Lifan Xpect 300 Mile Megaride

[ProDigit]

For street use, your best gearing is between a 17/37 and a 17/38t.
I don't use mine for off-road.
I have a 17/36 on mine, but the bike has difficulty maintaining speeds with a strong headwind.
And anything 17/36t or higher (like up to 17/32 gearing) will give trouble starting from a stop, with engine stalling.

If you ride hilly terrains, a 17/38 might be ideal.