34 votes

Why do bike share bike typically have drum brakes?

Mostly it is about maintenance costs and reliability. Drum brakes require the least maintenance of all brake types and have lower initial cost than disk brakes. They are also not affected by damage to ...
ojs's user avatar
  • 21.8k
7 votes

Can drum brakes make a bike harder to pedal with?

A drum brake should have no more drag than a rim or disk brake presuming it is properly adjusted. There is more mass in a drum than a caliper, so the bike is overall-heavier but this isn't going to ...
Criggie's user avatar
  • 121k
6 votes

Tandem drum (drag) brake levers and ergonomics - typical setup/options

The typical setup for a drum brake is that it is operated by a bar-end shift lever (friction lever, not indexed) controlled by the stoker to act as a check on an over-exuberant captain. The barcon ...
Adam Rice's user avatar
  • 29.2k
5 votes
Accepted

Drum brakes - ineffective when cold

Moisture may have collected on the friction surfaces and frozen. Warm the bike up and re-test.
Emyr's user avatar
  • 3,906
5 votes
Accepted

What kinda of maintenance does a Sturmey Archer X-FDD DynoBrake hub need?

There is very little to do with this hub. Mostly you need to tighten brake cable. Edit. After 2 years of everyday use with 7-30 kilometers per day in city traffic with lot of junctions, using ...
krzyski's user avatar
  • 2,693
4 votes

Front drum (was disc) brake only works when going backwards (!)

There are two possibilities: 1.) The roller brake mechanism and internals are completely seized. Based on the level of rust on the outside of the brake, there is a strong possibility that there is ...
JonR's user avatar
  • 581
4 votes

Tried to tighten the brakes, won't grip at all

On the first picture, if you look closely at the cable right to the bolt at the center, you will see deformation marks from the previous clamping. The position where you have clamped the cable seems ...
Grigory Rechistov's user avatar
4 votes
Accepted

Tandem drum (drag) brake levers and ergonomics - typical setup/options

I set up a 1980s tandem with flat bars, front V-brake and rear Magura hydraulic HS33 rim brake. The rear hydraulic brake gives alot of power for relatively little force. Our gear shifters are classic ...
Noise's user avatar
  • 13.6k
3 votes

Tandem drum (drag) brake levers and ergonomics - typical setup/options

Disclaimer: I've never ridden a tandem so the following answer is all theoretical based on reading. I did a bit of research into this area around the time I asked this question. As you can see, in ...
Andy P's user avatar
  • 18.3k
3 votes
Accepted

Need help to identify a brand of a japanese cruiser women bike

Except for the hub generator it looks a lot like this Bobby Town bicycle. Searching for "bobby town bicycle" will pop up a couple other bikes. Bikes like this are widely sold in Japan. From ...
David D's user avatar
  • 20.7k
3 votes

Need help to identify a brand of a japanese cruiser women bike

Mamachari, a slang term literally meaning “mom’s bike,” are Japan’s ubiquitous city bicycles. Featuring baskets and, often, child seats Mamachari A functional and sturdy bicycle used mainly to run ...
Superman.Lopez's user avatar
2 votes

Can drum brakes make a bike harder to pedal with?

I'm not entirely convinced brake drag would massively slow you down. I have dragging disc brakes on my electric road bike, but never have bothered to straighten the disc rotor with the proper tool ...
juhist's user avatar
  • 18k
2 votes

Need help to identify a brand of a japanese cruiser women bike

It is a practical bike, but in my view the bolt holding in place the seat tube and the seat stays seems very dangerous (i.e. do not carry a child on that back seat). Final note: Japan exported extreme ...
EarlGrey's user avatar
  • 3,500
2 votes

Tandem drum (drag) brake levers and ergonomics - typical setup/options

One option that has not yet been mentioned is to install an electric assist motor with regenerative braking option. This would mean a hub motor that either has regenerative braking capability built-in,...
jpa's user avatar
  • 1,727
2 votes
Accepted

Drum brake that fits on a Brompton fork?

70mm is the diameter of the brake drum. There is model XL-FD which is labeled as "90mm Front Drum Brake Hub" that has equal width but larger drum. The respective pitch circle diameters are 89.9mm and ...
ojs's user avatar
  • 21.8k
2 votes

What is the difference between BR-IM and BR-C Shimano drum brakes?

The BR-IM roller brakes are older models that are discontinued. The current models are the BR-C (e.g. BR-C6000). From the Hub roller brake Dealer's Manual (dated 05/31/2021), we can see that the BR-IM ...
olliebulle's user avatar
  • 4,111
1 vote

Can drum brakes make a bike harder to pedal with?

I have the same experience with drum brakes, there is a fine balance between enough braking power and no-drag coasting. I did notice a huge difference after cleaning the inside of the brakes I ...
Pelle's user avatar
  • 133
1 vote

Can I put a 9mm axle hub with a Shimano roller brake into a 3/8" fork?

Any free space between axle diameter and clearance width of dropout sides can exacerbate problems with maintaining the correct tension between the dropouts when the wheel is installed. The last thing ...
jc allen's user avatar
  • 669
1 vote

Shimano roller brakes: differences between each model and interchangeability

For all I know the roller brake mounting mechanism is the same for all the Shimano roller brake models and all use the same cable pull ratio. Different (ly priced) models have different stopping ...
bikegremlin's user avatar
1 vote
Accepted

Axle adjustment in Atom drum brake?

Answer Yes its a standard cup and cone axle. I had to unbolt the reaction arm from the chainstay, and unbolt the brake cable from the activation lever arm. This was simple. Gotchas though - you ...
Criggie's user avatar
  • 121k

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