Shimano RT-EM300 Front Rotor
What the checker says27will not fit
Run variant by variant through the e-MTB builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 475 verified e-MTB parts in this catalog. 464 produced no finding of any kind; that is RT-EM300 203mm (Center Lock, Speed Sensor). RT-EM300 160mm (Center Lock, Speed Sensor) clears 448. Each variant produces 1 to 17 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · Front WheelFront rotor interface mismatch: Center Lock rotor on 6-bolt front hub - no adapter exists for this direction. On 11 of the 24 verified front wheels in this catalog. Applies to all 3 variants.
Emtb front rotor, Fork. 26 more findings from the same check, on up to 1 of the 19 verified forks each.
Open a variant in the builder to see the ones that apply to your own parts.
$22.00 to $28.00 MSRP
What the maker states
- Size
- 160 mm rotor (on 1 of 3 variants); 180 mm rotor (on 1 of 3 variants); 203 mm rotor (on 1 of 3 variants)
- Mount
- Center Lock
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
3 verified variants
| Variant | Size | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| RT-EM300 203mm (Center Lock, Speed Sensor) | 203 mm rotor | $28.00 | not stated | maker’s page | 2026-08-20 | Build with this |
| RT-EM300 180mm (Center Lock, Speed Sensor) | 180 mm rotor | $25.00 | not stated | maker’s page | 2026-08-20 | Build with this |
| RT-EM300 160mm (Center Lock, Speed Sensor) | 160 mm rotor | $22.00 | not stated | maker’s page | 2026-08-20 | Build with this |
Source
Source: each variant links the maker’s own page in the table above. Last checked 2026-08-20.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 9point8 Fall Line 30.9 / 125mm (INLINE) (Dropper Post) No conflicts found
- BikeYoke Divine 2.0 Dropper Post 31.6 / 125mm (Dropper Post) No conflicts found
- BikeYoke Divine SL Dropper Post 30.9 / 80mm (Dropper Post) No conflicts found
- BikeYoke Divine SL Rascal Dropper Post 30.9 / 80mm (Dropper Post) No conflicts found
- BikeYoke Revive 3.0 Dropper Post 30.9 / 125mm (Dropper Post) No conflicts found
- BikeYoke Revive Max 3.0 (34.9) Silver Ltd. Dropper Post 34.9 / 125mm (Dropper Post) No conflicts found
6 of 266 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.