I want to put 25" tires on my 2000 scrambler 500 4x4 but don't know what rims will fit.
anyone know?

 

You can run 12x7 on the front and rear with 4x4 front and 4x156 rear bolt patterns. If you run 25's you will have to move the floor boards forward to the last holes. Anything bigger than 25's and you will have to go to a longer swingarm. Check out my signature and you will see what I am running.

Scott

Scrambler 500 Pics

 

I am a bit confused.
Wont this screw up the 4x4 system on a SCRAMBLER?
The stock tire sizes are 22/11-10 on the rear, and 23/7-10 on the front. This tells me the rear actully spins faster compared to the fronts in stock form (One revolution of 23" goes farther that one revolution of 22&quot. If you put 25" all the way around the front to rear gear ratio changes .

If the 4x4 detects slip it engages the front hubs. If you change the tire sizes won't it screw the 4x4 engagement up, plus add stress in the Drive train when it does engage with the diffent gear Ratio front to rear compared to stock after changing tire sizes??????? [img]i/expressions/face-icon-small-confused.gif[/img]

 

The gear ratios are such that the front wheels are spun slower than the rears. This way, the 4x4 will not engage unless the rear tires slip a tiny bit. I worked out the math since I put different tires on my Scram.

FRONT 23" tire=72.26" rollout * 11T/22T * 12T/22T = 19.7" per shaft revolution.

REAR 22" tire=69.12" rollout * 13T/38T = 23.6" per shaft rev.

The rear tires must slip almost 4 inches for the fronts to "engage"

I ended up going to an 11 tooth sprocket for the rear (front) and 22 inch tires on the front with stock gearing.

 

Dave B
I understand that the Rear will need to spin more for the 4x4 to engage.
Once it does engage, with out a gear change there must be binding from front to Rear. (Plus I would think Harsher engagement)

You changed you Rear Drive sprocket to 11 from 12 ?
11/38 vs 12/38 is 3:45-1 Vs 3:17-1
This made up for your difference? You did slow the rears down more.
How close is it to stock gearing if you figure the different tire sizes?

 

Engagement on mine is as unnoticable as stock. With stock gearing and stock tires the rears move 11% faster than the fronts. With my lower rear gearing and 1 inch shorter front tire it is 6% faster.....doesn't seem to affect it at all. Now as you put larger tires on (25" in this case) the ratio between the front and rear increases. With stock gearing and 25 inchers front and rear, the rears will move 15% faster than the front....which means they will have to spin a hair more in order to engage the fronts. If you drop the rear sprocket to an 11 toother....the ratio goes back to 6%....same as mine.

 

The actual diffence in circumference between the stock 22/23 tires is almost non existant once air pressure and variant weight loads are considered.


Generally the difference in tire size from front to back is intended to enhance a certain handling characteristic. The drive ratios are very tollerant of such small changes so running 25's all the way around should not affect much if anything.

Think of it this way- You and a buddy may both have totally stock machines, but because he is 275lbs and you are 150lbs, his rear tires may actually have a smaller rolling diameter than yours, yet this will have no adverse affect on his machines drive trane (other than the fact that he is 275)

 

ALL I KNOW IS THAT SCRAMS SUCK *****.

 

HondaRyder,

If they suck so bad then why are you in this forum drooling over them?

Scott

Scrambler Pics

 

Ok guys, I am running 25's all the way around and I am not experiencing any problems at all. Everything works great in reverse, high, and low. Just like the others have stated, there isn't enough difference to hurt anything. As a matter of fact, the Explorer 4x4 runs the exact gear for the rear as well as the front. The tranny, with the exception of low range, is the same as the Scrambler and it runs the same size front and rear 25x8 and 25x11.

Scott

Scrambler Pics