I purchased my Brompton recently.
I'm 158, but I carry my 20-pound dog in her doggy backpack. The seatpost tends to slip down over time, which seems to be a common Brompton issue.
An old-school fix for a non-folding bicycle is to use a hose clamp, but that's ugly and would work against the folding of the Brompton.
So… I purchased an extra telescopic seatpost clamp. This provides additional support and avoids over-clamping the primary seatpost clamp.
by Total_Coffee358
5 Comments
No, no, no, no…..
Assuming you’re talking about lbs. You are FAR BELOW the weight limit. I weigh 198 lbs (needed to translate from 90 kg) and I have ZERO issues.
You need to take it back because this is NOT normal. The reason it is slipping is because either the plastic sleeve is defective or the frame clamp needs tightening.
DO NOT tighten the frame clamp yourself if you don’t know what you are doing as you can really kill the frame. Take it back and let them fix it.
if u bought it brand new, u should have brought it to nearest Brompton dealer / Junction in the first place. what you are doing isn’t fixing the problem, but merely band-aid-ed it. the problem is still there.
Some owners have to get a new sleeve fitted as often as every 6 months, I find mine needs renewing every 18months/ 2 years . If theres one thing that makes me get rid of my Brompton its the seat post issue
“They all slip?” No. Not all of them.
My H6L is 5½ years old, used every day, and has never slipped… that is, after an initial small increase in tightening on day one.
Judging by the exposed threads on your seat post clamp nut you might be over tightening your seatpost clamp. Also I’m substantially heavier than you and my seatpost doesn’t slip there are a number of causes of slippage some of which are surprisingly small but can have a huge impact on how firmly the seatpost is held.