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Is there such thing as too much aft?(6 posts)

Is there such thing as too much aft?Mr Nick
Sep 1, 2003 3:56 PM
When I had my bike originally fit the fore and aft was set for KOP. After much reading and much pressure on my hands I decided to move my seat back some. I have started with .5cm and it doesn't seem to be enough. I want to go to 1cm or more and I was wondering if there are any problems with this besides possibly loosing power. I also am aware that seat height has to be adjusted for fore and aft positioning. Thanks for the help.
re: Is there such thing as too much aft?Juanmoretime
Sep 1, 2003 4:50 PM
To a certain extent, setting your seat back is usually a position of more power, provided you have a long enough femur. Look at LeMond geometry, usually 72 degree seat tube which has you more over the rear wheel. What type of shifters are you using and how much drop from the saddle are your bars? How much reach on your handle bars? Shallow or deep hooks? Changing the height of your bars or going to shallower bars can achieve reducing your reach without changing your saddle position.
Yes, but you're not there yetKerry Irons
Sep 1, 2003 4:58 PM
The general guidline is KOPS +1/-2 cm. So -0.5 is not pushing the limit. People move the seat forward for better spin and better leg/torso angle. The latter allows you to get lower on the bike for aerodynamics. People move the seat back for more leverage when climbing, and the position favors lower cadence. The more rear position is generally favored by those with longer femurs. However, fit is highly personal so there's nothing wrong with experimenting to find out what works/is comfortable for you. Also recognize that very slight movement in your body while setting up for a KOPS measurement can throw the numbers off, so you're not starting with a position that is all that precise in the first place.
fore - aft and hands.Frith
Sep 1, 2003 5:54 PM
I imagine it does to some extent effect the pressure on your hands but I would not want to be playing with my fore/aft position solely to relieve my hands. I say start with KOPS (or the nearest estimation) and then play around with it to get a nice spin and a balance between power at low cadence and smoothness at high cadence. If this position happens to be a little further back that's cool but it may turn out the best position for you is further up. As for going too far back I don't think you need to worry as long as your legs feel good in motion.
Have you tried tilting your seat so that the nose is slightly higher. This shifts alot of weight off your hands. also
back excercises
concentration on a relaxed grip
and good gloves/bar tape can also help.
possibly...C-40
Sep 2, 2003 5:20 AM
But you won't know unless you try it. KOP measurements are very difficult to take accurately. I've moved my saddle back about 1cm from the position that I've been riding for years with no ill effects.

The thing that many people forget to consider is the reach to the handlebars. If you move the saddle back 1cm you should install a 1cm shorter stem to maintain the same reach. Otherwise, you may feel uncomfortable and not give the saddle position an extended tryout.

When you move the saddle back 1cm, lower it about .3cm to maintain the same maximum leg extension. You should notice an increase in the abilityto apply torque to the cranks with the saddle further back. This is good for climbing, if it doesn't reduce your cadence on the flats. If you notice a significant reduction in the ability to spin, the saddle is too far back or the saddle may also be too high.
Not according to recumbent riders.dzrider
Sep 2, 2003 5:47 AM
That's really the limit in terms of moving a seat back and lowering it. You find a spot for your seat where you're comfy and satisfied with your speed and leave it there til you're no longer comfy and satisfied with your speed. Will it ease pressure on your hands? That remains to be seen? If it does, you'll have an answer for one of our FAQ's.