Endurance testKona Big Kahuna

Mirja Martin

 · 04.12.2013

Endurance test: Kona Big KahunaPhoto: Andreas Beger
Endurance test: Kona Big Kahuna
Small bikers on 29ers: never? Bike guide Mirja Martin and her Kona endurance tester disagree.


Endurance test performance: 3,232 km | 45,420 altitude metres

As a Transalp guide, I dreamed of a 29er for a long time, as wheel sizes were wildly discussed on every tour. Don't get me wrong: My 26er All-Mountain had never let me down before, but now I wanted to know whether a 29er made sense for me.

I felt comfortable with the 16-inch frame of the Big Kahuna right from the start: the geometry is suitable for touring, the 710 millimetre wide handlebars and the wide Maxxis tyres convey a sense of security. The low-maintenance Scandium frame, the two thru-axles and the solid mid-range equipment ensure stress-free kilometres. The Big Kahuna accompanied me across the Alps several times without a hitch and the Sram X7 gears worked flawlessly. Only on steep climbs on the main Alpine ridge did I wish I had a 22 or 24 t chainring. On day tours, however, the 26 teeth at the front were sufficient. I particularly enjoyed the 29er's smooth ride on long gravel descents and fast corners. The big wheels swallowed roots and stones with ease, but were surprisingly manoeuvrable on the trail.

Only the Avid rear brakes required regular maintenance. The Kona was finally put to the test in Australia: 600 km of Great Ocean Road and 300 km of dust-dry trails - up and down. The Kona showed no weaknesses in the outback. Very easy to maintain, it took me over hill and dale in the Australian trail parks and put a big smile on my dusty face. Not as lively as a 26er, but all the smoother: the robust Big Kahuna also impressed me down under.


Functionality ****
Shelf life *****
(max. 6 stars)


Conclusion: reasonably priced touring 29er which, apart from the technical quibbles with the fork and brakes, cuts a fine figure even for small bikers and women. Unfortunately a little heavy. Top: the X7 groupset.


Tuning


- 130 km - change to SQlab: Instead of the WTB saddle and the standard grips, I fitted the SQlab saddle and grips. The seat post was fitted with a quick release for fast lowering.
- 250 km - Tyre change: Changed to Schwalbe Rocket Ron tyres before the first Alpine cross

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Defects
- 2300 km - Fork ticks: Stroke can no longer be used: Air in negative chamber lowered
- 2950 km - Pistons stuck: The pistons of the Avid rear brake are stuck and occasionally block the rear wheel: Pistons cleaned

  Piston seizure: The pistons on the rear stoppers were so tight that the rear wheel was partially blocked.Photo: Andreas Beger Piston seizure: The pistons on the rear stoppers were so tight that the rear wheel was partially blocked.  After 2300 kilometres, the suspension travel could no longer be fully utilised. Only less pressure in the negative chamber compensated for this.Photo: Andreas Beger After 2300 kilometres, the suspension travel could no longer be fully utilised. Only less pressure in the negative chamber compensated for this.  Rider: Mirja Martin, bike guide; has been riding bikes since 1999; weight/height 57 kg/1.70 m; rider type Tour/All Mountain; favourite area Piedmont/La PalmaPhoto: Andreas Beger Rider: Mirja Martin, bike guide; has been riding bikes since 1999; weight/height 57 kg/1.70 m; rider type Tour/All Mountain; favourite area Piedmont/La Palma

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