Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.


Seatpost slips downwards
#1
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.
  Reply
#2
Is the seat post the right size? There are like 37 different seat post sizes.
  Reply
#3
Absolutely. It came stock with the new bike, and when the clamp screw is released i have to pull and twist to get it out. (zigzag grease marks on the post.) I greased the post against better judgment as recommended by Sheldon Brown but find it hard to believe he cd. be wrong about anything.

Anyway the rig seems to be holding up. The above comments were offered as a poss. solution for other sufferers of folding bikes. The seatpost does look like a wind instrument though.....
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
3,636
04-27-2020, 03:24 PM
Last Post: Joe_W
 
17,652
06-02-2014, 04:41 PM
Last Post: BingoBilly
 
24,387
10-31-2012, 11:43 AM
Last Post: lupystar
 
51,666
10-21-2012, 07:19 AM
Last Post: FredS
 
13,171
10-21-2012, 04:23 AM
Last Post: 1FJEF
 
12,248
07-25-2012, 10:58 PM
Last Post: Bill
 
10,440
02-03-2011, 03:19 PM
Last Post: DaveM

Forum Jump:

[-]
10 Latest Posts
Giant reporting profits are 60% down
Today 12:21 AM
Thoughts on tariff effects on the cyclin...
Yesterday 11:06 AM
braking by reversing the pedals
Yesterday 10:15 AM
Post-Ride Nutrition
04-03-2025 02:06 AM
🚴‍♂️ Saddle Up for the Belgian Waffle Ri...
04-03-2025 02:03 AM
Pre Ride Food Intake
04-03-2025 12:14 AM
SAVA Explorer 6061?
04-02-2025 03:31 PM
Zwift v Spin v Wahoo
04-01-2025 05:59 PM
Have you Ever Tried an Electric Bike?
04-01-2025 05:07 PM
Good Morning from SW Ohio
04-01-2025 07:32 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. GirishH
22 posts
no avatar 2. Flowrider
18 posts
no avatar 3. Jake1
12 posts
no avatar 4. meamoantonio
12 posts
no avatar 5. SPINMAN
8 posts