Sunday, July 21, 2013
New Hokas (again)
This makes pair No. 6. I had to retire a set of Hoka One One Stinson Evo trail shoes this week and these lasted about 2 months. Normally I'm around 3 months but with the increase in miles I'm not too surprised. Hoka's claim to fame is their massive sole cushioning and larger surface area. I think if you look closely at the worn shoes you will see the issue that Hoka has with this concept. I apologize for having the two center shoes so close - it appears the older shoe is tilted intentionally - which it is not. The shoe leans inward on it's own. On the left "old" shoe if you look at the sole - notice the creases formed at roughly ~ 45 degrees. The right shoe shows those similarly. Maximum stress in shear will be at 45 degrees and you can see the large foam cushion fails right where you would expect - and that leads to the inward leaning. A lot of the high mountain trails around here are deep "U" shaped troughs so my feet naturally turn inward when the singletrack is narrow - and deep.
I should have posted a photo of my Stinson road shoes where this has not happened, presumably of course because the road surfaces are flatter. However I do run those shoes off - road as well, so perhaps the foam cushion on the road shoe is more durable - meaning a denser, stronger material that resists shear? I concluded earlier that the road rubber is harder and wears less. I just cannot buy those shoes locally without mail order, so of late I have just gone down to BCE and bought these trail shoes.
This shoe works well for me, but the durability on these trail trail shoes is something I have questioned from day one. I still have time to run the road shoes up in the high country so maybe I do that with the existing, or buy a new set to experiment.