PSI on the sidewall can reflect the tread pattern uses and not the strength of the tire
This info for the Cheng Shin 693 & 241 tires only
Here's an Example: beach cruiser tire vrs street tire
26" x 2.125" Cheng Shin 693 classic knobbie, psi on the sidewall says 30 - 35 psi
26" x 2.125" Cheng Shin 241 street tire, psi on sidewall says 45 - 65 psi
693 tread pattern is for sand gravel and pavement
241 tread pattern is for pavement only
693 and 241 are close cousins it's just the tread pattern that's different
The construction strength of the 693 and the 241 are exactly the same
The only reason the 693 recommends 30 - 35 psi on the sidewall is because the tire will perform better in sand and gravel @ 30 - 35 psi
45-65 psi can also be put in the 693 if your gonna ride on pavement only
I studied these tire because I was curious about their PSI differences
I use the 693 on my Whizzer M/B and inflate my tires to 45 psi
Pic of the 693
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241
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