The Shimano RT900 has a larger adapter between the braking surface and cooling fins. This improves the heat dissipation from the disc surface by a further 40 ° C compared to the Ice Tech brake discs. The SM-RT900 brake disc was specially designed by Shimano for the Dura Ace BR-R9170 disc brake, but it is also compatible with other flat mount and even MTB brakes.

- Spider painted, disc polished, lockring anodized (internal toothing)
- for brake pads with a narrow pad shape
- Material: sandwich composite made of polished stainless steel on the outside with an aluminum core
- Size: 140mm
- Weight according to the manufacturer: 100g

- Brake compatibility:
BR-M9100, BR-M9120, BR-M9110-R, BR-M9000, BR-M9020, BR-M8100, BR-M8120, BR-M8110-R, BR-M8000, BR-M8020, BR-M7100, BR- M7120, BR-M7110-R, BR-M7000, BR-M6100, BR-M6120, BR-M6000, BR-MT520, BR-MT420, BR-M820, BR-M640, BR-S7000, BR-S700, BR- R9170, BR-R8070, BR-R7070, BR-RS805, BR-R785, BR-RS785, BR-RS505, BR-RS405, BR-RX810, BR-RX400

Brake pad compatibility:
- sintered (with BR-S700 and BR-S7000 only organic)
- organic

Scope of delivery:
- 1 x Shimano SM-RT900 brake disc
- 1 x lock ring

(Translated with Google Translate)