Seat position fore/aft

rob39

Can anyone advise on the fore and aft seat position. Where on the knee do you measure from and how accurate is this. I'm looking for a relaxed riding position, I have done a measurement from the base of my knee cap through the centre of the pedal axle which showed I needed my seat further back (a good inch). So did this and now I can see the hub of my front wheel (seat has quiet a bit of lay back), a shorter stem would probably fix. (currently 100mm stem fitted)
Seat height is set by the 109% method

skyd0g

There's a good guide here: http://bikedynamics.co.uk/fit02.htm
...but remember, it's a guide, not a rule. ie. there will be some variance from this dependant on how it feels to you. Likewise, the being able to see your hub fore/aft of the bars is also a guide, and will of course depend on what position you're in on the bars. Hope this helps.

dennisn

Is there any other subject, other than LA and maybe weight training, that's as big a can of worms as this one?

jouxplan

Have a read through this - lots of very good common sense, and warnings about the problems caused by such things as Knee Over Pedal Spindle. [url]infohttp://www.stevehoggbikefitting.com/blog/2011/05/seat-set-back-for-road-bikes/[/url]

You say you use the 109% method for seat height. Use of such formulae can be very misleading. Have a read of this http://www.stevehoggbikefitting.com/blog/2011/02/seat-height-how-hard-can-it-be/

I have had numerous bike fits and seen first hand how some of the 'formulaic' approaches can be a disaster. The advice that Steve Hogg gives is very, very useful in this regard