{"id":40246,"date":"2022-08-03T13:00:27","date_gmt":"2022-08-03T11:00:27","guid":{"rendered":"https:\/\/www.bikeradar.com\/?p=691744"},"modified":"2022-08-03T13:14:11","modified_gmt":"2022-08-03T11:14:11","slug":"bird-revamps-the-aeris-9-offering-up-to-180mm-of-enduro-ready-travel","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/cyclingplus\/rss_feed\/bird-revamps-the-aeris-9-offering-up-to-180mm-of-enduro-ready-travel\/","title":{"rendered":"Bird revamps the Aeris 9, offering up to 180mm of enduro-ready travel"},"content":{"rendered":"

<\/p>

By Tom Marvin\n \t\t<\/p>

Published: Wednesday, 03 August 2022 at 12:00 am<\/p>

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UK-based brand Bird has updated its Aeris 9 enduro bike<\/a> with a new frame allowing up to 180mm of travel<\/a> at each end.<\/p>\n

The frame will come as standard with 160mm of bump-eating travel and a bias towards descending performance. However, Bird will be offering an aftermarket linkage, which will bump up travel to a super-enduro style 180mm.<\/p>\n

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The Aeris\u2019 side profile follows a common theme with its other models.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

This is all backed up with a new tubeset that allows the use of 180mm forks, whether you\u2019re running 160 or 180mm of travel out back.<\/p>\n

To ensure the Aeris 9 is up to the task, it\u2019s been hidden in plain sight under Bird riders Liam Clement (EWS U21 racer) and Tomas Kupstys, as they\u2019ve claimed numerous domestic podiums.<\/p>\n

Bird Aeris 9 frame details<\/h2>\n
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Jet Black is one of the colour options offered by Bird.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

While Bird offers a carbon version of its Aether trail bike<\/a>, it stuck with aluminium for the construction of the Aeris 9.<\/p>\n

Bird says that while the bike is designed for enduro use, it has finely tuned the anti-squat<\/a> to keep it pedalling well, while also giving each size unique seat tube angles to ensure rider weight distribution is kept in the right place, regardless of how tall (or short) the rider is.<\/p>\n

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Chainstays are sculpted for ankle clearance.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

On top of a linkage that changes the travel, there is a flip chip in the rear triangle to adjust geometry<\/a>. This adds 6mm to the chainstay, slackens angles by 0.5 degrees and reduces the bottom bracket height by 7mm.<\/p>\n

Those running 160mm forks will get an even more slacked-out shape with the chip flipped, while those with 170 to 180mm forks will see the BB height returned to figures similar to a \u2018standard\u2019 160mm-fork Aeris, but with an even longer and slacker<\/a> bike.<\/p>\n

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The Aeris 9 has been built with coil shocks in mind.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

The frames offer the ability to run cables internally, for a cleaner look, or externally, for those who want an easier maintenance schedule. Cables aren\u2019t run through the headset, because Bird says \u201cwe don\u2019t hate you\u201d.<\/p>\n

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Cables can be run internally or externally.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

The four-bar suspension system has oversized main pivots, running double-lipped bearing covers to reduce dirt and water ingress and prolong their life.<\/p>\n

Other frame features include a SRAM UDH<\/a>, a threaded BB<\/a>, space for 29\u00d72.6in mountain bike tyres<\/a>\u00a0and room for a \u2018good-sized\u2019 bottle in the smallest frame, even while using a piggy-back coil shock.<\/p>\n

Raw aluminium, \u2018Jet Black\u2019 and \u2018Blurple\u2019 (a flip-flop blue\/purple paint) will be offered.<\/p>\n

Bird Aeris 9 geometry<\/h2>\n
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The flip-flop Burply paint appears to change colour in the sun.<\/span><\/figcaption> Bird Cycleworks<\/i><\/span><\/div>\n

Bird has long been a purveyor of long and slack bikes, and this remains the case with its latest enduro sled.<\/p>\n

Bird will offer the bike in four sizes, from medium to extra-large (with a medium-long being the size you might not have guessed). This covers riders from roughly 168 to 193cm tall.<\/p>\n

<\/colgroup>
\ufeff160mm fork \/ 440mm chainstay<\/th>Medium<\/th>Medium-long<\/th>Large<\/th>Extra-large<\/th><\/tr><\/thead>
Effective top tube<\/b> (mm)<\/td>600<\/td>625<\/td>650<\/td>675<\/td> <\/tr>
Reach <\/b>(mm)<\/td>457<\/td>426<\/td>515<\/td>544<\/td> <\/tr>
Stack <\/b>(mm)<\/td>618<\/td>627<\/td>636<\/td>645<\/td> <\/tr>
Seat tube <\/b>(mm)<\/td>395<\/td>420<\/td>445<\/td>470<\/td> <\/tr>
Head tube <\/b>(mm)<\/td>100<\/td>110<\/td>120<\/td>130<\/td> <\/tr>
Wheelbase <\/b>(mm)<\/td>1,230<\/td>1,263<\/td>1,296<\/td>1,330<\/td> <\/tr>
Chainstay length<\/b> (mm)<\/td>440<\/td>440<\/td>440<\/td>440<\/td> <\/tr>
Standover<\/b> (mm)<\/td>670<\/td>674<\/td>679<\/td>682<\/td> <\/tr>
Effective seat tube angle<\/b> (degrees)<\/td>77<\/td>77.5<\/td>78<\/td>72.5<\/td> <\/tr>
Real seat tube angle <\/b>(degrees)<\/td>72<\/td>73<\/td>74<\/td>75<\/td> <\/tr><\/tbody><\/table>