Do 155mm cranks require changing saddle setback, and if so, what are the implications for bike fit and overall performance. When considering the switch to longer crank arms, its often assumed that the increased length will lead to a more efficient pedal stroke and improved power output. However, the impact of this change on saddle setback is rarely discussed, and yet its a crucial aspect of maintaining proper bike fit and avoiding potential issues such as knee pain and reduced efficiency.
If we take the conventional wisdom that saddle setback is determined by the riders position on the bike, with the knee cap aligned over the pedal spindle at the 3 oclock position, does the increased crank length necessitate a change in saddle setback to maintain this alignment. Or are the benefits of longer crank arms negated by the need to reposition the saddle, potentially disrupting the delicate balance of the riders position on the bike.
What are the specific implications for riders with longer or shorter legs, and how do these changes affect the overall fit and performance of the bike. Are there any notable differences in the way that different types of riders respond to changes in crank length and saddle setback, and if so, what are the key factors that influence these responses.
Furthermore, what role do other factors such as seat height, handlebar height, and foot position play in determining the optimal saddle setback for riders using 155mm cranks, and how do these factors interact with crank length to affect the riders position and performance on the bike.
Ultimately, what are the key considerations for riders looking to switch to 155mm cranks, and how can they ensure that their bike fit is optimized to take full advantage of the benefits offered by these longer crank arms.