I believe that works for some people but as we all know, everybody is different. I tried the lower pressure as well with the wider tires and no thanks, NOT FOR ME!
Every crack in the road felt like a pinch flat and the descents were really scary. I could feel the tires sinking and giving with lower pressure. I had to slow way down in order to feel safe. On these mtn road switchbacks, I feel safe with hard tires that feel like riding on rails vs the soft giving feel.
Same with low spoke count wheels. Being a bigger rider, I feel the rims flex in the tight switchbacks at speeds of 30+. I prefer a hard tire and a stiff rim like Deep V's (30 MM deep).
Feeling safe is my priority and with soft tires and rims, no thank you!
I've ridden an MTB down these switchbacks as well and no thanks! Those big soft tires are meant for the dirt. I just don't feel safe on soft tires and wheels.
Switchbacks for 8 straight miles at 30+? No thanks, I'll keep my tires pumped!
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