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Shimano Rotor 180mm Center Lock Ext.rt-em810 Icetechfreeza W/lring
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Shimano RT-EM810 Ice Tech Freeza Centerlock rotor, 180 mm, with built-in e-bike speed sensor magnet (IRTEM810ME).
- Cooling fins for heat control
- External lockring included
- Recommended for 4-piston XTR / XT / SLX brakes
The Shimano RT-EM810 is a 180 mm Centerlock disc rotor made for Shimano e-bike systems: the speed-sensor magnet is built into the rotor, so there is no separate spoke magnet to knock out of place.
Ice Tech Freeza construction with cooling fins pulls heat away from the braking surface — exactly what a heavier e-bike needs on long descents. Shimano recommends it with its XTR, Deore XT and SLX 4-piston brakes.
Check these before you order
- Centerlock hubs only; external-serration lockring included.
- Made for Shimano e-bike systems that read speed from the rotor — ask us if you are unsure which sensor your bike uses.
- Size: 180 mm. Your frame or fork (or caliper adapter) must be set up for 180 mm.
- Recommended calipers: BR-M9120, BR-M8120, BR-M7120.
Who it is for
- Shimano-powered e-MTB and e-trekking riders replacing a 180 mm rotor
- Heavier riders or bikes that need extra heat control
- Upgrading from a standard rotor on a Shimano e-bike
Full specifications are listed in the Information tab.
Not published for this exact code on the pages we checked: minimum rotor thickness (it is stamped on the rotor).
Questions people ask
Does it work on a non-electric bike?
It is a normal Centerlock rotor, so yes; the built-in magnet simply goes unused.
Which brakes does Shimano recommend?
4-piston XTR BR-M9120, Deore XT BR-M8120 and SLX BR-M7120.
What does it weigh?
Shimano’s figure is 140 g for 180 mm.
What is the Shimano code?
IRTEM810ME, EAN 4550170445416.
Talk to us
| Weight | 0.20 kg |
|---|---|
| Dimensions | 20 × 20 × 3 cm |
| Brand | Shimano |
| Discipline | MTB |
| Product Type | Disc brake rotor |
| Model Code | RT-EM810 |
| Rotor Size | 180 mm |
| Mount | Centerlock |
| Lockring | Included, external serration |
| Technology | Ice Tech Freeza |
| E-Bike Feature | Built-in speed sensor magnet |
| Recommended Calipers | BR-M9120, BR-M8120, BR-M7120 |
| Reference Weight | 140 g (Shimano figure, 180 mm) |
| Manufacturer Code | IRTEM810ME |
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