Hot answers tagged

14

Can I put disk brakes on it? No. You cannot effectively convert a rim brake frame or forks to disc brakes. (Alternative answer: do I need to replace parts? Yes, the frame and forks.) Seriously though, if you are buying a new bike, buy the bike you actually want rather than planning to convert or upgrade. There are disc brake road bikes available across a ...


13

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 solvent, or (to get solvents off) use alcohol.


12

When I lightly apply the brakes only one part makes contact with the wheel There are two adjustment screws (Spring tension centering screw on the picture below) which are meant to center pads of V-brakes. Screwing one in makes a corresponding pad to move farther from the rim, screwing it out does the opposite. It makes sense to loosen one screw a ΒΌ turn and ...


10

They are universal except for a very few models called mini V brakes, which use short pull brake levers as opposed to long pull. These stand out as having very short arms compared to most. Shimano and Tektro make a lot of the good economical repair v-brakes. The model numbers change over time. Reworking splayed out noodle cradles is a pretty common repair. ...


8

You have a cyclocross bike. There is no reasonable way to add caliper brakes to that rear end, and probably the fork as well. Even if the frame was modified by bonding in a brake mount for a recessed nut, the reach of the brake that came with your group will be way too short, presuming it's a typical short reach road brake. Low profile, smooth post cantis ...


7

When I need to get it actually clean, and the whole area is really dirty with caked-on grime or dirt, what I use is a brush like this (pictured is from a Finish Line set): Using warm water, I get the rim/tire area wet, then put a generous amount of dish soap directly on the brush and get it wet too. Then I go around scrubbing at it. When complete, rinse ...


7

Giant's page on the Conduct semi-hydraulic brake system says that, emphasis mine: There's no need to replace your mechanical brake lever or handlebar tape - simply shorten your current cable housing, then mount the new master cylinder on your Giant Contact SL or Contact stem. It appears that the lowest-end Contact stem is $53 in the US. This is more ...


5

Single wall rims on disc brake wheels aren't especially any more problematic than with a rim brake. It's a pretty cynical way for bike manufacturers to allocate parts dollars, so thankfully it's not super common. Putting a single wall rim on a cargo bike is a bad idea though. Single wall rims are far less structurally efficient than double wall, typically ...


5

It depends on the contamination. If mud has dried on there, water and a clean brush or rag are sufficient - no oily rags though, and no soap. I have enough rags (old t-shirts and bedding) that after wiping braking surfaces I might use them on less important parts of the bike but then throw them away. This is also what I'd do to the rims if cleaning the ...


3

You wanted a barrel end brake cable for straight brake levers. What was sent to you is a curved or racing lever brake cable with a pear cable end (we called them mushroom). Cable end terminals (anchors): The steel cables have welded end pieces (see image) that are shaped to fit into slots in shifters or brake levers and because cables are not ...


3

While they are a few "adapters" that might sometimes allow installing the rear disc caliper onto certain frames (if lucky), these adapters look ugly and certainly won't fit the aesthetics of a road bike. Such an adapter would be more fitting for a hybrid, utility or ancient mountain bike. Similar adapters for forks do not exist because a rim brake ...


3

Giant sell the Conduct system as an aftermarket 'upgrade kit', and one of the requirements says, If you are fitting to a non-Giant / non-Liv branded bike you will need a compatible stem with the correct 31.8mm face plate & bolt pattern - such as the Giant Contact I would think that stems are available from other manufacturers which happen to suit this ...


3

Levers: Here calculating the mechanical advantage is easy. It is the distance from pivot to fingers divided by the distance from pivot to cable anchor. Examples for levers: Dia Compe V brake drop bar levers: 75mm / 29mm = 2.6x (approximately) Shimano BL-R400 drop bar levers: 72mm / 14mm = 5.1x (approximately) Some cheap Shimano V brake flat bar levers: 60mm ...


2

So it seems that Giant conduct system uses a device as the faceplate of the stem to convert mechanical cable motion to hydraulic fluid motion. This is a very poor design. There is no standard for stem faceplates. If you buy a replacement stem, you can be 99% certain its faceplate is different. The easiest way forward is to get rid of the mechanical levers ...


2

Don't do it. Yes, back when disk brakes were new and few bikes were available with them it sorta made sense to "upgrade" the bike to disks (though you had to be a real bike nerd to do this). But, as the others have said, the compromises you'd have to make to get disks to work on a non-disk bike are expensive, dangerous, and just flaky. If you ...


2

You cannot mount side-pull calipers as seen on rim brake road bikes. Cantilever brakes are compatible with road brake levers but as Nathan points out they are difficult to set up right. What you need are mini v-brakes. Those fit the mounting points and are compatible with road brake levers. Note that regular length v-brakes are not compatible with the levers....


1

Your V brakes are called normal length V brakes based on the measurement you showed. They have mechanical advantage of bit over three. There are also short "road" V brakes having mechanical advantage of bit less than three. If you install such "road" V brakes, you will note that braking force is slightly adversely affected so you need to ...


1

I tend to just wipe around the rim with a clean or cleanish rag, or perhaps a paper towel. Depends what's in my hand at the time. There are three types of dirt I've noticed: the dry crusty powdery silt that sticks to the rim. Black or grey. black fines that stick to the brake pad, and the brake arms. larger detritus that embeds into the brake pad The ...


1

Replaced brake pads with new ones. Try a different brake pad material. Don't just blindly replace brake pads with new equivalents of what you currently have. Try a different material. I used to prefer Kool Stop Salmon colored pads on all bikes I owned. However, on one of my bikes, Kool Stop Salmon pad squealed in the front cantilever brake like hell. I even ...


1

Would 105 BR-5500 brakes be much of an improvement over what I have? What could the improvement be? Lighter weight would mean the brake arms are less stiff, causing flex in the brake system. Thus, you cannot reasonably reduce the weight of the brake arms. Besides, most weight reduction "upgrades" are not worth it, giving only few tens of grams of ...


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