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Old 08-10-2010, 10:56 AM   #1
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how badly will 32 inch tires affect the performance of my 4cyl Jeep

what kind of loss of power can be expected.. I have 31x10.50 on there now and Its good has decent power and such.

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Old 08-10-2010, 11:01 AM   #2
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You will notice a difference of course, a bit slower, auto or stick?

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Old 08-10-2010, 11:02 AM   #3
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stick shift its has 4.10 gears in the rear axel too
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Old 08-10-2010, 11:18 AM   #4
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I have Pro Comp AT's 32x11.50x15 on my 4 banger. If you go this way you can pretty well forget that 5th gear exists on anything but a flat to downhill highway. The up side is that I'll go just about anywhere. I have huge back spaceing and they rub the heck out of my flairs in a flex(no lift at all). But I plan on replaceing them with some just like them when they wear out.
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Old 08-10-2010, 11:31 AM   #5
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how bad did it hurt your pickup, gas mileage and top end?
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Old 08-10-2010, 11:35 AM   #6
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I'm to weak a person I have NEVER checked mileage, I figured if it makes me happy it's worth it, and 80 on a downhill on I-24 was the best I could get.
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Old 08-10-2010, 11:37 AM   #7
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well mine will do 85 down a hill now or so, not much more than 80 or so on the flat to slightly inclined roads maybe 90 on a steep hill. Howd it affect your acceleration.
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Old 08-10-2010, 11:41 AM   #8
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What's acceleration? lol It's great in 4 low. In 4 hi I endure it because it's a Jeep that goes where I really want to go OFFROAD!
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Old 08-10-2010, 11:44 AM   #9
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what abour 2 wheel drive. On the street is it like it was with 31's or what.
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Old 08-10-2010, 11:49 AM   #10
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I never had 31's but I can tell you if you run 32's it takes patience. It goes down the road fine no steering problems or anything just slower.
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Old 08-10-2010, 12:44 PM   #11
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I recently switched from a 31x10.50, to a 32x11.50 and am now considering regearing from 3.73 to 4.56 and I have a 4.0 litre with a stick. Ya i've pretty much lost 5th gear unless going down hill or 80+mph.
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Old 08-10-2010, 01:38 PM   #12
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Quote:
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I recently switched from a 31x10.50, to a 32x11.50 and am now considering regearing from 3.73 to 4.56 and I have a 4.0 litre with a stick. Ya i've pretty much lost 5th gear unless going down hill or 80+mph.
Really? I have a 2000 TJ Sport 4.0 with 33x12.5 tires, d30/d35 axles, just under 100,000 miles, and I use 5th gear easily at highway speeds. Of course steeper uphills will require a downshift. I haven't regeared, so what ever came stock. ( I really need to check that. )
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Old 08-10-2010, 02:03 PM   #13
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I've got 33 inch tires on my i4 and 121 hp doesn't go far at all. From 31" to 32" you will notice a slight difference but it's not really a biggy. My 0-60 is I think 19 seconds haha. But then again my jeep has an engine problem. It keeps cutting out. If you want more torque then change the rear and front axle gear ratios to like a 4.40 or something. 5th gear can then be useful and better gas mileage will come out of it too.
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Old 08-10-2010, 05:58 PM   #14
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Ya, i live in the foothills of the sierra nevada's so any where I got is a fairly steep grade.
When im in the flatlands it seems to do ok.
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Old 08-11-2010, 04:40 AM   #15
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Somebody has to ask...2.5 or 2.4???????
It DOES make a difference...
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Old 08-11-2010, 06:13 AM   #16
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Is it really necessary to re-gear for 32" tires? Most Saharas and Rubi's even Sport S packages come with 32" inch stock. I've got Goodyear Duratrac LT 245/75/16 or 30.5" tires on my JK and it runs perfectly. That seems to be the optimal size before things start suffering on a JK (i.e. MPG, power, accelaration)
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Old 08-13-2010, 05:46 PM   #17
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I've got 33's on my I4 2.5 with 4.10s and I dont even bother using 5th. MPG isnt horrible, but I do a lot of city driving to and from work so that doesnt help. How are you guys hittin 80MPH?? I can barely get 65 down hill.. and thats with the DW.
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Old 08-14-2010, 01:41 PM   #18
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I know this is a forum for someone else but can y'all help me? I have a 94 jeep wrangler sahara w/t 2.5 i4.
Almost every time I take it out it will start skipping. It'll be runnin on all 4cyl and then start skipping and run on 3 and occasionally 2! Anybody know what's wrong?
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Old 08-14-2010, 09:30 PM   #19
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ive got a 2001 wrangler i4 2.5L. running 285/75 (33in.) and at first 70 was luckyand about 10 MPG. i regeared to 4.88 and new speedo gear to correct speedometer and im now getting 18 MPG. i can now go over 95 up hill. i recommend regearing for the towing,speed and low end power.
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Old 08-18-2010, 06:57 PM   #20
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My 05 willys still has its factory size 215/75r15's on it. I checked and those are the right tires for this edition. They're are pretty sad to be honest. The wife wants 33's but I'm pretty sure id have to upgrade the rims for the width...something I don't want to do as the rims are special to this edition(rally wheels body matched matte moss green). I think I can go to 31s but I'm not sure.
Advice or ideas.
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Old 08-19-2010, 09:22 AM   #21
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Why would anyone want to go 80mph in a wrangler in the first place?
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Old 08-19-2010, 09:44 AM   #22
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What size are 215/75r15? Looking to do 31's or 32's. Wondering how much bigger they are
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Old 08-19-2010, 02:19 PM   #23
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What size are 215/75r15? Looking to do 31's or 32's. Wondering how much bigger they are
To be honest I'm not sure. There freakin tiny for sure. They're the exact size that came on my s10 from the factory. Can't be any bigger than 27" tho. They might as well be tough car tires lol. O wnat to 31s but not sure if they'll be good enough for some light trails. She wants 33s but I'm almost positive they'll rub with suspension travel.
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Old 08-19-2010, 07:16 PM   #24
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you cant be afraid of 80 mph. its the 110 mph thats scary.
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Old 08-19-2010, 08:20 PM   #25
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Quote:
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My 05 willys still has its factory size 215/75r15's on it. I checked and those are the right tires for this edition. They're are pretty sad to be honest. The wife wants 33's but I'm pretty sure id have to upgrade the rims for the width...something I don't want to do as the rims are special to this edition(rally wheels body matched matte moss green). I think I can go to 31s but I'm not sure.
Advice or ideas.
I'm a fan of goodyear but not a loyalist
Yes you can put 31's on stock wheels. If you want wider tires you can use spacers to compensate for the backspace, but depending on how wide your wheels are, you will be somewhat limited in how wide you can go.

And a 215x75x15 is roughly a 27.5x8.5" tire.... 1010TIRES.COM — Tires and Wheels Absolute Authority. find the calculator, it makes life easier..
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Old 08-19-2010, 10:15 PM   #26
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i was running this a bit ago with my friends 32's. From 31 mt/r's to 32 mt/r's it wasn't that bad. its a jeep so don't expect performance but 5th gear was fine. an occasional downshift is neccesary for hills but really its like that with 31's. i also have a 4 banger with a stick so it has 4.10's. it'll be fine if you live in a flat area but if you have constant hills you'll have to stay in 4th.
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Old 02-22-2011, 08:13 AM   #27
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Ok I got a 05 wrangler with the 2.4L 6speed i have i believe a 4 inch total lift not exactly sure what all lift I am currently running 31x10.50x15 AT on the highway there are occasional hills like headed into town and all but i can down shift from 6 to 5th and wave my hand out the window telling people to go around lol i could care less how fast im running i bought a jeep not a sports car, I only drive about 1 mile to work a hardly drive it on family outings but lookin at 33x12.50x15 MT how bad will this overall effect my jeep not meaning will I be able to drag race but like will it tear anything up i dont do any hard core 4wheelin maybe like once a twice a year and then its not extreme its my DD I have stock gears 3:73 on a dana 35rear and 30front years down the road when its paid off i want to go bigger and better with axles, gears, tires, suspension, performance, looks and all but for now I just want it to look good I always want bigger but would 33x1250 be ok to run on a normal daily driver even if maybe over the summer/winter takin it on a 4 hour road trip to the beach or mountains?
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Old 02-22-2011, 08:27 AM   #28
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you cant be afraid of 80 mph. its the 110 mph thats scary.
x2... 90 mph in third gear and 100 in 4th and still going... but the speedometer only goes up to 100mph!!!

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