Zoltan Sarosi wrote:
> Hi there,
>
> Does anybody know the minimum thickness of the shimano XT disc (SM-RT75 170mm)?
> I can't find it neither printed on the disc nor on the Internet.
> Can anyone help me?
>
> Regards Z
One of the former Shimano USA tech reps gave out the the number of .20
mm from the nominal width I believe.
This is based on the rotor not being out of true or scored, both of
which tend to end the life of a rotor long before a reduction in
thickness.
Also consider that, given the semi-industrial standard (there was one?)
of 2 mm, various rotors seem to run nominal widths of between 1.80 mm
and 2.2 mm. So knowing what the nomial width that you started with
would be key. Current Shimano rotors seem to be coming in at 2.0 mm,
but the older RT75's that I have listed were coming in at the low end
....1.8 mm.
Just for the fun of it here are a few numbers that we came up with
while doing some brake trials. small n ... 4 rotors measured for each
average.
Avid Stainless 1.9 mm
Aztec Stainless 2.0 mm
Shinamo SM-RT61 1.8 mm
Shimano SM-RT75 1.8 mm
Shimano SM-RT77 1.8 mm
Shimano SM-RT96 1.8 mm
Shakamuri Ti 2.0 mm
Stan's Al 2.1
R
