720newbie Posted March 11, 2014 Report Share Posted March 11, 2014 What is the biggest tire size people have fit on there truck with stock height and a small torsion bar cranking. I'm wanting to go look at a set of 265/75/16 but am not sure if they will fit 1 Quote Link to comment
flatcat19 Posted March 11, 2014 Report Share Posted March 11, 2014 That's a super tall tire for a 16. Especially at 265. The 13's that came with these were 70 or 75 series already. The side wall height(70) is the percentage of the width. 70% of a 265 is a BIG tire. What wheels are you trying to use? 1 Quote Link to comment
datzenmike Posted March 11, 2014 Report Share Posted March 11, 2014 I think the 720s were 195/75R14 standard and 205/75R14 for the aluminum mag while 4x4s got 215/75R15s. The 4x4 with the most clearance could run a 29" diameter tire without too much trouble. The problem with this is the extreme loss of power as the Z24 powered 720s also went from 4.375 down to a terrible 4.11 differential 1 Quote Link to comment
flatcat19 Posted March 11, 2014 Report Share Posted March 11, 2014 I missed this was for a 720. Still a huge difference between a 265/70 and a 195/75. 1 Quote Link to comment
ggzilla Posted March 11, 2014 Report Share Posted March 11, 2014 13s on a Datsun Pickup? That's a bit small. The 13's that came with these were 70 or 75 series already. 1 Quote Link to comment
flatcat19 Posted March 11, 2014 Report Share Posted March 11, 2014 Maybe it was 14s. Been so long since I had the stock 521. They were still 70s though. 1 Quote Link to comment
Yeti Posted March 11, 2014 Report Share Posted March 11, 2014 I have 235/75/15. At stock height I wouldn't want to go any bigger. With cranked torsion bars 31" tires should fit, but may rub (and you'll likely need an alignment) 1 Quote Link to comment
datzenmike Posted March 11, 2014 Report Share Posted March 11, 2014 185/75R14 are 25.5" diameter 2wd 720 215/75R15 are 27.75" 4x4 720 265/75R15 are 28.8" 265/75R16 are 29.9... 29 is considered the cut off for stock ride height 4x4 720 tires. 1 Quote Link to comment
Yeti Posted March 11, 2014 Report Share Posted March 11, 2014 185/75R14 are 25.5" diameter 2wd 720 215/75R15 are 27.75" 4x4 720 265/75R15 are 28.8" 265/75R16 are 29.9... 29 is considered the cut off for stock ride height 4x4 720 tires. Unless I'm calculating it wrong, I'm pretty sure 265/75R15 is 30.65" and 265/75R16 is around 31.65 2 Quote Link to comment
JoeCool Posted March 11, 2014 Report Share Posted March 11, 2014 Unless I'm calculating it wrong, I'm pretty sure 265/75R15 is 30.65" and 265/75R16 is around 31.65 It is closer to 32" when installed on a 7" wide wheel. I had some on my 4wd Frontier Crew Cab. These are helpful when figuring out tire sizes: http://tire-size-conversion.com/tire-size-calculator/ http://www.miata.net/garage/tirecalc.html http://www.1010tires.com/Tools/Tire-Size-Calculator 1 Quote Link to comment
datzenmike Posted March 11, 2014 Report Share Posted March 11, 2014 Corrected. Those were for 235/75R15 my bad. 265/75R15 and 265/75R16 are too large and will rub. 29" on stock truck will rub slightly on bumpy turns 4x4ing. Raising the torsion bars or a body lift might reduce this. 1 Quote Link to comment
720newbie Posted March 11, 2014 Author Report Share Posted March 11, 2014 Ok cool thanks guys for the input... looks like some bills need paid before tires so it's gonna have to wait 1 Quote Link to comment
ronnny Posted March 12, 2014 Report Share Posted March 12, 2014 I have the 265/75r16 on my truck on late 90's z71 wheels with the torsion bars cranked and about 2" longer shackles in the rear. Almost all the finder trimming you can do on the front closest to the floorboard and if turning and more than a slight hill they rub. But the tires were free to me and close to new. By the way it is a 85 720 4x4 regular cab. Oh and turning to sharp on flat ground they also rub. 1 Quote Link to comment
720newbie Posted March 12, 2014 Author Report Share Posted March 12, 2014 Ok cool maybe I'll just do 31's or close to it 1 Quote Link to comment
datzenmike Posted March 12, 2014 Report Share Posted March 12, 2014 265/75R16s are 30.63" tall. Read ronny's post above yours... they rub. 31's will be worse. Now if you drive only on the street you can probably get away with something over 29". 1 Quote Link to comment
Robert Posted March 12, 2014 Report Share Posted March 12, 2014 29" is max. 31" too big unless your driving around the world without turning. 1 Quote Link to comment
ronnny Posted March 12, 2014 Report Share Posted March 12, 2014 my tire as it sets in the yard is almost right under 31". If I could trade these all terrians for a set of 29" mud I would do it in a minute. 2 Quote Link to comment
720newbie Posted March 13, 2014 Author Report Share Posted March 13, 2014 Ok 29 or 30 is it then til it gets lifted 1 Quote Link to comment
Lakec423 Posted April 7, 2014 Report Share Posted April 7, 2014 i barely fit 235/75r16 tires and i got 2 inch lift with the torsion bars turned up 1 Quote Link to comment
KustavK Posted March 30, 2023 Report Share Posted March 30, 2023 On 3/12/2014 at 10:13 PM, Robert said: 29" is max. 31" too big unless your driving around the world without turning. Does this also apply to 2wd? Quote Link to comment
datzenmike Posted March 30, 2023 Report Share Posted March 30, 2023 4x4 sit higher so tire size is even more critical for a 2wd. So no, doesn't apply to 2wd. I think the 720 tire size is about 26" diameter 195/75R14 and 205/75R14 for 2wd and 215/75R15 for 4x4 which are almost 28". Larger diameter, besides lowering clearance, also affect the over all differential ratio making acceleration more sluggish than it needs to be and adds speedometer error too. Always keep the stock diameter. You can always select a tire with more width for traction and looks. A stock 2wd tire is 6.7" wide and a 225/65R14 is identical but an inch wider. Quote Link to comment
powderfinger Posted March 30, 2023 Report Share Posted March 30, 2023 For sure stay close to stock diameter. You may like the look of a larger tire but you will soon regret it. Your acceleration will become very sluggish and you'll be shifting like crazy at every incline you get to. Quote Link to comment
datzenmike Posted March 30, 2023 Report Share Posted March 30, 2023 I had 4:11 differential and 33s on my 620. The tires made the engine think I had a 3.329 differential. Hardly used 3rd in town, highway was hard to hold speed limit in 5th. Had to down shift every incline and if it was windy I stayed in 4th. I destroyed my 4.375s and a 4.11 was all I had laying around. 4.625 or 4.875 would have been the tits. Quote Link to comment
Madkaw Posted March 30, 2023 Report Share Posted March 30, 2023 Don’t do it - I’m regretting my decision on 255/70/16 . My 4WD is 3.9 gears and that dropped to 3.3 with those tires . Truck is doggy slow . Now I’ll loose money selling my Goodyears to buy more Goodyears . I’ll sell you mine - lol Quote Link to comment
IZRL Posted April 3, 2023 Report Share Posted April 3, 2023 Just to confirm hahaha. 30x9.5xR15 on 15X7s will rub and will make the truck run sluggish on 4x4 720? I really like the stance and tire/wheel combo on this bushmaster. I bought the wheels already but haven't purchased the tires. https://bringatrailer.com/listing/1984-nissan-720-bushmaster-truck/ Quote Link to comment
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