSOIL.com/redirect.cgi?zo=283461 > # > http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us > # > > ------------------------------------------------------------------------ > # > > # > > # > On Mon, 20 Jun 2011, Jim Blair wrote: > # > > # > # > # > # If you tires are still good, I'd swap to 3.31 gears. That will give > you the equivalent to 3.08 with stock tires. Your current setup (if you have > 2.72 gears) 30.6" vs 28.3" means it has 2.52 ratio equivalent. AMC usually > ran 3.08 in the FSJs with V8 before '80, so 3.31 would be a good match and > could even allow for an O/D later. I had 2.37 in my Eagle and it was a total > slug except on the highway when I needed to pass. > # > # > # > # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > # > # > # > # > # > # > Date: Mon, 20 Jun 2011 16:00:31 -0700 > # > # > From: john-at-wagoneers.com > # > # > To: fsj-at-digest.net; xj-at-digest.net > # > # > Subject: fsj: tires - J10 > # > # > > # > # > the '83 J10 is supposed to have: 225/75/15. > # > # > > # > # > it has 265/70/16's > # > # > > # > # > supposed to be 28.3 OD - is 30.6" OD - that's a 8.2% error > (calculated 9.x %...) > # > # > > # > # > if I stay with 16" rims I could run a 205/75/16 to be 0.6% too > fast... :) > # > # > > # > # > if I go smaller I will increase my gear ratio which will be > better in town, but I'm concerned about > # > # > going too small... smaller tires will also bear less weight... > 2.72 gears really stink, unless > # > # > you're trying to set a land speed record or something... not sure > what Jeep was thinking using these ratios. > # > # > sure it's only turning about 1900 rpm at 60mph.. but getting to > 60mph requires a small oil tanker and a sundial... :) > # > # > > # > # > john > # > # > > # > # > > # > # > ----- > # > # > > ------------------------------------------------------------------------ > # > # > -o|||||o- > # > # > Snohomish, Washington - where Jeeps don't rust, they mold > # > # > http://AMSOIL.com/redirect.cgi?zo=283461 > # > # > http://JohnMeister.com HTTP://WAGONEERS.COM > http://fotomeister.us > # > # > > ------------------------------------------------------------------------ > # > # > # > - -- "Item, qe nul soit si hardy de crier havok sur peine davoir la test coupe." Cry 'Havoc,' and let slip the dogs of war; That this foul deed shall smell above the earth With carrion men, groaning for burial. ------------------------------ End of fsj-digest V1 #3730 **************************