I can answer the first question. I'll be asking the second set sometime in October for myself as I'm looking for a winter set of shoes soon.
The difference is more than just width. The 235 tires are also a little taller. First number is the width. The 70-part of the wheel info tells you how tall the sidewall is relative to the width. 0.70 x 235 = 164.5mm or around 6.48 inches. 0.70 x 225 = 157.5mm or 6.2 inches.
This translates into a taller ride and also some speed reading changes.
Total height
6.5 x 2 = 13 + 16" wheel = 29" wheel and tire
6.2 x 2 = 12.4 + 16" wheel = 28.4" wheel and tire
Speed is based on circumference
29*pi = 91.11inch/rotation
28.4*pi = 89.22inch/rotation
Resulting in a 2% difference in your speedometer... so in your instance, a little faster... I think.
Hope this helps!
P.S. I think someone on here uses the Mich ice tires.
The difference is more than just width. The 235 tires are also a little taller. First number is the width. The 70-part of the wheel info tells you how tall the sidewall is relative to the width. 0.70 x 235 = 164.5mm or around 6.48 inches. 0.70 x 225 = 157.5mm or 6.2 inches.
This translates into a taller ride and also some speed reading changes.
Total height
6.5 x 2 = 13 + 16" wheel = 29" wheel and tire
6.2 x 2 = 12.4 + 16" wheel = 28.4" wheel and tire
Speed is based on circumference
29*pi = 91.11inch/rotation
28.4*pi = 89.22inch/rotation
Resulting in a 2% difference in your speedometer... so in your instance, a little faster... I think.
Hope this helps!
P.S. I think someone on here uses the Mich ice tires.
