Originally Posted by
colotandem
I don't know if akexpress said that the Hope Ventilated Rotor fits on the TRP HY/RD. I think he said that it works with a Hope two piece rotor. I am not sure that those are one in the same.
Excellent point. Hope has three types of rotors.
According to Hope's terminolgy, these are from Left to Right, Fixed, Floating and Vented.
This is
explained here. The Floating is indeed the two part, not the Vented.
Originally Posted by Hope Tech
TO AVOID ANY PERMANENT DEFORMATION EVEN UNDER
THE MOST SEVERE CONDITIONS A FLOATING DISC IS
CONSTRUCTED IN TWO PARTS. AN ALUMINIUM CENTRE PART
CARRIER WHICH IS FIXED TO THE HUB AND A STAINLESS
ROTOR PART IN CONTACT WITH THE BRAKE PADS.
Since the Hope puts only stainless steel in contact with brake parts, it isn't going to melt so easily as the IceTech, which has aluminum (
melting temp 1220 F) sandwiched between steel (2750 F). I don't see how Shimano gets past the considerably different coefficients of thermal expansion of aluminum and steel in this configuration,
22.2 and 13 (10-6 m/m K) *) respectively.
Interestingly, the
Hope 203 mm floating rotor has the same
weight as the IceTech, 169 grams.
Too bad no one makes a magnesium carrier rotor in 203 mm, such as
Scrub does in 160 mm.
