I had purchased a ej1 with a rear disc swap already done and I'm going to change the pads and rotors yesterday to realize that the rear isn't a 4x100 but a 4x114.3, I was confused due to the fact that It does has rear integra calipers but different hub I'm assuming? I can't tell what size rotor I need now and I been trying to look everywhere for a rotor or at least closest match to the 239mm rear rotor the integra calipers need but in 114.3. This is the first I've ever seen someone do this and I've gone hours online trying to see if anyone has done this so I could find a answer but no luck. Any help is greatly appreciated from how to figure out what rotor I need to recommendations on what to do.

Side note: I know I can redrill but I'm tight on cash now for me to take it to a shop and the rotors it has now aren't redrilled so there must be a rotor I can use?

 

if it is 4x114.3 my first guess is the 1996 integra type r

 

Not positive, but I think 90-93 Accord rear rotors will fit.

 

Well the oem size for integra rears are the 239mm diameter and 48.2 overall height.

So I been looking at alternatives but first I'm not sure if it's possible or just plain dumb but if someone could tell me a definite answer to this I'd appreciate it. Can I use different size rotors or will it totally affect the braking or just not fit etc.

There's the 98 4cyl Accord sedan with 259.8 diameter and 48.2 overall height

I'm still looking for more options but so far that's as close to spec as I've found so far

 

If you get a bigger rotor, how do you expect your caliper bracket to go back on?

If you get a smaller rotor, what do you think your pads will look like in 5k miles?

 

Yeah I figured I can't go anything but oem size. I'm just thinking desperately here due to it being my daily and not wanting to ride on a worn down rotor. I was thinking best bet is to measure the current rotor and look up the specs and see if I get a hit, any other possible suggestions you could possibly give? Thank you by the way.

 

I just checked....


USDM ITR 5x114.3 Rear rotors are
Outside Diameter (mm): 259.08
Overall Height from Center (mm): 47.75
Nominal (New) Brake Surface Thickness (mm): 9


The 90-93 Accord has
Outside Diameter (mm): 259.59
Overall Height from Center (mm): 48.51
Nominal (New) Brake Surface Thickness (mm): 10

98 Accord:
Outside Diameter (mm): 259.08
Overall Height from Center (mm): 47.75
Nominal (New) Brake Surface Thickness (mm): 9



If the JDM and USDM ITR rotors have the same specs, then it would appear that you were correct with the 98 Accord.