Muddymoles mountain biking in the Surrey Hills and Mole Valley

Bird Aeris 145 GX Eagle specification

Posted by Matt | January 23, 2019 | 1 comment so far

Bird Aeris 145 in lime green
The original spec of the Bird Aeris 145 that Mark is now running (that’s 145mm of rear travel if you can’t work it out!). It’s a great looking bike and should be a whole lot of fun.

Bird Aeris 145 GX Eagle

Colour Lime Green
Frame Bird Aeris 145 full suspension 6066-T6 aluminium frame
145mm rear travel, 12x148mm, Rock Shox Maxle stealth, clearance for 27.5×2.6 tyres
Fork RockShox Revelation RC
150mm travel, 27.5″, 15x110mm Boost, 150mm travel, Thru axle, DebonAir air spring, Motion Control RC damper cartridge, Low-speed compression adjustment to firm, Tapered steerer
Rear shock RockShox Deluxe RT3
DebonAir air spring, External rebound, 3 position compression (Open/Pedal/Lock), 230x65mm
Wheelset DT Swiss M1900 Spline 30 27.5″
FW 15x110mm Thru Axle,
RW 12x148mm Thru Axle
Shifter SRAM GX Eagle
1×12 speed
Rear derailleur SRAM GX Eagle
12 speed
Cassette SRAM GX Eagle 1275
12 speed 10-50
Chain SRAM GX Eagle
Chainset SRAM Descendant Eagle
170mm 32T, 7k AL DUB Boost crank, 52mm chainline
Bottom Bracket SRAM DUB
BSA, 73mm
Brakes SRAM Guide RE
4 piston, tool-free reach adjust, sintered pad
Discs SRAM
180mm front/160mm rear
Seatpost Race Face Aeffect Dropper
385mm / 125mm travel,
Saddle Fabric Scoop
Radius Sport, Cro-Mo rails, 282mm x 142mm
Headset Bird
ZS44;28.6 | ZS56;40
Stem Race Face Ride
35mm clamp, 50mm
Handlebar Race Face Aeffect
760mm, 20mm Rise, 8° backsweep, 5° upsweep, 35mm clamp
Grips Gusset
S2 in purple
Tyres Maxxis
FW Minion DHF 27.5×2.50WT 3C MaxxTerra EXO TR,
RW Aggressor 27.5×2.30 EXO TR Dual Compound

Bird Aeris 145 front view in lime

Bird Aeris 145 geometry chart (145mm rear travel with 150mm fork)

Bird Aeris One45 geometry chart

Sizes S M ML L XL
Effective Toptube Size S580 mm Size M605 mm Size ML630 mm Size L655 mm Size XL680 mm
Reach Size S433 mm Size M458 mm Size ML481 mm Size L506 mm Size XL528 mm
Stack Size S589 mm Size M589 mm Size ML599 mm Size L599 mm Size XL608 mm
Seattube Size S380 mm Size M410 mm Size ML440 mm Size L470 mm Size XL500 mm
Chainstay Size S435 mm Size M435 mm Size ML435 mm Size L435 mm Size XL435 mm
Head Angle static / sagged Size S65.5 / 65.4° Size M65.5 / 65.4° Size ML65.5 / 65.4° Size L65.5 / 65.4° Size XL65.5 / 65.4°
Seat Angle Size S76° Size M76° Size ML76° Size L76° Size XL76°
BB Drop static / sagged Size S10 / 52 mm Size M10 / 52 mm Size ML10 / 52 mm Size L10 / 52 mm Size XL10 / 52 mm
BB Height static / sagged Size S340 / 298 mm Size M340 / 298 mm Size ML340 / 298 mm Size L340 / 298 mm Size XL340 / 298 mm
Wheelbase Size S1178 mm Size M1203 mm Size ML1230 mm Size L1255 mm Size XL1282 mm
Headtube Size S110 mm Size M110 mm Size ML120 mm Size L120 mm Size XL130 mm
Axle to Crown Size S542 mm Size M542 mm Size ML542 mm Size L542 mm Size XL542 mm
Fork offset Size S42 mm Size M42 mm Size ML42 mm Size L42 mm Size XL42 mm

Visit Bird Bikes for more information!

Filed under Bikes in January 2019


About the author

Matt is one of the founding Molefathers of the Muddymoles, and is the designer and main administrator of the website.

Having ridden a 2007 Orange Five for many years then a 2016 YT Industries Jeffsy 29er, he now rocks a Bird Aether 9 and a Pace RC-627.

An early On-One Inbred still lurks in the back of the stable as a reminder of how things have moved on. You can even find him on road bikes - currently a 2019 Cannondale Topstone 105 SE, a much-used 2011 Specialized Secteur and very niche belt drive Trek District 1.

If you've ever wondered how we got into mountain biking and how the MuddyMoles started, well wonder no more.

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  1. Related: I might have bought a new bike... well a frame at least... | Mutterings | Muddymoles: Mountain biking (MTB) in the Surrey Hills and Mole Valley

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