Brompton S1E Single-Speed Folding Bike Review
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Brompton S1E Single-Speed Folding Bike Review

Brompton S1E Single-Speed Folding Bike Review

There’s been a strong belief among folding bike enthusiasts that Brompton is a luxury brand with high-quality products that could last for years and won’t suffer from depreciation. I had the chance to test ride the Brompton S1E Single-Speed Folding Bike in the last few months and I must say it is really different to other bikes we have reviewed here. Let’s check it out.


Unboxing Video

Features & Specs

  • Weight: 22.4 lbs
  • Folded size: 22.2″ x 21.5″ x 9.8″
  • Shipping Weight: 27.7 lbs
  • Box Dimensions: 23″ x 24.5″ x 11.5″
  • Handle bar: S Type
  • Gears: 1 speed
  • Frame: Steel
  • Suspension: standard
  • Tires: Brompton Kevlar
  • Wheel size: 16″
  • Lighting: reflectors only
  • Made in UK


Unlike most other folding bikes, all Brompton foldings bikes are using 16-inch instead of 20-inch wheels. There are always compromises when it comes to wheel size, but I expect the Brompton S1E could has its own solutions to deal with the issues, especially when it has such a hefty price tag. An obvious advantage of the smaller wheels is that it can reduce not only the size but also the weight of the bike. As I place the S1E alongside the Dahon Speed Uno, you can see the S1E is significantly smaller and nearly 2 lbs lighter. This can make a huge difference if you really need a compact bike to bring everywhere. The Brompton can function as a shopping cart or be wheeled with luggage on it, so it will make your life much more convenient. You can bring it to public transportation, to supermarkets, or check it on your plane without paying extra charges for oversize or overweight baggage.

The S1E is one of Brompton’s featured bikes. If you go to Brompton website, you can even build your own bike with a great deal of options. You will be able to customize handlebar, gear, gear ratio, mudguard, rack, frame material, frame color, saddle height, saddle, suspension, tyre and lighting.

The folding and unfolding process of the Brompton is a little more complicated than other 20-inch wheel bikes but if you compare it to some Dahon bikes with 16-inch wheels, the process is pretty simple and effortless. You just need to follow the exact instructions like demonstrated in the video below. Just remember to fully raise the seatpost when unfolding and fully lower it down when folding the bike. The seatpost acts as a lock of the Brompton bike, therefore, it should be the first to adjust when unfolding and the last to adjust when folding.

Folding and unfolding the bike is slower than my previous bikes because it takes some time to turn the bolt to tighten the hinge clamp plates. Besides, the clamp and lever look quite big, so the bike doesn’t look as sleek as I expected. I find that the V-Clamp on Dahon bikes makes the folding process faster and also makes it look cleaner.

The frame of the bike is made of steel, so it seems quite stiff and strong. Brompton said the bike can deliver an efficient transmission of our energy, unfortunately, it still can’t compete with high-performing bikes with bigger wheels (I’m mentioning 20-inch and bigger wheels). I have no problem reaching high speeds with this bike but I have to use quite greater force, especially when I start pedaling. That’s the reason why I get tired very soon after just about 25 minutes. Besides, you should only ride the bike on paved roads because any pothole could cause you trouble.

Everything else about this bike is great. It is perfectly fit for me and I really enjoy smooth rides with no unstable steering occurring on many small wheelers.


Test Ride



  • Compact and lightweight design.
  • Great customer support and spare parts.
  • Provides a very smooth ride.
  • Durable components.


  • The outdated clamp design makes folding/unfolding slower.
  • Performance and comfort are sacrificed.

The Brompton S1E is the most affordable folding bike by Brompton. This is a great choice if you are looking for a really portable folder that doesn’t sacrifice performance significantly.

Price: $1,255

Review Overview

Build Quality
Riding Experience


One of the most portable folding bikes.


  1. Lynn Folger

    Hi, I’ve been looking at the Fiat 500 Pop folding bike as i am 4’11” and need a,lightweight bike with a low step over. The seller suggested a rider height of no less than 5’2″. What do you think? Any suggestions of other folding bikes to consider? Thanks

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