Could someone tell me the difference between a 1915-16 and a 1917-25 rear roadster fender.
1917-25: Crowned (higher in the middle than at the sides, like a road).
1915-16: Uncrowned.
The '15-'16 is flat no crown. The later fenders are crowned on top i.e. have a curve or radius in the top side of the fender body.
Thanks Steve
The mounting bracket is different.
Here are the different brackets:
1917-25
1915-16