I found this table showing the relative hardness of different durometer ratings. 60D is much harder than 50A. A friend that bought 60D rubber reported that it is almost as hard as a car tire.
I’m planning on trying 3/16″ 60D rubber (a little thinner but much harder) for my next pair of sandals if I can’t find polyurethane rubber by then.
I did a 2.5 mile run in my huaraches today. I used a new lacing pattern that had 3 back straps. This was also my first run off of pavement, although only about 50 yards was off of the pavement. It’s definitely strange running with such thin and flexible soles on rough terrain. It seems like I need to make sure I snug the laces a little more. I had the strap coming loose and had to stop and retie my right sandal.
I’ll post this lacing pattern soon.
I went for a 1.5 mile run to test out my lacing pattern. It still felt like the back straps were digging into my heel. I didn’t feel any chaffing.
I also found that I can simply slide the heel straps down and slide my foot out of the sandal. This is convenient, because the lacing I just described isn’t the simplest.
First, I finally cut off the extra cord from the toe, burnt the end, and used rubber cement to glue the cord to the sandal. I made sure the hole was located so it would have minimal contact with my toes when they move around.
From this point, I started with the standard lacing through the rubber. Note that I have moved the inside ankle hole about 1/2″ toward my heel from my initial try.
Then I ran the cord over my foot and under the back strap.
Then I ran the cord back over the top of my foot (and above the previous strap) and under the back strap on the inside of my foot.
Then I ran the cord back over the top of my foot. This time it was below the two previous straps, to form a single thick strap.
Next I ran the cord under the toe strap and though the hole between the toe strap, heel strap, and rubber.
Then I ran the cord around the back (under the previous back strap) and though the hole between the cord and rubber on the inside.
From here, I snugged everything up and tied the cord off to the toe strap.
Note how the second back strap helps snug up all the cord.
Amazon has neoprene for cheaper. As of this post it’s $10.
It’s a different hardness rating that what I bought 60D (Amazon) vs 50A (Drillspot), although I don’t know what these numbers mean.
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