Bigger tires on stock wheels
#1
Bigger tires on stock wheels
Be looked all over this thread and can't really find an answer. What are the biggest tires that will fit onto stock wheels of a 2014 JKU? I want to get 33" but the width of the confuses me. Also the metric conversion doesn't make sense to me. I don't know which tires are 33" (285, 295, etc). I'm looking at BFG ko2 285/70/17s but not sure if they'll fit the wheels. I can't afford new wheels right now.
I know it's a dumb question with likely a simple answer so I appreciate any response!
I know it's a dumb question with likely a simple answer so I appreciate any response!
#2
Super Moderator
Be looked all over this thread and can't really find an answer. What are the biggest tires that will fit onto stock wheels of a 2014 JKU? I want to get 33" but the width of the confuses me. Also the metric conversion doesn't make sense to me. I don't know which tires are 33" (285, 295, etc). I'm looking at BFG ko2 285/70/17s but not sure if they'll fit the wheels. I can't afford new wheels right now.
I know it's a dumb question with likely a simple answer so I appreciate any response!
I know it's a dumb question with likely a simple answer so I appreciate any response!
This link converts tire sizes.
Tire Size Converter | Metric to Inch Tire Size Calculator
The KO2 is an excellent tire. We run this exact size on my wife's jeep with no spacers and no rubbing. Great tire.
#4
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Metric conversion
Be looked all over this thread and can't really find an answer. What are the biggest tires that will fit onto stock wheels of a 2014 JKU? I want to get 33" but the width of the confuses me. Also the metric conversion doesn't make sense to me. I don't know which tires are 33" (285, 295, etc). I'm looking at BFG ko2 285/70/17s but not sure if they'll fit the wheels. I can't afford new wheels right now.
I know it's a dumb question with likely a simple answer so I appreciate any response!
I know it's a dumb question with likely a simple answer so I appreciate any response!
the 285 = 28.5 cm in tire width. Since there are 2.54 cm/inch, the division results in 11.22 inches of tire width.
The sidewall height is 70% of the tire width = 7.854 ".
The tire height = 2 xs the sidewall height + 17 " of wheel diameter = 32.7 inches. And by the time the tire warms up, it should be at least 33 inches.
But my KO2s on 17" wheels cold really only measure ~31 inches on the tape. They probably get to about 32 when warm, but I can't say that I have measured them warm.
The width and the bossy tread is cosmetically attractive enough, even w/o the "true" 33" height, and the mileage is probably a bit better as well. I haven't done any rock crawling, but I have the security of very well built sidewalls if I do, albeit stiffer than other tires, so the ride will be harder until you air down.
#5
Super Moderator
My understanding of the metric conversion is as follows for the 285/70/17s:
the 285 = 28.5 cm in tire width. Since there are 2.54 cm/inch, the division results in 11.22 inches of tire width.
The sidewall height is 70% of the tire width = 7.854 ".
The tire height = 2 xs the sidewall height + 17 " of wheel diameter = 32.7 inches. And by the time the tire warms up, it should be at least 33 inches.
But my KO2s on 17" wheels cold really only measure ~31 inches on the tape. They probably get to about 32 when warm, but I can't say that I have measured them warm.
The width and the bossy tread is cosmetically attractive enough, even w/o the "true" 33" height, and the mileage is probably a bit better as well. I haven't done any rock crawling, but I have the security of very well built sidewalls if I do, albeit stiffer than other tires, so the ride will be harder until you air down.
the 285 = 28.5 cm in tire width. Since there are 2.54 cm/inch, the division results in 11.22 inches of tire width.
The sidewall height is 70% of the tire width = 7.854 ".
The tire height = 2 xs the sidewall height + 17 " of wheel diameter = 32.7 inches. And by the time the tire warms up, it should be at least 33 inches.
But my KO2s on 17" wheels cold really only measure ~31 inches on the tape. They probably get to about 32 when warm, but I can't say that I have measured them warm.
The width and the bossy tread is cosmetically attractive enough, even w/o the "true" 33" height, and the mileage is probably a bit better as well. I haven't done any rock crawling, but I have the security of very well built sidewalls if I do, albeit stiffer than other tires, so the ride will be harder until you air down.
#6
I'm kind of in a similar position as sleepinggas14, 2015 JK 2d Sport with 17 Alloy wheels, looking at the same BFG tire. I happen to live very close to 4Wheel Parts and they told me they would not install a 33" tire without a lift kit, as they would not put a customer in a situation where the tire may not fit. Guessing this could be a sales tactic, but I just want to ask the Forum for their thoughts. I know the tire will fit the rim, but will the tire cause me any issues since it's roughly 1" in taller and 1" wider?
I have never really planned on lifting the Jeep, as this is a daily driver, and most of my off-roading is fire roads in and out of Yosemite Valley in NoCal, and a few trail heads in SoCal. That said, with the BFG tires (285X70X17), what factors should I consider in a new wheel? How much back spacing should I consider?
Last question, the current tire is a 255X75X17 Goodyear Wrangler, looks more like a highway tread than an All Terrain tread. How will the bigger BFG tire affect my current driving (comfort, traction, mileage, noise)?
Thanks for any feedback!
I have never really planned on lifting the Jeep, as this is a daily driver, and most of my off-roading is fire roads in and out of Yosemite Valley in NoCal, and a few trail heads in SoCal. That said, with the BFG tires (285X70X17), what factors should I consider in a new wheel? How much back spacing should I consider?
Last question, the current tire is a 255X75X17 Goodyear Wrangler, looks more like a highway tread than an All Terrain tread. How will the bigger BFG tire affect my current driving (comfort, traction, mileage, noise)?
Thanks for any feedback!
#7
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Tire size w/o lift
I'm kind of in a similar position as sleepinggas14, 2015 JK 2d Sport with 17 Alloy wheels, looking at the same BFG tire. I happen to live very close to 4Wheel Parts and they told me they would not install a 33" tire without a lift kit, as they would not put a customer in a situation where the tire may not fit. Guessing this could be a sales tactic, but I just want to ask the Forum for their thoughts. I know the tire will fit the rim, but will the tire cause me any issues since it's roughly 1" in taller and 1" wider?
I have never really planned on lifting the Jeep, as this is a daily driver, and most of my off-roading is fire roads in and out of Yosemite Valley in NoCal, and a few trail heads in SoCal. That said, with the BFG tires (285X70X17), what factors should I consider in a new wheel? How much back spacing should I consider?
Last question, the current tire is a 255X75X17 Goodyear Wrangler, looks more like a highway tread than an All Terrain tread. How will the bigger BFG tire affect my current driving (comfort, traction, mileage, noise)?
Thanks for any feedback!
I have never really planned on lifting the Jeep, as this is a daily driver, and most of my off-roading is fire roads in and out of Yosemite Valley in NoCal, and a few trail heads in SoCal. That said, with the BFG tires (285X70X17), what factors should I consider in a new wheel? How much back spacing should I consider?
Last question, the current tire is a 255X75X17 Goodyear Wrangler, looks more like a highway tread than an All Terrain tread. How will the bigger BFG tire affect my current driving (comfort, traction, mileage, noise)?
Thanks for any feedback!
I can't speak to back spacing since I changed wheels coincident w/ the tires, so you will have some homework to do or others can advise. I have had no problems with rub and since your are adding only 30 mm total, split on both sides, it really adds only about 5/8" to the inner width; unlikely to be significant.
As for driveabiltiy of the KO2s , i have not noted any increased road noise. I have not compared mileage yet. Comfort is probably better than before, but perhaps only because I aired down to 35 psi and will go down to 30 on hwy as advised by at least 2 sources. And probably to 18 if I get on any serious rock trails.
Several opinions on the JK Forum strongly recommended these tires as did my retailer. My hesitation was the stiff sidewall since I was seeking a softer ride; so there are other softer tires out there and JK forum has a comparison elsewhere on this site, but security of the strong (but stiffer) sidewall sold me on these. So far so good after a mere 3 months of very intermittent driving on vacations.
Good luck. Hopefully others with longer experience will chime in.
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#8
Fishtailer, many thanks for a well thought out response. One last question, "did you change out your stock shocks?"
The 2-d Sport shocks are not very good. Was thinking of Bilstein 5100's.
The 2-d Sport shocks are not very good. Was thinking of Bilstein 5100's.
#9
Super Moderator
Rancho is having a buy 3, get 1 free sale right now and they've got a 90 ride guarantee. I've got the 5000x shocks and they're alright but you may want to try something a little higher end if you dislike the factory ride. Rancho offers an adjustable shock, the 9000x.
#10
I'm kind of in a similar position as sleepinggas14, 2015 JK 2d Sport with 17 Alloy wheels, looking at the same BFG tire. I happen to live very close to 4Wheel Parts and they told me they would not install a 33" tire without a lift kit, as they would not put a customer in a situation where the tire may not fit. Guessing this could be a sales tactic, but I just want to ask the Forum for their thoughts. I know the tire will fit the rim, but will the tire cause me any issues since it's roughly 1" in taller and 1" wider? I have never really planned on lifting the Jeep, as this is a daily driver, and most of my off-roading is fire roads in and out of Yosemite Valley in NoCal, and a few trail heads in SoCal. That said, with the BFG tires (285X70X17), what factors should I consider in a new wheel? How much back spacing should I consider? Last question, the current tire is a 255X75X17 Goodyear Wrangler, looks more like a highway tread than an All Terrain tread. How will the bigger BFG tire affect my current driving (comfort, traction, mileage, noise)? Thanks for any feedback!