12-20-2010, 08:52 AM
Other threads here deal with stuck seatposts, this is the opposite case.
My weight (200 lbs. +) makes my legs get longer as i ride, so i came up with some maybe helpful suggestions...
Tightening the frame bolt squeezes the 2 ears on the frame together so that they're no longer parallel. That limits how far the bolt will tighten. I tried a thinner q.r. bolt using those ball washer thingies from v-brake pads contacting the frame surfaces. This helps prevent the q.r. bolt from bending under load while toeing in for better contact.
Also tried one or more alu. seatpost clamps directly on the seatpost. You match them to the seatpost diameter and file off the thin inside flange that normally keeps the clamp on top of the frame. This added resistance should keep the post from sinking. The bolts on these clamps also tend to bend under stress unless ball washers are put against the clamp surfaces.
Anyway, i hope the explanation makes sense.
My weight (200 lbs. +) makes my legs get longer as i ride, so i came up with some maybe helpful suggestions...
Tightening the frame bolt squeezes the 2 ears on the frame together so that they're no longer parallel. That limits how far the bolt will tighten. I tried a thinner q.r. bolt using those ball washer thingies from v-brake pads contacting the frame surfaces. This helps prevent the q.r. bolt from bending under load while toeing in for better contact.
Also tried one or more alu. seatpost clamps directly on the seatpost. You match them to the seatpost diameter and file off the thin inside flange that normally keeps the clamp on top of the frame. This added resistance should keep the post from sinking. The bolts on these clamps also tend to bend under stress unless ball washers are put against the clamp surfaces.
Anyway, i hope the explanation makes sense.