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by 1timmy1
Published: 11th April 2022 (8 months ago)
Size? (Frame, clothing, wheel size etc. You can pick 3)
Collection only
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Sold pending collection

Bird Aeris 120 Frame with LT Linkage & Works Components -2 Degree Headset



Bird Aeris 120 27.5″ wheel frame (Medium-Large size) with both 130mm and 120mm rear travel linkages, can take a 140mm or 130mm fork. Works Components -2 degree headset. New MAX bearings in the frame and 130mm linkage (120mm linkage bearings are fine), new bottom headset bearing (top bearing is fine, plus a spare is included). ISCG05 chainguide mount, Rockshox rear Maxle, derailleur hanger, upgraded chainstay pivot hardware, original Bird velcro chainstay protector.

Approximate Geometry with the -2 Degree Headset, 130mm Fork & 120mm Linkage

Reach: 474.5mm
Stack: 594.5mm
Head Angle: 65 Degrees
Seat Angle: 75.46 Degrees
Wheelbase: 1215.2mm
Toptube (effective): 628.8mm
BB Height: 326.8mm
Chainstay: 430mm
Headtube Length: 120mm
Fork Axle To Crown: 522mm

Using a 140mm fork or the 130mm Linkage (or both) will slacken the bike out and the 140mm fork will raise the bottom bracket height.


I bought this frame from Bird and built it up in August 2017 with a 130mm fork and the original 120mm linkage. Bird later brought out the ‘LT’ 130mm linkage and certified the frame for use with a 140mm fork. These changes have made the frame evolve along with my riding and I’ve used it from XC/trail rides to uplift days. It has been a really versatile frame and I am a fan of the progressive geometry Bird uses in their frames. The Works Components -2 degree headset was installed by my LBS and makes the geometry of the frame is similar to the current Bird Ather 7. Making the head angle slacker just made the frame descend better and the headset also slightly steepened the seat angle which made climbing easier. Finally I upgraded the chainstay pivot hardware from Bird which makes taking the nut and bolt out much easier (also included is the original chainstay pivot hardware). The frame takes a 210mm x 55mm shock with 30x8mm hardware.


The frame has been ridden as designed for 4031 miles in total and therefore has cable/frame bag rub and paint chips in all the usual places. I have touched most of them up with some orange nail varnish (Bird doesn’t sell touch up paint for this particular orange), it’s not a perfect match but it’s better than seeing the missing paint. Please see the pictures and zoom in on them. I did install some AMS frame guard on day 1, and also added some more clear tape afterwards which I have left on for the next owner to decide if they want to take it off. If you’re after a cosmetically near new frame, this probably isn’t the frame for you. If you’re after a used but well looked after frame with new bearings that’s ready to roll, then this frame could well be for you.

Cash on collection only (from near Bakewell, Derbyshire). Thanks for looking, please check out my other items – including the Ohlins TTX Coil shock I used on this frame.

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