Quote Originally Posted by Shed tuner View Post
just did a little table showing the various piston surface areas relative to a std 25mm TX, and assuming std TX optimum piston weight of 220g

Pretty close to Dans data, except for the 30mm, as I guessed:

diameter area percent of TX weight std weight long spring
22....... 380...... 77%..... 170...... 153
25....... 491...... 100%.... 220...... 198
28....... 616...... 125%.... 276...... 248
30....... 707...... 144%.... 317...... 285
Data is a very strong word for the random numbers that fell out of my head. I would take your numbers over mine