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Thread: Bigger rotors

  1. #1

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    Bigger rotors

    I have been working on finding some bigger rotors that bolted to our hub, I found some about 3/4 of an inch bigger, I will try some more rotors on monday, This what i have so far





  2. #2


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    Very nice. What is the year/make/model of these rotors as well? Are there any requirements as to the caliper brackets to fit these?

  3. #3

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    rotors

    still working on the rotors

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    any up dates on this?

  5. #5


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    91/92 montero larger brakes on the 4x4 trucks

    You have me wondering about the brakes on 4 wheel drive trucks, when you have an itch, you itch it.
    So with that said, more input is needed. I hope Kane (MainstreaM) see's this so he'll give his much needed 2 cents worth.

    Larger brakes parts from 1992 Montero compared to 1986 4x4 Power Ram 50. Matching part numbers.

    1992 : MITSUBISHI : MONTERO : 3.0L 2972cc 181 cubic inch V6 MFI (S) SOHC : Brake/Wheel Hub : Wheel BearingNATIONAL Part # LM102949 More Info Taper Bearing Cone; Bore=1.7812", Length=0.78", Radius=0.14"
    Front Wheel; Inner
    Front Wheel; Outer
    1987 : DODGE : RAM 50 CUSTOM : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Brake/Wheel Hub : Wheel BearingNATIONAL Part # LM102949 More Info Taper Bearing Cone; Bore=1.7812", Length=0.78", Radius=0.14"
    Front Wheel; 4WD; Outer
    Front Wheel; 4WD; Inner
    ~~~~~~~~~1986 Dodge Ram 50 shows different part#~~~~~~~~~~~

    1992 : MITSUBISHI : MONTERO : 3.0L 2972cc 181 cubic inch V6 MFI (S) SOHC : Brake/Wheel Hub : Spindle BearingNATIONAL Part # B2012 Needle Bearing; Bore=1.25", Outer Diameter=1.5", Width=0.75"
    Front Axle; Mitsubishi IFS 8" R.G.
    1986 : DODGE : POWER RAM 50 : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Brake/Wheel Hub : Spindle Bearing NATIONAL Part # B2012 Needle Bearing; Bore=1.25", Outer Diameter=1.5", Width=0.75"
    Front Axle; Mitsubishi IFS 7.25" R.G.

    1992 : MITSUBISHI : MONTERO : 3.0L 2972cc 181 cubic inch V6 MFI (S) SOHC : Brake/Wheel Hub : Spindle Hub SealNATIONAL Part # 710146 Oil Seal; Nitrile Seal, Shaft Size=2.205", Housing Bore=2.992, Outer Diameter=2.988, Flange Outer Diameter=3.209", Width=0.472in
    Front Axle; Mitsubishi IFS 8" R.G.
    1986 : DODGE : POWER RAM 50 : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Brake/Wheel Hub : Spindle Hub SealNATIONAL Part # 710146 Oil Seal; Nitrile Seal, Shaft Size=2.205", Housing Bore=2.992, Outer Diameter=2.988, Flange Outer Diameter=3.209", Width=0.472in
    Front Axle; Mitsubishi IFS 7.25" R.G.


    1992 : MITSUBISHI : MONTERO : 3.0L 2972cc 181 cubic inch V6 MFI (S) SOHC : Suspension : Ball Joint MEVOTECH Part # MK9009 {#K9009} Suspension Ball Joint
    4WD; Front Lower
    1986 : MITSUBISHI : MIGHTY MAX : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Suspension : Ball Joint MEVOTECH Part # MK9009 {#K9009} Suspension Ball Joint
    4WD; Front Lower
    ~~~~~~~1986 Dodge Ram 50 4x4 list different lower ball joint~~~~~~~~~~~
    1987 DODGE RAM 50 CUSTOM 2.6L 2555cc 156cid L4 2BBL (E) SOHC : Suspension : Ball JointMEVOTECH Part # MK9009 {#K9009} Suspension Ball Joint
    4WD; Front Lower
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~
    Upper ball joint on both 86 and 87 mighty max and dodge ram 50 show different part#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~
    1992 : MITSUBISHI : MONTERO : 3.0L 2972cc 181 cubic inch V6 MFI (S) SOHC : Drivetrain : Universal Joint
    FEDERATED Part # 398 Front Shaft at Front Axle; 4WD Front Shaft at Transfer Case; 4WD
    1986 : MITSUBISHI : MIGHTY MAX SPX : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Drivetrain : Universal Joint
    FEDERATED Part # 398 Front Shaft at Front Axle; 4WD Front Shaft at Transfer Case; 4WD
    1986 : DODGE : RAM 50 CUSTOM : 2.6L 2555cc 156 cubic inch L4 2BBL (E) SOHC : Drivetrain : Universal Joint
    FEDERATED Part # 398 Front Shaft at Front Axle; 4WD Front Shaft at Transfer Case; 4WD

    Mighty Max/Ram 50 4x4

    91 Montero


    There IS MORE reseach to do, so don't jump the gun and blame me.
    Will the 91/92 Montero spindle/knuckle fit the 1st. gen 4x4 trucks?
    Last edited by Rickdees; 08-31-2011 at 01:11 PM.

  6. #6

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    The 4X4 rotors have a different offset compared to the 4X2,when you bolt the rotors to the hub there is not enough room for the caliper bracket to fit between the rotor and spindle.
    Last edited by Rahtid; 09-02-2011 at 08:35 AM.

  7. #7

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    Quote Originally Posted by Rahtid View Post
    The 4X4 rotors have a different offset compared to the 4X2,when you bolt the rotors to the hub there is not enough room for the caliper bracket to fit between the rotor and spindle.
    So the 4x4 hub assembly will fit the 4x2 spindle? Do the 4x4 rotors fit the 4x2 hub? What year/model 4x4 rotors did u try?

  8. #8

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    The 4x4 has to be drilled to fit the 4X2 hub, but there still the wrong offset, once you tighten the nut on the spindle the rotors wont move it's hitting the back of the spindle

  9. #9


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    A member on here has 2 piston front calipers. Anyone has the part numbers for the rotor/caliper/caliper bracket?

    Looking to do the upgrade if it bolts to my 89 4x2 mightymax. Why make a new thread when a thread exists for bigger rotors.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

  10. #10



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    Those calipers are from a montero 2nd gen I think
    Pennyman1
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    Living the D-50 lifestyle since 1980

  11. #11

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    92 mitsubishi montero front calipers

  12. #12


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    Thanks. So do I have to replace the rotor as well? Caliper brackets as well as caliper.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

  13. #13

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    the montero caliper will work with stock rotor and you will notice a big difference in how well the truck stop,the problem is the stock rotor is too small for the montero brake pads, it sticks out about .25 of an inch.I am still trying out different rotors from every 6 lug application, I havent given up, just been busy my racing season started in january, as im typing this im coming back from Gainesville Florida

    Here are videos from january http://www.youtube.com/watch?v=vPnFq9E4SKM
    http://www.youtube.com/watch?v=QkgdB...eature=related

  14. #14


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    Still waiting on an update to this thread.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

  15. #15

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    Still working on it

  16. #16

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    Quote Originally Posted by Rahtid View Post
    Still working on it
    I've got a hold of the Montero aka Pajero over here calipers and am looking for some rotors to match. Bolted the calipers up the other day, but wasn't happy with the rotor being too small and pads sticking out. Bolts straight up just needs the backing plate shield slightly modified to clear the carrier. Bolt pattern and thread is the same though.




    The disc on the Montero that the caliper came from is 276mm outer diameter, so I am looking for a disc at least 270mm in diameter, not much more than 276mm, but with similar rotor thickness offset etc.
    I've spent a good hour crunching numbers in an Aussie disc brake supplier book with all dimensions supplied. Closest I've found so far is: (all in millimetres)



    Mighty Max 2WD Ford Econovan Daihatsu Feroza Merc W168 A190
    aka Triton 1400/1600/2200 1981-1984 1988 onwards 1999-2004
    A 258 A 275 A 277 A 276
    B 33.5 B 33 B 33 B 35.5
    C 22 C 20 C 18 C 22
    E 84 E 85 E 96 E 67


    I'd love to get a set of the Econovan ones to try, gonna have a look around for used before I buy a brand new set of slotted ones. Only problem is I could not find ANY 6 stud rotors, all the ones I found that were close would need re-drilling to suit. My pick is the Ford Econovan which is 4 stud, Merc & Daihatsu are 5 stud. Econo discs with only 4 holes would give more room to fit 6 re-drilled in the correct position for our trucks, the centre hole diameter is only 1mm larger (hopefully shouldn't matter), thickness is 2mm less which shouldn't matter, offset is .5mm difference which shouldn't matter, and total diameter is only 1mm less than the correct size for the caliper.


    I will let everyone know for sure if I find anything.

  17. #17

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    The dimensions didn't show up correctly above, and can't find the edit button. So here I go again

    Our trucks 258mm OD, 33.5mm height, 22mm thickness, 84mm centre hole diameter
    Econovan 275mm OD, 33mm height, 20mm thickness, 85mm centre hole diameter (all pretty close)
    Feroza 277mm OD, 33mm height, 18mm thickness, 96mm centre hole diameter (too big?)
    Merc 276mm OD, 35.5mm height, 22mm thickness, 67mm centre hole (would need boring out to 84mm)

  18. #18

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    Just gotta get a set and see if possible to re-drill and bolt on. Here's hoping it works as simply as I expect it to

  19. #19

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    Alright so just noticed a flaw in my hard work. Didn't take into account the mounting point of the caliper I totally overlooked the fact that only 5mm of pad is left showing therefore I only need a 10mm bigger diameter rotor, I was assuming it was bolted on in the exact same spot relative to the centre of the axle as when it was on the Montero, when the fact is it must be slightly closer to the axle if only 5mm of the pad is showing.




    Start all over again

  20. #20

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    Ok, so cannot find anything as close as that Econovan rotor in 270ish size. I've done some rough estimation and found that with the 258mm rotor roughly 6mm of pad is un-used on the Montero caliper, so therefore I need a 12ish mm larger diameter disc for the outside of the pads to be exactly in line with the outside of the rotor. There's 270 there, but if I go with the 276 that I found, it's only 6ish mm bigger that needed, therefore only 3mm on the outside of the rotor surface will be un-used, and I'm certain I have enough room for the caliper to clear the outside of the disc being 3mm too big in diamter. I'd rather have too much disc than what I would have at the moment not using the whole pad. Disc might wear a little like ][ with the un-used section on the outside, but hey rotors are cheap and they don't wear in a hurry Gonna give it a go.

  21. #21



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    Run it... It will give you some strange pad wear but it should stop just fine.
    Members come and members go, But the board keeps track of them.
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  22. #22

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    it will stop a whole lot better than the stock calipers,I ran this setup for over 2 years before i posted it on this forum

  23. #23

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    Ive been looking for bigger rotors from different vehicles as well. Hoping to find something close enough to have few modifications. looks like 2011 chevy colorado has the rotors bolted to the hub in the same way but i havent found out if they will fit. I did grab a rotor and hub from a honda passport/ isuzu rodeo. didnt look like they would mount up easily.

  24. #24

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    do you have pictures of the rotor and hub from the rodeo

  25. #25

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    Quote Originally Posted by Rahtid View Post
    do you have pictures of the rotor and hub from the rodeo
    I think it was a 97 but theyre pretty similar for several years. It was a 2wd model. The rotor is just a bit larger in diameter than the montero but way larger then the max. The bearings are much larger so I was hoping to get different bearings or spacers to make it fit the mitsu spindle. Unfortunately the tabs on the front of the hub ( the ones that make us have to bore out chevy wheels to fit ) are even larger on the rodeo. I think the mitsu was around 93 mm and the rodeo was 99mm.
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