Weight
Some riders have reduced the Birdy's weight to 8 kg using racing components, but this was only on the older round tube frames. (These older frames had some reports of cracks and breakage. The new frames, stem, and seatpost are about 1 kg heavier than the original 1996 models.) However, stock bikes range from 10.2 kg (for the new Birdy Speed with Tune and Shimano Ultegra road components) to over 12 kg, depending on the setup. The heavier bikes tend to have 3x8 gearing systems, involving an internally geared rear hub and an external derailleur.
Read more about this topic: Birdy (bicycle)
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