After Market wheels for 71 fj40 (1 Viewer)

[Cpegues]

Newbie here! Looking to replace my stock rims and tires on a 1971 fj40. I’ll be installing a 4in lift kit and want 20x12 wheels. I can’t find a seller that makes a 6 on 5.5 bolt pattern wheel with a 3.5 backspacing bigger than 17in. in diameter. Can some tell me from experience if I can make a 4.5 Or 4.75 backspacing work on the bigger wheels? If so how?
Also what’s the biggest tire I could fit with this modification?
Thank you!

 

[Jdc1]

Newbie here! Looking to replace my stock rims and tires on a 1971 fj40. I’ll be installing a 4in lift kit and want 20x12 wheels. I can’t find a seller that makes a 6 on 5.5 bolt pattern wheel with a 3.5 backspacing bigger than 17in. in diameter. Can some tell me from experience if I can make a 4.5 Or 4.75 backspacing work on the bigger wheels? If so how?
Also what’s the biggest tire I could fit with this modification?
Thank you!

Welcome. If you hang out a while, you’ll notice most of us like the stock steelie look the best.

 

[JackA]

Why on earth would you want to put a 20 inch rim on a 40? It's not a donk

 

[GA Architect]

Click here > FJ40 & 20 inch rims <

 

[kerplunk]

I put 17" rims off an FJ Cruiser on mine with 255/75R17 MTs. They ride nice, and I like the look. (but 20x12 is probably overdoing it in my opinion).

But, as you seem to already realize, the offset / backspacing is an issue. I haven't measured my wheels, but they will hit the insides of the wheel well without spacers.

I have an FJ60 rear end case that I'm planning on swapping in, but can't comment on how much work this really is yet, other than to say the spring pad are in the wrong place and the bolt pattern for the brakes is different (will be upgrading to disks). All I really know is that it is 2" wider.

The front just fit, no rubbing that I can see. And looking down the side of the vehicle, it "looks" like front and rear are the same width (with 1" spacers in the rear). But, I dunno what the PO did with the front end, only that it has disk brakes which are probably not original (definitely not base equipment that year).

 

[pjohnson]

If you are actually serious about lifting your car and putting huge rims on it, you don't want 4.5" backspacing. You want the wheels to stick out as far as possible to help prevent flipping it on its side in a hard turn.

The FJ40 is a short wheelbase vehicle. You begin to sacrifice safety as soon as you raise the center of gravity from stock.

I won't touch the visual aspect of what your considering as I don't like the huge wheel look on any vehicle. I appreciate proper visual proportion to everything.

 

[Downey]

^^^^ Another way of saying this is: for every 1 inch you go up you have to go 1 1/2" wider to buy back the lost center of gravity

Gee Whiz information: I learned this when working with the Vehicle Equipment Safety Commission in Wash D.C.

 

[Warloc]

15 x 8 inch steel Rock Crawlers with 33’s. This way when you air down for any serious wheeling you get plenty of rubber on the trail IMO. Plus they come made for the 40 with correct spacing. Desert Rat in AZ ships to your house, easy breezy. Bought mine with tires mounted and balanced ready to roll.

 

[69LC]

People stuffed 35x12.50r15s onto 40s with 4' SUA lifts for years. How tall of a tire are you hoping to run? Do you still have four wheel drum brakes, or have you converted to later style discs? Toyota used different styles of wheels from the factory, and there is a lot of upgrade potential with the later disc brake axle parts.

I would guess that a 20" wheel would clear the end of the tie rod ends. At full lock you might rub the inside of the front tires on your leaf springs or steering linkage though if the wheels you want clear the TREs with the deep backspacing.

I'm not a purist or a fan of big rims, but if running big rims is what you're determined to do I'd like to see it done as safely as possible.

 

[Sheck44]

Here you go ...

TOYOTA

SCS WHEEL MODELS DESIGNED FOR TOYOTA TRUCKS AND SUVs

www.stealthcustomseries.com

You'll just have to wait these sell out VERY quickly

Cheers
Steve

 

[GA Architect]

This is another site that specializes in Toyota wheels:

FN Wheels

 

[Cpegues]

People stuffed 35x12.50r15s onto 40s with 4' SUA lifts for years. How tall of a tire are you hoping to run? Do you still have four wheel drum brakes, or have you converted to later style discs? Toyota used different styles of wheels from the factory, and there is a lot of upgrade potential with the later disc brake axle parts.

I would guess that a 20" wheel would clear the end of the tie rod ends. At full lock you might rub the inside of the front tires on your leaf springs or steering linkage though if the wheels you want clear the TREs with the deep backspacing.

I'm not a purist or a fan of big rims, but if running big rims is what you're determined to do I'd like to see it done as safely as possible.

Ideally I’d like to run 37 or 38in tires. I don’t love the look of a 15” wheel on a huge tire but I could learn to love a 17” if the spacing makes more sense. Definitely want to go wider as I’m going up for the safety aspect. It’s been converted to disc breaks but otherwise is pretty stock.

 

[Cpegues]

If you are actually serious about lifting your car and putting huge rims on it, you don't want 4.5" backspacing. You want the wheels to stick out as far as possible to help prevent flipping it on its side in a hard turn.

The FJ40 is a short wheelbase vehicle. You begin to sacrifice safety as soon as you raise the center of gravity from stock.

I won't touch the visual aspect of what your considering as I don't like the huge wheel look on any vehicle. I appreciate proper visual proportion to everything.

On an FJ are 20” rims considered huge? Not sarcastically asking. I drive a Ram 1500 with a 6” lift running 37x13.5x20 and I love the look. Maybe it’s personal preference over the actual vehicle but I also don’t want the FJ to look funny once it’s all purchased and installed.

 

[Cpegues]

I put 17" rims off an FJ Cruiser on mine with 255/75R17 MTs. They ride nice, and I like the look. (but 20x12 is probably overdoing it in my opinion).

But, as you seem to already realize, the offset / backspacing is an issue. I haven't measured my wheels, but they will hit the insides of the wheel well without spacers.

I have an FJ60 rear end case that I'm planning on swapping in, but can't comment on how much work this really is yet, other than to say the spring pad are in the wrong place and the bolt pattern for the brakes is different (will be upgrading to disks). All I really know is that it is 2" wider.

The front just fit, no rubbing that I can see. And looking down the side of the vehicle, it "looks" like front and rear are the same width (with 1" spacers in the rear). But, I dunno what the PO did with the front end, only that it has disk brakes which are probably not original (definitely not base equipment that year).

Have you had any issues with the spacers?

 

[Cpegues]

Why on earth would you want to put a 20 inch rim on a 40? It's not a donk

Personal preference? I run 37x13.5x20 on my ram and I love the look. Plenty of tread and doesn’t look like a “donk” but again personal preference.

 

[pjohnson]

If you are thinking the same as your ram on the FJ40, then pull a wheel/tire off each vehicle and put one in place on the 40.

 

[kerplunk]

Have you had any issues with the spacers?

Not YET. But I do pull the tire off and re-torque them every couple of months (consider that I only drive the vehicle when it's sunny and warm in Seattle, and even then for short trips). And I only have one socket that fits the nuts holding them on, an impact socket won't fit in the holes the nuts are recessed into, was kinda cumbersome trying to put them on the first time.

Generally, they're a pretty poor solution, adding leverage to the load on the wheel bearings and axle shafts. And I've heard plenty of stories of people watching their tires roll past them down the road due to failures. But I drive like a geezer (still have the orig F engine) and haven't been off road with them, running a much more moderate tire size than you are planning for. And, I only have them in the rear, I have no interest in adding them on the front and putting that additional leverage on my steering.

 

[jim land]

those look like 20 inches

 

[php74]

.....
Modern

 

[Cpegues]

those look like 20 inches
View attachment 2378869

Do you have anymore info on this vehicle?