Originally Posted by sydney
Then what makes you think either a 107 or 110 would be right?
The cheap BB I pulled with the triple crank is a 118. I replaced it with an Ultegra 109.5 and a Coda crank - a 175. But my kid is only 4'6" and I want shorter cranks. The Bulletproof crank, a double, is a 155 but uses a square taper BB. The UN53 comes in 4 sizes - 107, 110, 115 and 118.
I'm assuming the 2 smaller ones are for 2x's and the larger ones are for 3x's.
55/Rad