Originally Posted by
grall1126
I was thinking of purchasing one of these chain deflectors. However, they come in a bunch of different sizes.
...I thought maybe the sizes are for the seat tube circumference?
Kinda, but not quite. It's seat tube diameter.
Originally Posted by
grall1126
... My Litespeed circ is 115mm, not sure which one to buy?
Well if you do the math 115 mm circumference is about 36.6 mm diameter. You may want to check your measurements, or get one that is quite flexible WRT size.