You must use a 17mm axle when you use the genuine Z1 front wheel (check part no. R-039 or R-158)
If you use 17/18 inches wheel you need tachometer-drive (check part no. R-017/R-040)
You must use special calipers and caliper brackets
The tubes can be ordered in silver or black color.When you order let me know which color you want.
