Shimano GRX RT-CL800 S - 180mm | Center Lock
What Is the Shimano GRX RT-CL800 180mm Rotor Designed For?
The RT-CL800-S 180mm is the largest size in Shimano's GRX rotor lineup, intended for gravel and adventure riders who need maximum braking surface area for heavy loads, long descents, or demanding terrain. At 180mm, this rotor requires a frame or fork with a 180mm direct-mount centerlock caliper position or a compatible adapter to raise a 160mm-position caliper to clear the larger diameter. The rotor uses the same ICE Technologies Freeza construction as the rest of the RT-CL800 family, combining a three-layer bonded aluminum and stainless steel core with Freeza cooling fins on the rotor body to dissipate heat rapidly during sustained braking. The larger diameter increases both mechanical braking advantage and thermal mass, which is meaningful on long descents under load.
Shimano designed the RT-CL800 series specifically for the GRX hydraulic caliper lineup, but the rotor is compatible with any Shimano hydraulic caliper that accepts 180mm centerlock rotors. The centerlock interface is standard Shimano spec, and a lockring is included for installation. This size is less common than 160mm and is typically chosen by riders on heavy gravel setups, bikepacking builds with full loads, or those who have experienced heat fade at 160mm and need the extra thermal headroom. For high-output gravel applications where braking demands exceed what a 160mm setup can handle comfortably, the RT-CL800 180mm delivers the additional stopping power and heat management the situation requires.
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Shimano GRX RT-CL800 S - 180mm | Center Lock
Shimano GRX RT-CL800 S - 180mm | Center Lock
What Is the Shimano GRX RT-CL800 180mm Rotor Designed For?
The RT-CL800-S 180mm is the largest size in Shimano's GRX rotor lineup, intended for gravel and adventure riders who need maximum braking surface area for heavy loads, long descents, or demanding terrain. At 180mm, this rotor requires a frame or fork with a 180mm direct-mount centerlock caliper position or a compatible adapter to raise a 160mm-position caliper to clear the larger diameter. The rotor uses the same ICE Technologies Freeza construction as the rest of the RT-CL800 family, combining a three-layer bonded aluminum and stainless steel core with Freeza cooling fins on the rotor body to dissipate heat rapidly during sustained braking. The larger diameter increases both mechanical braking advantage and thermal mass, which is meaningful on long descents under load.
Shimano designed the RT-CL800 series specifically for the GRX hydraulic caliper lineup, but the rotor is compatible with any Shimano hydraulic caliper that accepts 180mm centerlock rotors. The centerlock interface is standard Shimano spec, and a lockring is included for installation. This size is less common than 160mm and is typically chosen by riders on heavy gravel setups, bikepacking builds with full loads, or those who have experienced heat fade at 160mm and need the extra thermal headroom. For high-output gravel applications where braking demands exceed what a 160mm setup can handle comfortably, the RT-CL800 180mm delivers the additional stopping power and heat management the situation requires.
Original: $63.99
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Description
What Is the Shimano GRX RT-CL800 180mm Rotor Designed For?
The RT-CL800-S 180mm is the largest size in Shimano's GRX rotor lineup, intended for gravel and adventure riders who need maximum braking surface area for heavy loads, long descents, or demanding terrain. At 180mm, this rotor requires a frame or fork with a 180mm direct-mount centerlock caliper position or a compatible adapter to raise a 160mm-position caliper to clear the larger diameter. The rotor uses the same ICE Technologies Freeza construction as the rest of the RT-CL800 family, combining a three-layer bonded aluminum and stainless steel core with Freeza cooling fins on the rotor body to dissipate heat rapidly during sustained braking. The larger diameter increases both mechanical braking advantage and thermal mass, which is meaningful on long descents under load.
Shimano designed the RT-CL800 series specifically for the GRX hydraulic caliper lineup, but the rotor is compatible with any Shimano hydraulic caliper that accepts 180mm centerlock rotors. The centerlock interface is standard Shimano spec, and a lockring is included for installation. This size is less common than 160mm and is typically chosen by riders on heavy gravel setups, bikepacking builds with full loads, or those who have experienced heat fade at 160mm and need the extra thermal headroom. For high-output gravel applications where braking demands exceed what a 160mm setup can handle comfortably, the RT-CL800 180mm delivers the additional stopping power and heat management the situation requires.
