Front rotor size?

[clanofwolves]

I was thinking of replacing the rotors this time when I replace the front pads. When I checked with RockAuto, there seems to be two sizes: 297mm and 319mm. Anyone know how to tell how to decipher which one is on our 4 save measuring them?

 

[SpidermanGeek]

If I recall correctly, 4Runner SR5 Highlander/Sport Edition and 4Runner Limited came with larger brakes.

If your T4R came with 16" wheels from factory, there's a good chance you have the larger brakes.

Someone else may have a more definite answer for you though.

 

[jgue467]

If I recall correctly, 4Runner SR5 Sport Edition and 4Runner Limited came with larger brakes.

If your T4R came with 16" wheels from factory, there's a good chance you have the larger brakes.

Someone else may have a more definite answer for you though.

That is correct! :cowboy:

 

[clanofwolves]

...ours is an SR5 with al the bells save 4wd; I'm guessing we have the larger rotors. Thanks!!

Dave

 

[pauldub]

Do you have OEM 16" wheels?

 

[88toy4x4]

Wheel size from the factory is key as posted above. If you have factory 16" wheels, you have the larger rotors. If you have factory 15" wheels(like I started with) you have the smaller rotor which is very prone to warping.

 

[Schroeter]

Small Rotor/Caliper to larger Rotor/Caliper upgrade question

I'm running the 16 inch wheels now but my truck came with the 15 inch wheels and the smaller front brakes. I am about to replace calipers and would like to move up to the larger 319mm rotors and larger calipers.

Is this just an easy bolt on upgrade or is there more to it?

 

[Bad Luck]

I'm running the 16 inch wheels now but my truck came with the 15 inch wheels and the smaller front brakes. I am about to replace calipers and would like to move up to the larger 319mm rotors and larger calipers.

Is this just an easy bolt on upgrade or is there more to it?

You'll just need the larger calipers/rotors/pads and it bolts right up. I'd also recommend replacing your front brake lines if they are original and since you'll have to bleed the brakes anyways. Make sure to not run the brake fluid reservoir dry. You can either plug the brake lines with silicone plugs when you remove them or I prefer to take a 2x4 and place it between the seat and brake pad to apply a small amount of pressure to the brake pedal which will keep the brake lines from gravity bleeding/draining.

 

[Schroeter]

You'll just need the larger calipers/rotors/pads and it bolts right up. I'd also recommend replacing your front brake lines if they are original and since you'll have to bleed the brakes anyways. Make sure to not run the brake fluid reservoir dry. You can either plug the brake lines with silicone plugs when you remove them or I prefer to take a 2x4 and place it between the seat and brake pad to apply a small amount of pressure to the brake pedal which will keep the brake lines from gravity bleeding/draining.

Thank you VERY much!

 

[Schroeter]

OEM parts vs aftermarket (calipers/rotors/pads)

Is it worth spending extra for Toyota OEM remanufactured calipers versus other remanufactured calipers?

The rotors and pads are not too expensive from Toyota, but are they as good as a modern high carbon, coated rotor? Are the Toyota pads premium ceramic?

 

[phattyduck]

Upgrade the rear wheel cylinders while you are at it. The 16" wheel trucks have a bigger rear wheel cylinder too, to balance out the larger front brakes.

-Charlie