Seatpost Bung

Brompton SKU: Q100045
Brompton Press-Fit Seatpost Bung (409196265509)

Seatpost Bung

Brompton SKU: Q100045
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Within 30 days of your purchase, if you find a lower advertised price for this product, we’ll match it. If we discount this product within 30 days of your purchase, either online or in-store, simply present your original receipt and we’ll match the price and refund you the difference.

To be eligible for a price match, the product must meet the following criteria:

  • Product must have the exact specifications
  • Price must be listed in CAD or USD
  • Final matched price must include all shipping, handling, and duties
  • Must be sold and shipped by an authorized dealer in Canada or the U.S. (excluding Amazon, eBay, or any other online-only retailers)
  • Must be new and not refurbished or liquidated stock
  • Must be in stock and available immediately
  • Price must not be lower due to an error, sale, or discount

To request a price match, visit our store or contact us. Please provide a written quote or a web address for the product showing the lower price.

Genuine Brompton Replacement Seatpost Bungs. The bung is the rubber plug that goes in the bottom of the seatpost and stops your seatpost bashing the floor when you fold. It also prevents the bike rolling when folded which is especially useful on R-type bikes with a rear pannier rack.   

Available in Press-Fit or Screw-Fit. The Press-Fit has been supplied as standard on all new Brompton bikes since 2018. This model is considerably lighter than the other model but as it simply pushes in, it can go missing. The Screw-Fit is more robust and heavier but is fixed in place so more secure.

  • Genuine Brompton Component
  • Replacement Rubber Seatpost bung
  • Prevents damage to the bottom of your seatpost
  • Acts as a brake when folded
  • Tool free 
Curbside Cycle Free Shipping

FREE SHIPPING ON ALL PARTS & ACCESSORIES ORDERS OVER $150*

Canada: We use UPS, Purolator, Canpar or Canada Post within Canada. All applicable Provincial Taxes are charged at checkout. Orders may take 1-2 business days to process. A tracking number will be provided by email.

USA: We use UPS, UPS Mail Innovations, or Canada Post/USPS in the USA. No US or Canadian Tax is charged at checkout and all cross-border Fees and Duties are prepaid so there are no surprises. Orders may take 1-2 business days to process. A tracking number will be provided by email.

*Does not apply to oversize items.

Brompton Bicycles - Curbside Cycle

A BIT ABOUT BROMPTON: If you were to walk into the store and look at a Brompton we would say there are three things you should look for in a folding bike. All of them are fairly obvious. One, the bike should ride well - and, on a small wheeled bike that's tricky because there's a fine line between maneuverability (which is a virtue) and twitchiness (which is a vice). Two, the bike should fold well - otherwise you're blood pressure will rise and you'll curse the day you bought it. Third, it should be transportable, or highly storable - because that's the whole point, right?

Brompton is the only company we've seen that answers all three criteria - and believe us, we've tried every brand out there. The reason others can't compete is because Brompton has answered a fundamental engineering problem. If a bike is going to unfold to a large footprint (which takes the twitch out) then it is unfolding to a bigger bike - and by all logic, a bigger bike unfolded would be a bigger bike folded. So, it's pretty much true that for most folding bikes they either have great rideabilty but poor transportability or vice versa. And nearly all of them are a mess to fold.

Not Brompton. Brompton has designed the Platonic form of all folding bikes. The bike folds to the smallest size on the market, unfolds in a highly precise and easy manner, and has the same axle-to-axle footprint as a hybrid bike. How did they do this? By not only designing a clever frame, but also designing some 1200 proprietary parts that make everything fit - and fit perfectly. Oh, and nearly all of this is made in England. No wonder this bike has a cult following.

THINKING OF BUYING AN BROMPTON? READ OUR BLOG POST WHY BROMPTON?

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