e*thirteen Sidekick GR Rear MTB Hub Rear Hub
What the checker says129will not fit
Run variant by variant through the mountain bike 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 6050 verified mountain bike parts in this catalog. 5925 produced no finding of any kind; that is Sidekick GR Rear MTB Hub (Boost148, HG). Sidekick GR Rear MTB Hub (SuperBoost157, Microspline) clears 5701. Each variant produces 35 to 52 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · FrameRear axle mismatch: Frame is Boost 148x12 but Rear wheel hub is SuperBoost 157x12. On 228 of the 258 verified frames in this catalog. Applies to 3 of 6 variants.
- Will not fiterror · Rear RotorRear rotor interface mismatch: Center Lock rotor on 6-bolt rear hub - no adapter exists for this direction. On 65 of the 177 verified rotors in this catalog. Applies to all 6 variants.
- Will not fiterror · FrameRear axle mismatch: Frame is SuperBoost 157x12 but Rear wheel hub is Boost 148x12. On 21 of the 258 verified frames in this catalog. Applies to 3 of 6 variants.
- Will not fiterror · FrameRear axle mismatch: Frame is 135x5-qr but Rear wheel hub is Boost 148x12. On 5 of the 258 verified frames in this catalog. Applies to 3 of 6 variants.
- Will not fiterror · FrameRear axle mismatch: Frame is 135x5-qr but Rear wheel hub is SuperBoost 157x12. On 5 of the 258 verified frames in this catalog. Applies to 3 of 6 variants.
Freehub, Cassette. 120 more findings from the same check, on up to 1 of the 60 verified cassettes each.
Rear axle, Frame. 4 more findings from the same check, on up to 2 of the 258 verified frames each.
Open a variant in the builder to see the ones that apply to your own parts.
$399.95 MSRP·424 to 443 g
What the maker states
- Freehub
- / driver Shimano HG (on 2 of 6 variants); / driver Shimano Micro Spline (on 2 of 6 variants); / driver SRAM XD (on 2 of 6 variants)
- Rotor mount
- 6-bolt
- Hub
- Spacing Boost 148x12 (on 3 of 6 variants); Spacing SuperBoost 157x12 (on 3 of 6 variants)
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
6 verified variants
| Variant | Freehub | Hub | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|---|
| Sidekick GR Rear MTB Hub (Boost148, XD) | / driver SRAM XD | spacing Boost 148x12 | $399.95 | 424 g | maker’s page | 2026-09-08 | Build with this |
| Sidekick GR Rear MTB Hub (Boost148, Microspline) | / driver Shimano Micro Spline | spacing Boost 148x12 | $399.95 | 429 g | maker’s page | 2026-09-08 | Build with this |
| Sidekick GR Rear MTB Hub (Boost148, HG) | / driver Shimano HG | spacing Boost 148x12 | $399.95 | 435 g | maker’s page | 2026-09-08 | Build with this |
| Sidekick GR Rear MTB Hub (SuperBoost157, XD) | / driver SRAM XD | spacing SuperBoost 157x12 | $399.95 | 432 g | maker’s page | 2026-09-08 | Build with this |
| Sidekick GR Rear MTB Hub (SuperBoost157, Microspline) | / driver Shimano Micro Spline | spacing SuperBoost 157x12 | $399.95 | 437 g | maker’s page | 2026-09-08 | Build with this |
| Sidekick GR Rear MTB Hub (SuperBoost157, HG) | / driver Shimano HG | spacing SuperBoost 157x12 | $399.95 | 443 g | maker’s page | 2026-09-08 | Build with this |
The rest of what the maker states1 not published
1 further field the checker looks for is not published by e*thirteen, so we leave it blank rather than estimate it, and that check stays silent on this rear hub. It is maximum system weight. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-09-08.
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.
- 5DEV R-SPEC Trail/Enduro Cranks (Crankset) No conflicts found
- 9point8 Fall Line (Dropper Post) No conflicts found
- 9point8 Stout (31.8, 30mm) (Stem) No conflicts found
- ACID SLX 30 front (Front Wheel) No conflicts found
- ACID SLX 30 rear (Rear Wheel) No conflicts found
- Acros ZS44/ZS56 (Headset) No conflicts found
6 of 1879 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.