A while back I took a survey on TR3 brake calipers and lining material.
It seems that all but a couple of us are running later TR4-6(early)
brake calipers on TR3s. It seems like the primary advantages of the
later calipers are less weight and a better selection of brake pads
off-the-shelf. I've now got everything I need to convert mine.
However, when comparing the two, I noticed the early pads have a larger
surface area (maybe 20% larger). Wouldn't this be an advantage for the
early calipers? I've had no problems with brakes since switching to a
better lining material, so now I'm wondering is this a case of - "if it
ain't broke, don't fix it".
Larry Young
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