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Old 06-24-19, 09:35 PM
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Join Date: Mar 2016
Location: Caracas, Venezuela
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Bikes: Imremo (cheap taiwanese mtb) and vintage Jupiter King (Japanese '70s road bike)

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Are 26-in wheels not good for trikes?

The guys at AZUB say 26" wheels are not as good as 20" ones for trikes because they are less rigid. I thought it was a far-fetched claim until I saw this video of the Atomic Zombie Delta Wolf.

Right at the 0:20 mark, the driver does a violent maneuver to avoid a puddle and it can be seen how the 26" wheels flex. I guess that's why the Hase Kettwiesel has its 20" rear wheels canted outwards: to minimize that flexing.

Now, those are 36-spoke wheels with a fair amount of dish. The hubs were custom made out of solid steel, so they are not feeble lightweight stuff!

AZUB claims they have solved the flex problem by using a thru-axle in their 26" equipped trikes, and Bryan Ball agrees. ( see his review of the AZUB Ti-Fly here: )

My question is, how much of an issue wheel flex on a trike really is? And, what are the ways to increase wheel stiffness to these kind of forces which are not present on leaning bikes?
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