Bird Aether 9 AL specification and geometry
Bought in February 2021 but not out on the trails until March, this is the specification and geometry of my Bird Aether 9 full suspension mountain bike.
This bike has turned out to be a great purchase, which deserves review of its own. There are a couple of areas of the specification I might tweak but nothing – apart from deeper pockets – that stops it being an absolute pleasure to ride right out of the box.
If you want a Bird Aether 9 of your own, find it on the Bird Bikes website.
| Colour | Tungsten Grey |
|---|---|
| Frame | Aether 9 6066-T6 aluminium frame 130mm travel, 12x148mm bolt thru rear axle, clearance for 29×2.6 tyres, ISCG05 chainguide mount, full continuous external cable routing |
| Fork | RockShox Pike RCT3 140mm travel, 51mm offset, 29″, 15x110mm Boost, Thru axle, DebonAir air spring, Charger 2 damper cartridge, Low-speed compression adjustment to firm, Tapered steerer |
| Rear shock | Rock Shox Deluxe Select + RT Debonair 210x55mm |
| Shifter | Shimano Deore M6100 12 speed |
| Rear derailleur | Shimano Deore M6100 12 speed, long cage |
| Cassette | Shimano Deore M6100 12 speed, 10-51 |
| Chain | Shimano Deore M6100 |
| Chainset | Shimano Deore M6100 170mm, 32T chainring, 52mm chainline |
| Bottom Bracket | Shimano Deore M6100 BSA, 73mm |
| Brakes | Shimano SLX M675 2 piston, tooled reach adjust, steel-backed organic pad |
| Discs | Hope Technology floating disc FW: 203mm, RW: 180mm |
| Headset | Bird ZS44;28.6 | ZS56;40 Black |
| Stem | Nukeproof Horizon 50mm, 35mm clamp, Purple |
| Handlebar | Race Face Next 35 Carbon 760mm, 20mm rise, 8° backsweep, 35mm clamp |
| Grips | Ergon GA3 in Purple |
| Seatpost | Bird Down Dropper V2.1 150mm, 31.6 internal |
| Seat clamp | Nukeproof Horizon 34.8mm, Purple |
| Saddle | SDG Bel Air 3 Lux-alloy rails, 260mm x 140mm |
| Rims | Hunt Trail Wide 29″, 32H, 30mm internal, tubeless ready |
| Hubs | Hunt FW: 15x110mm Thru Axle, RW: 12x148mm Thru Axle |
| Tyres | Maxxis FW: Minion DHF Maxx-Terra 3C WT 29×2.5, RW: Ardent 29×2.4 |
| Sizes | M | ML | L | XL |
|---|---|---|---|---|
| Effective Toptube (mm) | 605 | 630 | 655 | 680 |
| Reach (mm) | 461 | 484 | 507 | 528 |
| Stack (mm) | 625 | 634 | 643 | 652 |
| Seattube (mm) | 395 | 420 | 445 | 470 |
| Chainstay (mm) | 430 | |||
| Head Angle static / sagged | 65 / 64.8° | |||
| Seat Angle | 77° | |||
| BB Drop static / sagged (mm) | 40 / 81 | |||
| BB Height static / sagged (mm) | 330 / 289 | |||
| Wheelbase (mm) | 1208 | 1235 | 1262 | 1289 |
| Headtube (mm) | 110 | 120 | 130 | 140 |
| Axle to Crown (mm) | 551 | |||
| Fork offset (mm) | 42 | |||
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