Does tyre size (diameter) influence friction drive speed/gearing

best size roller is 1 1/4in for a 26in tire..thats what i use for my 30cc and it works great gives you torque and top end speed!!
 
best size roller is 1 1/4in for a 26in tire..thats what i use for my 30cc and it works great gives you torque and top end speed!!

Yes, a 1.25 inch roller is a good all-around size, but the 'best' roller size depends on motor HP, rider weight, top speed required, and terrain...

A heavy rider, in hilly terrain might be better off using a 1 inch or even 7/8 inch roller, whereas a featherweight rider on flat terrain could go with a 1.5 inch roller.
 
best size roller is 1 1/4in for a 26in tire..thats what i use for my 30cc and it works great gives you torque and top end speed!!

Yes, a 1.25 inch roller is a good all-around size, but the 'best' roller size depends on motor HP, rider weight, top speed required, and terrain...

A heavy rider, in hilly terrain might be better off using a 1 inch or even 7/8 inch roller, whereas a featherweight rider on flat terrain could easily go with a 1.5 inch roller.
 
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