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Airnimal Chameleon Ultra review

Folding road bike

Our rating 
4.0 out of 5 star rating 4.0
GBP £1,849.00 RRP | USD $3,052.51

Our review

A performance road bike that happens to fit in a suitcase
Skip to view product specifications

It’s a truism with folders that, the smaller the wheel, the less likely the bike is to ride like a bike with full-size wheels, but the better the fold is likely to be. Airnimal’s philosophy is to create ‘a folding bike that performs with the best conventional bikes’.

There are different Chameleon models for different types of riding, even loaded touring. Our test bike did have eyes for mounting a rear rack, but this model is really one for travelling light and fast.
  • Frame: The tough, oversized aluminium frame accounts for nearly a third of the bike’s weight, but that folding mechanism needs to be strong (8/10)
  • Handling: No real compromises – handles very much like a standard geometry road bike with full-size wheels (8/10)
  • Equipment: Shimano’s Ultegra forms the heart of a decent specification (7/10)
  • Wheels: The 24in wheels are light, but this size rolls better than 20in wheels and much better than the 16in wheels seen on many folders (8/10)

Although the Airnimal doesn’t have a Brompton-style fit-in-a-matchbox fold, you can quickly reduce its dimensions and keep jobsworth train guards quiet. Just 30 seconds will get the Chameleon small enough to go in a car boot; three minutes will get it small enough for a 30x24x12in suitcase.

But while it will fit in a suitcase, out on the road it performs very much like a conventional road bike. Weight is just a shade over 20lb – nearly a third of which is accounted for by the oversize aluminium frame that hinges in the middle.

By contrast the 24in wheel and tyre combo is very light. But unlike folders with 16 or 20in wheels, these larger wheels cope easily with holes in the road without letting them swallow you and the bike whole or throwing you off line.

And on climbs those small, lightweight wheels come into their own, while the efficient frame and unified rear triangle mean that your pedalling efforts aren’t wasted.

There is some damping, in the shape of an elastomer, taking away the worst of the road stings, but this doesn’t result in any unwanted flex. Different elastomers are available, depending on how much damping you want.


One final thing: the Chameleon name, what’s that all about? The bike doesn’t change colour, it changes shape. Huh?

Airnimal Chameleon Ultra
airnimal chameleon ultra: airnimal chameleon ultra

Product Specifications


Name Chameleon Ultra (09)
Brand Airnimal

Available Sizes M/L S/M
Rear Wheel Weight 1298
Top Tube (cm) 56
Standover Height (cm) 59
Seat Tube (cm) 47.5
Chainstays (cm) 41.3
Bottom Bracket Height (cm) 29
Weight (lb) 20.6
Weight (kg) 9.36
Stem Pro LT forged alloy, twin bolt 1 1/8in steerer clamp, 4 bolt oversized bar clamp
Shifters Shimano Ultegra 10 spd STI
Seatpost Pro LT alloy, 27.2mm dia, 350 mm with twin bolt forged alloy seat clamp
Saddle BBB padded vinyl, chromoly rails
Rims Velocity Uriel
Rear Hub alloy low flange
Bottom Bracket FSA external type, sealed alloy cartridge, English threaded 68mm shell
Rear Derailleur 105 short cag
Handlebar Pro LT alloy, anatomic deep drop, 42 cm c-c
Front Wheel Weight 889
Front Hub alloy low flange
Front Derailleur Shimano 105 braze-on
Frame Weight 2770
Frame Material Tig-welded o/s alu, single pivot rear triangle suspension; replaceable gear hanger;
Fork Weight 463
Fork carbon blades, alloy 1 1/8in steerer, alloy crown and dropouts
Cranks FSA Gossamer forged alloy two-piece splined, 170mm arms, 130mm bcd, alloy rings, 53/39t
Cassette Shimano CS-6600 12-25 10spd
Brakes Shimano 105 forged alloy dual pivot
Wheelbase (cm) 102