These piston ring compressors are perfect for 650 c.c. motorcycles such as Triumphs and BSAs. The range on these is 70mm-75mm or 2.76" - 2.96". This makes it so much easier to slip your cylinder barrel down over your new pistons and rings, and makes sure you don't break a ring and drop it down into your crankcase, giving you that sinking stomach feeling.
Sold individually.