SHIMANO SM-RT81 Disc Rotor


SIZE: 140mm
TYPE: Center Lock
Sale price$30.00

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Shimano's SM-RT81 brake rotors offer very high braking performance thanks to Ice Technology. The risk of fade is considerably reduced because the temperatures generated during braking are significantly lowered with this technology.

SM-RT81 brake rotors are compatible with many MTB, road, and city disc brakes.


Model No. : SM-RT81
Series : SHIMANO DEORE XT M8000 Series
Outside diameter : 140mm* / 160mm / 180mm / 203mm
Average weight : 173.0 g (203 mm) 149.0 g (180 mm) 122.0 g (160 mm) 100.5 g (140 mm)
Center Lock
Aluminum Lock Ring
Compatible Pads : Metal / Resin

  1. We ship within 1-2 business days after receiving your order (payment). (Basically, orders placed before 12:00 p.m. are shipped the same day.)
  2. Messenger delivery is available within Nagoya City only.
  3. We ship every day from Monday to Sunday, except for temporary holidays.
  4. Available delivery areas: All over Japan and the world.
  5. Please note that delivery may be delayed due to credit card processing status. If you would like to specify the delivery date and time, please fill in your request in the additional information in the shopping cart.
  6. The product will be shipped from Circles.
  7. Please contact the shipping company in case of damage or loss during shipping.

Regarding the delivery of completed vehicles

  • Please note that a separate shipping fee of 6,600 yen (including tax) will be charged for shipping a completed vehicle.
  • After receiving your order, we will perform a final check and ship the completed car, but it may take 1-2 weeks. Please understand.
  • Some parts of the bike will be removed for packing. We strongly recommend that you have your bicycle assembled at your nearest bicycle store.
  • We will inform you of the delivery date and other details by e-mail.
  • We apologize for any sales discrepancies at the store.

Regarding the delivery of frame sets

  • Nationwide flat-rate shipping: 3,300 yen (tax included) (However, an additional fee will be charged for delivery to Okinawa and remote islands.)
  • We will inform you of the delivery date and other details by e-mail.
  • We will provide the pre-treatment of facing and tapping for the frame sets purchased at our store as a service. We will inform you separately after purchase.
  • We can also install a headset and BB for a fee, so please feel free to contact us.

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