30 votes

Big dent on frame: How did this damage happen?

It seems that this dent belongs in the bike. Here is a photo of a similar bike. While image is of low quality, the dent is visible: However, as pointed out by Lamar Latrell in comments, in your ...
  • 1,395
27 votes
Accepted

Why aren't 16" wheel city bikes more common?

I have ridden bikes with different sizes of wheels, from 29" MTB/622 Road wheels, through 20" folder, 12" scooters, and one folding A-bike with 6" wheels. My perception is that ...
  • 103k
21 votes

Big dent on frame: How did this damage happen?

If it is damage then no one here can say for sure how it happened. However, it's in the realm of impossible-ish for a dent that severe to happen without paint damage or a clear mark in the paint ...
21 votes

Front V-brake not working

The 'noodle' (the curved silver tube the brake cable passes through) has slipped through the holder on the right-hand (in your picture) brake caliper. The noodle is designed to come out of the holder ...
18 votes
Accepted

Are all folding pedals a bit... bendy?

Yes, I've used a variety of folding pedals on my Dahon and Brompton and they're all a bit flexy. I've had plastic ones snap in half on me (and yes, that can be very painful/dangerous). The best ones I'...
  • 28.6k
16 votes

Big dent on frame: How did this damage happen?

I think you'll find that the handlebar 'stem' folds to the left, and will line up with the dent when folded. If the dent is not supposed to be there, my best guess is that the handlebar was folded ...
15 votes

Bicycle weight limit (carrying capacity) increase

On a non-folding bike, I'd look at the wheels, and probably replace them with 36 spoke touring wheels and reasonably wide, tough tyres (e.g. 35mm). The tyres absorb some of the shock loads. However a ...
  • 48k
13 votes
Accepted

Why do folding bikes usually have MTB components?

Great question! I think the market drives this -- not necessarily just the folding bike market, but the component market. Mountain bikes have been the predominant type of bicycle for the past ...
  • 28.6k
11 votes
Accepted

Are folding handlebars a good idea from an engineering standpoint?

Well, from an engineering standpoint, no. It increases complexity, cost and weight. Those might be a deal breaker for the commuters who would likely use them. From a practical standpoint, maybe. @...
  • 1,371
11 votes

Why aren't 16" wheel city bikes more common?

I cycle round a city (Chester) every day, typically covering five to ten miles in a trip. Even though this is on allegedly high quality roads the reality is that there are a lot of potholes and other ...
10 votes
Accepted

How do people store bicycles in London?

To add to Michael's comment if it's your property you can't be forbid to bring a bicycle into your apartment, unless it's somehow unlawful to be in possession of said bicycle. Would you be forbid to ...
  • 5,346
9 votes
Accepted

Tern Spartan (front rack) on Bike Friday NWT

Yes, a Tern Spartan Front Rack does fit on a BikeFriday New World Tourist (and also the Tern Cargo rear rack): To prevent the rack from interfering with the V-brakes I mounted the upper end of the ...
  • 1,286
9 votes
Accepted

Bicycle weight limit (carrying capacity) increase

tl;dr: if you want a sturdy folding ebike, you need to have a sturdy folding bike. Even if the bicycle statically/dinamically can stand more than the declared weight (at your own risk), the (expected)...
  • 3,280
9 votes

Why are folding fat-tire bikes all-electric?

My assumption would be that the people who buy this kind of bikes are interested in casual cycling or commuting and not in technical riding. As you wrote, folding bikes are heavier, very large tires ...
  • 10.1k
8 votes
Accepted

What are these cable "unions" called

Not sure if there is a tradition term for these. At the time of writing I found Some products simply called cable splitters or separators and Ritchey quick disconnectors
8 votes

Fiido D2: shock absorber broken

Your best bet would be to contact the manufacturer for specifications or even replacement parts. Failing that, your next best thing should be to measure/learn parameters of your current shock, and ...
8 votes

Front V-brake not working

A further thing to watch out for when following Argenti's (correct) advice: Check the end of the noodle holder very carefully. I've seen some old, cheap V brakes in which this was too soft and ...
  • 48k
7 votes
Accepted

Any way to transport kids on a folding bike?

If you go with one of the bigger, more solid folding bikes you can use a standard child seat. With most smaller-folding bikes you'll run into weight limits even if you can get one to fit - they're ...
  • 23.1k
7 votes

Why do folding bikes usually have MTB components?

Road-bike specific components are designed for weight not strength. MTBs are expected to survive rougher handling. Although folding bikes don't want to be heavy, they need to be tough, often getting ...
  • 48k
7 votes

Consultation needed! To repair or throw out?

Based on the photos you might not need any parts at all. The chain looks pretty awful, and is likely siezed up, but a good clean is required to see if it needs replacing. I've had some ugly chains ...
  • 103k
6 votes

How do people store bicycles in London?

In my experience, it seems fairly standard practice for the tenancy agreements supplied by agents to forbid the storage of bikes in properties. I have always just done so regardless, though I can ...
6 votes

Are folding bikes less efficient than full sized bikes?

The factors that affect bike efficiency are: Weight Mechanical power train Losses Aerodynamic Drag Rolling resistance For a touring bike, the difference between a folding and regular bike are all ...
6 votes

Are folding handlebars a good idea from an engineering standpoint?

Running through a quick list of "engineering considerations" that I've just made up: costThese will cost more to design, test, manufacture and assemble at point of sale than conventional handlebars. ...
  • 23.1k
6 votes

Cheapest way to make 8 speed folding bike a good climber

I've done something similar with a 6 speed bike (42 tooth chainring, and 14-28 rear. Its now a 48/38/28 with an 8 speed 11-32 cassette, so the lowest climbing gear is 15.4 gear-inches. A folding ...
  • 103k
6 votes
Accepted

Wheel diameter affects speed? Comparing 20in Foldie wheel vs 700C wheel

There are at least four factors involved: 1. Tire pressure The thinner the tire, the higher pressure it requires, and the higher pressures it can handle. More pressure means less deformation, and less ...
6 votes

Alwasy getting a flat rear tire on my 14"inch folding bike

There are a few possibilities: The culprit is still stuck in the tire. Carefully check for any glass shards, pieces of wire, thorns etc. Something is sticking out of the rim. Check if the rim tape is ...
  • 21.2k
6 votes

Why aren't 16" wheel city bikes more common?

I can easily bring it up the stairs even without folding it or really quickly lift it from the frame to get across complicated obstacles on the road (say up a curb or past construction work areas). ...
  • 14k
6 votes

Seat post keeps sliding down after cleaning and lubricating folding bike

This page from an Australian Brompton retailer suggests 3 options (you've probably tried the 2 first ones): cleaning the seatpost and the tube with isopropyl alcohol. tighten the clamp (by one ...
  • 10.1k
5 votes

Studded tires for small wheels

At the time the question was asked, there were no 16" studded bike tyres. Now, however, there are: http://www.schwalbe.com/en/pressereader/spikes-for-birdy-and-brompton.html But unfortunately there ...
  • 2,516
5 votes

Advice on Folding Bicycle

A good folding bike should ride just as well and last just long as a traditional bike. BikeFriday has a reputation for bikes that feel "normal." As far as maintenance goes there is very little ...

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