Strada has differnet sproket to trail.

I'm going to use JT sprocket numbers as they seem to be the easiest to get hold of.

All bikes have a JT F308 front sprocket with 15 teeth.

If you are doing off road then a 13 tooth will do a good job to slow you down. this knocks the speedo out by 12% increase.

At the rear Trails need a JT R5 with 44 teeth. You can go up or down with this if you want.

Chain is a 520 with 112 links.