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Shimano XT RT81 Icetech Centerlock Rotor

Item #: BR247L00
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Shimano XT RT81 Icetech Centerlock Rotor

Shimano XT RT81 Ice-Tech Centerlock Rotor

Shimano’s RT81 rotors embody Shimano's signature Ice-Tech Technology. Ice-Tech produces 25% more braking power through achieving a high system stiffness and incredible cooling power. The 3 layer rotor features an aluminum core between stainless steel outer plates. This configuation quickly and efficiently dissipates heat from the exterior, drawing it away to cool into the atmosphere using the aluminum carriers and cutout winged design. With better heat dissipation, there is more consistent braking power.

  • Centerlock Rotors mount on Centerlock hubs only (SM-RT96 lockring for QR and 12mm hubs included, HB20 lockring is required for 15mm and 20mm thru-axle hubs, sold separately). Will not fit on standard 6-bolt hubs.
  • Floating arrangement delivers excellent stiffness properties, low weight, great brake feel and incredible heat dissipation
  • Ice-Tech heat-shedding technology ensures consistent, predictable braking.
  •  Mud- Shedding Design is ready for the roughest conditions
4.7 / 5.0
56 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
41
11
4
0
0
Great Expensive Rotors
Been using the Shimano RT64 SLX rotors with SLX brakes for this past summer and braking was fine. The Ice-Techs are true out of the box, great stopping power and better modulation. Highly recommend them if money is not an issue. They work with allmodern Shimano brakes, M615 Deore, M675 SLX, M785 XT, XTR, ZEE.People also installed them with Avid and Hayes brakes.

PROS: Lightweight, Great Stopping Power, Easy To Install, Sturdy Design
November 25, 2014
Location:
Toronto, ON
Stopping Power
Good rotors, good price. 180mm rotors just fit on my Turner bike and provide excellent stopping power for this Clydesdale rider! :)

PROS: Handles Elements Well, Sturdy Design, Easy To Install, Great Stopping Power
July 31, 2014
Location:
Redlands, CA
Shimano brakes = pure bliss
Theres not much to say about shimano brakes except they rule. To get the benefits of this rotor you need shimano brakes with ice tech pads. When paired these discs are powerful,fade free, and quiet as a mouse in all conditions in any scenario. Gave 4 star cuz i havent tried the RT99 rotors.

PROS: Easy To Install, Fade- Free, Handles Elements Well, Great Stopping Power

BEST USES: Dh, Aggressive Trail, Mountain Biking
October 22, 2014
Location:
Riverside, Ca
love it dont bend like the 6 bolt
it comes with matching black centerlock

PROS: Great Stopping Power, Sturdy Design, Lightweight, Easy To Install

BEST USES: Wet Conditions, Road Biking, Mountain Biking
November 25, 2015
Location:
canton ohio
RT81 rotor
Order showed up fairly fast but I'm in NorCal so not too far from Jenson.

PROS: Easy To Install
August 5, 2014
Location:
Mtn View, CA
Rotor
smooth braking, rotor runs true and flat. Great stopping power when descending Mt. Mitchell!
May 2, 2017
Purchased
7 months ago
Great discs!
Easy install, stops on a dime. Shimano got it right using the same tool to mount a cassette for mounting the disc.
February 27, 2017
Purchased
5 months ago
Location:
Baton Rouge, LA
Lovely rotors for those in need of a brake.
You have to stay on top of brake maintenance! Check them before every ride and before big descents. Put on new pads before they wear out. If the pads wear down on a ride the rotor will be quickly ruined. Then you will have to buy one of these prematurely. Luckily Jenson is there typically with parts in stock, at the best price, ready to fulfill our orders quickly and reliably to save the next ride. The Shimano Ice Tech rotors I have ordered have all arrived straight and true, conscientiously packaged, and in a timely manner. One nice fact about the Shimano rotors are that they come with fresh prepared bolts, if they aren't center-fire type (double check to make sure you ordered the right ones!!!) and special locking washers for secure fitment. I have been successfully using these with Magura calipers for many years. These are better than the excellent Magura Storm rotors. That's high praise for Shimano right there. Easier than fixing a flat, rotor changing time is a pleasure. Take stock and be thankful for the many happy brakes in the miles behind you.
June 2, 2017
Purchased
1 month ago
Location:
Bay Area, California
Ice Tech rotors
Bought these for my 2017 Pivot Mach429tr. They work very well with my set up couldnt be happier. Shipping was fast
April 12, 2017
Purchased
3 months ago
Location:
Phoenix,Az
Great stopping power w less noise
As described ice tech doesn't overheat as much as my previous rotors so less screeching when descending long hills like GMR and crystal lake.
July 1, 2017
Purchased
1 month ago
Location:
Chino

Q & A

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Browse 6 questions Browse 6 questions and 16 answers
Will these rotors work with a 15mm frnt. axle and 12x142 rear axle?
Sean on Apr 16, 2016
Do these come with the Lock Ring for a 15mm hub?
t on Aug 10, 2016
BEST ANSWER: A lockring is included, but it will not fit a 15mm hub. You will need to purchase the HB20 lockring.
Shimano HB20 15/20mm Rotor Lockring
Shimano HB20 15/20mm Rotor Lockring
With this rotor fit the XTR M988 Trail MTB Disc Wheelset? The wheelset is 15mm from and normal skewer in the back. if so with they fit as is or will they need an different lockring?
Daniel F on Feb 13, 2017
Shimano XT RT81 Icetech Centerlock Rotor
Shimano XT RT81 Icetech Centerlock Rotor
Shimano SM-RT64 Rotor
Shimano SM-RT64 Rotor
Shimano RT30 Centerlock Rotor
Shimano RT30 Centerlock Rotor
Shimano RT99 Freeza Centerlock Rotor
Shimano RT99 Freeza Centerlock Rotor
Shimano SM-RT54 Centerlock Rotor
Shimano SM-RT54 Centerlock Rotor
Shimano SLX RT67 Disc Brake Rotor
Shimano SLX RT67 Disc Brake Rotor
BEST ANSWER: Yes this rotor fits Shimano centerlock hubs. The lockring that comes with this rotor will fit the rear hub. The 15mm front hub will need the locking that uses the external bottom bracket tool to install; the Shimano HB-20 one. The type of lockring that uses the cassette tool to install will not fit over the axle.
does this rotor come with the lockring?
A shopper on Apr 3, 2017
BEST ANSWER: Yes, it includes an SM-RT96 Lockring. This is the smaller lockring that installs on QR or 12mm axle rear hubs with the cassette lockring tool (like the Park FR-5).

If you are using thru-axle hubs 15mm and up, you will require the SM-HB20 lockring (attached) that has clearance for 15 or 20mm thru-axles, that installs using the external BB tool (like the Park BBT-9).
Shimano HB20 15/20mm Rotor Lockring
Shimano HB20 15/20mm Rotor Lockring
Do the rotors come with a lock ring?
Dan on Jun 20, 2016
BEST ANSWER: Yeah, they should work with that set up. They are individually sold.
is this individual or for as a set?
MarkO on Apr 14, 2016
BEST ANSWER: Just one rotor.

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.