Forum home Commuter cycling forum Commuting chat

Extreme seat height

TaliusTalius Posts: 282
edited June 2015 in Commuting chat
My new job means I go oop North every couple of weeks, and I've been putting the bike in the back of the car so I can have a ride in the evenings. My boot is pretty compact and I've been taking the seat post out and refitting by eye when I get there - I've got a clamp on the post to hold a bag and use that as the guide. The past couple of weeks I've been having a bit of lower back pain, and then this week quite severe sciatica-like pain in my left leg. Checked out the seat height today and it's been at 82cm - I've got an 86cm inseam and so that's 6cm higher than I normally run it!!!

I haven't been up North for about 3 weeks, so that means I've been running it that high for a good few rides, no bloody wonder my leg is all fecked. I guess my toes were pointed down more than usual to compensate, but even so, not entirely clear how I was able to pedal properly? And how on earth did I not even notice it? Think I must be losing it.

What's the highest anyone runs as a %age of inseam?
Merckx EMX 5
Ribble 7005 Audax / Campag Centaur

RIP - Scott Speedster S10

Posts

  • spasypaddyspasypaddy Posts: 5,731
    electrical tape around seat tube... never need to measure
  • itboffinitboffin Posts: 19,686
    i just took my seatpost out to clean and regrease beforehand i marked the height with a perm marker, just a thin red line
    Rule #5 // Harden The censored Up.
    Rule #9 // If you are out riding in bad weather, it means you are a badass. Period.
    Rule #12 // The correct number of bikes to own is n+1.
    Rule #42 // A bike race shall never be preceded with a swim and/or followed by a run.
  • telesv650telesv650 Posts: 59
    Electrical tape for carbon tubes or for aluminium I score the tube with a stanley knife. Leaves a small visable line and is permanent.
  • ddraverddraver Posts: 20,364
    When you say electrical tape - do you mean that the correct seat hight is where the tape "rests" on top of the seat tube? Or do you clamp around the tape?
    We're in danger of confusing passion with incompetence
    - @ddraver
  • rower63rower63 Posts: 1,991
    ...so that means I've been running it that high for a good few rides, no bloody wonder my leg is all fecked. I guess my toes were pointed down more than usual to compensate, but even so, not entirely clear how I was able to pedal properly? And how on earth did I not even notice it? Think I must be losing it.
    With excessive seat height you end having to rotate your pelvis "over the top" from side to side to get your hip-joint low enough for the bottom of the pedal-stroke. After a while it gets very tiring and painful in the lower back, but often you don't notice it to begin with. I see it quite a lot on the commute, swinging-hip syndrome while still seated.
    Dolan Titanium ADX 2016
    Ridley Noah FAST 2013
    Bottecchia/Campagnolo 1990
    Carrera Parva Hybrid 2016
    Hoy Sa Calobra 002 2014 [off duty]
    Storck Absolutist 2011 [off duty]
    http://www.slidingseat.net/cycling/cycling.html
  • schlepcyclingschlepcycling Posts: 1,572
    When you say electrical tape - do you mean that the correct seat hight is where the tape "rests" on top of the seat tube? Or do you clamp around the tape?
    Yes the bottom of the electrical tape rests on top of either the seat tube or seat clamp (depending how your seat post is secured).
    'Hello to Jason Isaacs'
Sign In or Register to comment.