Shimano Deore XT SM-RT86 Disc Brake Rotor - 6-Bolt

Specifications

• MPN: SM-RT86
• Series: Shimano Deore XT (T8000 level)
• Technology: ICE Technologies
• Rotor Construction: 3-layer clad, stainless steel and aluminum and stainless steel
• Spider: Aluminum
• Mount: 6-bolt
• Sizes: 160mm, 180mm, 203mm
• Sold As: Individual rotor
• Approx Weight: 114g (160mm)
• Center Lock Compatible: No

Features

• ICE Technologies cooling for consistent braking and less fade
• 3-layer clad blade, stainless steel bonded to an aluminum core
• Aluminum spider dissipates heat and adds rigidity
• Mud-shedding blade design for clean braking in bad conditions
• Lightweight with strong heat resistance
• Less fade, less noise, and longer brake pad life

Sizing Guide

• 160mm: Cross country and lighter riders, or rear rotor on many trail bikes
• 180mm: All-around trail and enduro use, front or rear
• 203mm: Maximum stopping power for enduro, downhill, e-bikes, and heavier riders

Changing rotor size usually requires a matching brake caliper adapter. Confirm your frame, fork, and caliper mount before switching sizes.

FAQ

What is ICE Technologies?

ICE Technologies is Shimano's rotor cooling design. The braking surface is a sandwich of stainless steel outer layers bonded to an aluminum core, which pulls heat away from the braking surface. Lower temperatures mean less brake fade and longer pad and rotor life.

Is this rotor Center Lock or 6-bolt?

This is a 6-bolt rotor. It mounts to any 6-bolt hub using the standard bolt pattern and is not compatible with Center Lock hubs. Mounting bolts are typically included with the rotor.

Do I need a new adapter if I change rotor size?

Often, yes. Brake calipers are positioned for a specific rotor diameter, so going from 160mm to 180mm or 203mm usually requires a matching mount adapter. Check your frame and fork specs before changing size.

Is the rotor sold individually or as a pair?

Each SM-RT86 rotor is sold individually. If you are replacing both front and rear, or setting up a new bike, you will need to order the correct size for each wheel separately.

Best For

Trail, enduro, all-mountain, and e-bike riders who want XT-level braking that stays consistent on long, hot descents. The SM-RT86 is the proven upgrade over basic rotors for anyone who values reliable stopping power, quiet operation, and longer pad life in demanding conditions.