Shimano SM-RT66 Front Rotor
What the checker says27will not fit1check before you buy
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. 465 produced no finding of any kind; that is SM-RT66 203mm (6-Bolt). SM-RT66 160mm (6-Bolt) clears 449. Each variant produces 1 to 17 distinct errors and 0 to 1 distinct warnings.
Will not fit
- Will not fiterror · Front WheelFront rotor: a 6-bolt rotor does not mount on a Center Lock front hub as it is - the two use different rotor interfaces. The part that bridges them is a Center Lock adapter, and the ones makers publish fit one-piece rotors only. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 10 of the 24 verified front wheels in this catalog. Applies to all 4 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.
Check before you buy
- Check before you buywarning · ForkFront rotor: 220mm exceeds the fork max of 203mm. On 1 of the 19 verified forks in this catalog. Applies to 1 of 4 variants.
$19.00 to $32.00 MSRP
What the maker states
- Size
- 160 mm rotor (on 1 of 4 variants); 180 mm rotor (on 1 of 4 variants); 203 mm rotor (on 1 of 4 variants); 220 mm rotor (on 1 of 4 variants)
- Mount
- 6-bolt
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
4 verified variants
| Variant | Size | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| SM-RT66 160mm (6-Bolt) | 160 mm rotor | $19.00 | not stated | maker’s page | 2026-07-30 | Build with this |
| SM-RT66 180mm (6-Bolt) | 180 mm rotor | $22.00 | not stated | maker’s page | 2026-07-30 | Build with this |
| SM-RT66 203mm (6-Bolt) | 203 mm rotor | $26.00 | not stated | maker’s page | 2026-07-30 | Build with this |
| SM-RT66 220mm (6-Bolt) | 220 mm rotor | $32.00 | not stated | maker’s page | 2026-07-30 | Build with this |
Source
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-30.
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.