33 votes

Brakes not stopping my bike

Based on the specs on the Amazon page, its a low-end bike with cost-conscious components. A quick google returns reviews like https://www.bikeride.com/takara-sugiyama/ that say things like "...
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  • 99.3k
25 votes

Is this rim still safe to use?

Sorry, those rims are trash (or wall art). I'd chase down the seller and demand your money back, and report them on whatever sites they were advertising on for selling items in a known dangerous state....
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21 votes

Is disk brake effectiveness mitigated by tyres losing traction under strong braking?

Ideally, the brakes should be able strong enough to break traction otherwise you will not be able to brake maximally (i.e., just before the threshold of losing traction). Rim brakes can do this, even ...
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  • 29.8k
19 votes
Accepted

What's the purpose of the channel in the brake track of this rim?

It's a wear indicator. The friction of the brakes gradually abrades the rim away and the track lets you see how fast that's happening. Once the rim has worn enough that the track is very shallow, the ...
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18 votes
Accepted

V-brake vs hydraulic disk-brake - which is more environmentally friendly

We can assume that V-brake pads are essentially non-degradable. The same is true for resin disc pads. But are non-recyclable. Metal disc pads seem to be various copper alloys which are probably OK ...
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  • 46.3k
17 votes

Stopping power of mountain vs road bike

You have already answered your own question really. When I slam the brakes on the wheels lock up(front and back) but i take longer to stop than i'm perhaps used to. If the brakes are strong enough ...
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  • 14.6k
17 votes

two grooves in wheel rim

These are wear indicators. After years of braking, the surface of the rim will grind down to a point that these grooves will no longer be discernable. At that point, you should replace the rim.
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  • 1,802
16 votes
Accepted

Strange cable mount

They're called Travel Agents and are used to change the cable pull of a brake lever so you can mix and match brake styles.
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  • 5,736
14 votes
Accepted

How do bicycle brake manufacturers balance their products' physical limitations?

There is more to it than the 3 factors you describe beyond just the conversion of one force to another. A few others: The deflection of the linkages in braking. A flimsy brake caliper will ...
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  • 11.7k
13 votes
Accepted

Can I convert a rim brake wheel to a disc brake wheel?

The hub for a disc brake wheel has the mounting for the brake rotor machined into the left side, and has shorter spokes that side to make room for the brake. If the eBay wheels are for rim brakes, ...
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  • 12k
13 votes

How to clean rim brake track efficiently?

Fold a paper towel a couple of times and stick it between pad and rim. Squeeze the brake lever and rotate the tire. Depending on the contaminant you may want to wet the towel, douse it lightly with a ...
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12 votes

Is there a wheel which can use both disc brakes and rim brakes?

Rim brakes need an appropriate braking surface on the rim -- if you apply rim brakes to a rim which doesn't have an appropriate braking surface, it'll wear down the rims quickly to be unsafe to ride ...
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  • 45.5k
12 votes

V-brake vs hydraulic disk-brake - which is more environmentally friendly

The world is full of perfectly good cantis, v-brakes, and rim brake wheels that sit unused since disc has taken over. Using what we've already produced for its actual full service life is pretty hard ...
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11 votes
Accepted

Is it possible to control two brakes from a single lever?

Glad to see you're back! You can use a Problem Solvers Cable Doubler 1:2 to pull 2 brakes with 1 lever. Its a little device which you hook up the two brakes to (assuming they have the same cable pull)...
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  • 45.5k
11 votes
Accepted

Uneven wear of brake pads

With the brake tension released (either through the quick release or untensioning the brake wire) is the spring tension on both sides equal? As @Daniel R Hicks notes, some unevenness is inevitable ...
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  • 28.5k
11 votes

Stopping power of mountain vs road bike

The maximum braking force is achieved when the tire is just about to loose traction and start sliding on the road surface. Braking force decreases sharply as the tire begins to slide. If you are ...
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11 votes

What is the purpose of an insert pin for Magura brake hoses?

I assume by 'pin' you mean the following part: This part is called the 'insert' or 'connecting insert' and its purpose is to 'support' the (non rigid) brake hose in order to prevent it from crushing/...
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11 votes
Accepted

Did my 2015 rim have wear indicators on the brake surface?

As @abdnChap correctly stated, not all rims have wear indicators, which are usually one or more dimples on the rim or a groove machined around the whole rim. Without a wear indicator, gauging the ...
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  • 19.5k
11 votes

V-brake vs hydraulic disk-brake - which is more environmentally friendly

The true answer is: It really doesn't matter. You are riding a bicycle, that is what matters. If you are truly eager to minimize your ecological footprint, caring about the break type on your bike is ...
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10 votes

Is thru axle with rim brake okay?

It is of course in general OK to but rim brakes on your bike IF the frame supports them and IF the rim has the braking surface. You will need the right brake levers and cables. If your disc brakes ...
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9 votes
Accepted

Why would my rear brake pads wear faster than front?

There are a couple of factors that might come into play. The first is that you may be braking more than you think at the back. Which brake is controlled by your stronger hand? Are they adjusted the ...
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  • 46.3k
9 votes
Accepted

How to prevent loose brake cables with a single pivot side-pull mechanism?

It's because you have a combination of brake levers designed for V-brakes and side pull brakes. V-brakes need more cable pull for the same effect, so your levers pull the cable too fast. The ...
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  • 19.4k
9 votes
Accepted

V-brake arm not returning to "open" position

There are a few possibilities but its fairly easy to isolate the likely problem. Unclip the noodle (where the cable comes out) and check if the problem is in the V brakes or the cable. If its the V ...
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  • 40.1k
9 votes
Accepted

Why does my front brake cable push out of my brake lever?

The lever is not broken. The lever's job is to pull the cable away from the brake. There are springs in the brake that should pull the cable away from the brake lever. The cable housing should allow ...
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  • 16.3k
8 votes
Accepted

Best downhill braking method to avoid overheated rims?

The power output from braking is linearly dependent on speed and braking force. To reduce heat buildup, you have to reduce either one of these. The options are: Descend very slowly. This is boring, ...
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  • 19.4k
8 votes

V-brake arm not returning to "open" position

Daniel's comment is right, in addition check the brake lever for stiffness. You should be able to undo the noodle from the noodle-holder, the brake arms should extend out to the sides, and each ...
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  • 99.3k
8 votes

Why replace brake cartridge when grooves wear off

This is a good question. The short answer is that the design of modern rim brake pads is greedy and cynical. This is a Mathauser pad, and is representative of how a lot of old brake pads were, and ...
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8 votes

Can I convert rim brake to disc brake on road bike?

To do this "properly" you need to replace all these parts: a new frame with disk caliper mounts a new fork with disk caliper mounts all the brake system parts, being calipers and rotors, hose etc. ...
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  • 99.3k
8 votes

Changing my All City Mr. Pink to disc brakes

It’s not practical to do this. The frame needs to be built to take disc brakes, and this frame isn’t. In theory, you could find a custom framebuilder who could add the mounting points and ...
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  • 24.1k
8 votes

Why are Disc Brakes better in the Rain?

Discs have a much higher clamping force. For rim brakes, there's usually quite a bit of movement; you can run the brakes with 5mm clearance from the rim and it'll still work fine. With discs, the pads ...
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  • 10.9k

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