47

IS mounts (also frequently called IS tabs, disc tabs, etc) are unthreaded eyelets 51mm apart that bolts run through parallel with the hub axle. In almost all cases the brake caliper is then bolted to an adapter that has one set of threads for the IS mounts and another 74mm apart for the caliper. (There are a few caliper models that omit the adapter. Shimano, ...


25

Centerlock largely exists because since the beginning of modern disc brakes for bikes, Shimano has more or less alone had a weird cautionary take on the physics of rotor bolts theoretically being able to loosen in the six-bolt design. That's why their six-bolt rotors have always come with various retention systems for the bolts that nobody else bothers with. ...


22

Well, there are lot's and lot's of commuter bikes with internal hubs and disk brakes. I see no reason why a single speed wouldn't work as well. A google search for "single speed cx bike disk brakes" turns up this beauty. http://allcitycycles.com/bikes/nature_boy_disc There are low budget models out there as well. Nashbar 29'r Single Speed Swobo makes ...


21

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 in wet weather, if set up correctly. The real advantage of disc brakes in wet weather is other aspects of how the brakes perform. From personal experience, ...


19

You got the wrong pads. While it's possible to mix and match some pads, this is usually not the case. When replacing pads, keep track of: Pad material and what your rotor is compatible of. Some rotors have a "resin pads only" etched on. Consult user manual or manufacturer website for this info. Pad shape. Note the features, like "handles" shape, amount and ...


16

For the brakes to self clean and remain effective, the surface of the pad must transition from metal to void at least once every revolution across the entire pad (i.e. no continuous line of metal). The 'sawtooth' rim achieves this. Some very cheap disks do not achieve this. You may find the very good answer by @trailmax in this question useful.


16

If you are asking one of each type on the bike, yes. As disc brakes were becoming popular, many companies produces bikes with a disc in the front and a rim brake in the rear. If you are asking about one of each type on a single wheel (three or four brakes total for the bike) yes that would also be possible, but there wouldn't really be a point. Also ...


16

Yes. Disc brake rotors can warp a little in use, or get bent from impacts and straightening them is routine maintenance. The basic procedure is to find spots where the rotor is bent inboard or outboard, and carefully incrementally bend it back. There are tools made for this purpose (e.g. Park tool DT-2) but the job can be done with a large adjustable wrench....


16

You will need a wheel with a hub that is rotor compatible and fits your bike. There are two main ways to mount a disk brake rotor to the hub. A Shimano centerlock design has splines on the hub to allow a rotor to be attached. Or a six bolt rotor mount Your front hub does not have either of these mounting methods. If the fork is original to the bike then it ...


15

In order to fit a disc brake, you need a compatible fork and a compatible wheel, plus a compatible brake lever. Your fork does have a disc brake mounting already designed in, it is an International Standard (I.S.) mount. Most mtb brakes now are Post Mount fittings so are fitted using a simple adapter. You can see the differences here or search around images....


15

Disc brake pads are very sensitive to contamination. You can clean the disc rotors with rubbing alcohol, but that's about it. Anything else will contaminate the pads. You may not be able to restore the pads. The easiest and surest thing would be to replace the pads. If you want to try to restore the pads, get some "drywall sanding screen", remove ...


15

Render R's are very susceptible to the arm being over-actuated. They don't hit a physical stop like some of their peers, but they reach a point where the cable anchor location is hanging in space and can't be pulled anymore. That you can't get good power even braking from the drops suggests this is the problem. Detach the cable. Set the barrel adjuster all ...


15

Re: When I tried to spin the front wheel, it just popped out of the frame. I was NOT applying any force and it just came straight off This suggests the quick release was not properly attached or tightened at that point in time. If it was indeed loose when you were riding, the wheel could have moved in the dropouts and the disc rotor then jammed in the ...


14

Disc brakes are generally more effective in the rain than rim brakes, but using rim brakes properly in the rain has served people well for many years. You need to feather the brakes to remove the water+crud from the rims. Softer brake pad compounds can also help you brake more easily. Also, having good quality brakes that are well adjusted is always a good ...


14

These things are called tightening plates or lock washers. Your suggestion was righ in where it goes, here's an exploded diagram and installed photo:


14

Advantages of 6-bolt: Not being patented by Shimano means more vendors offer compatible wheels/disks. Torx bolts require a smaller tool which is often included in many multi-tools so one can always have one on the road. Advantages of Centerlock: Faster installation and removal with a cassette tool; no need to fiddle with 6 separate bolts No need to have ...


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

Cable discs rule if you are riding a lot of third world. I am a million miles away from a shop, access to the oil, etc. A hydraulic failure would be disaster, whereas the worst thing that will happen with a cable disc is a lose bolt/need for readjustment. As smooth as hydraulics are, the fix of a failure when in the middle of nowhere (whether third world or ...


13

Low-profile button-cap socket screws do have a design weakness. The button reduces the amount of material around the head and the recessed hex or Torx socket also does the same, exactly at the interface of the screw body and head. In this zoomed in portion of your larger photo, you can see just how little material connects the head to the rest of the screw: ...


12

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 on (or possibly damage the rims in other ways). Disc brakes need a hub that can mount a disc rotor. As you can note from the two points above, they're ...


12

A couple more pros of centre lock: Finned rotors One big difference is that you can't get the finned Shimano Ice-Tech rotors used on the road bike groupsets in a 6-bolt configuration. E.g: or I've had brake fade on my Shimano RS685/785 set up on descents in Wales and wanted to try the finned rotors, but my hubs are 6-bolt. You can make a centre lock ...


12

On most cable disc brake systems there's a moving pad and a fixed pad. The moving pad presses against the rotor and bends it slightly towards the fixed pad. The rotor is made of rather springy steel, and is probably where the feeling you experience comes from. The barrel adjuster only addresses wear to the moving pad, but the fixed pad also wears in use. ...


12

No, not normal at all. You should have a bike shop look at it for a safety check if you are new to the sport and bike. One thing that can cause a wheel to bend is poor spoke tension. A good bike shop should be able to fix that for you pretty quickly.


12

The rotor needs thorough degreasing, finishing with alcohol to ensure there is no residue. The trick is that when there's actual oil on it, you should use something nasty like brake cleaner, but then finish with alcohol. If it's really nasty another good way of getting the bulk of the contamination off is soak it in boiling water with some dish soap, then ...


11

There is a trick: The pads need some "persuasion" to get past the spring clip. Here is a side view of the pads and the spring clip showing how the pads nest within the steel clip. This should make obvious why a little force is required to get the pads to move fully into the caliper. After much frustration, I finally looked at the pad and the clip in that ...


11

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, they won’t have these disc mount features out the box. If the spoke counts match and are sufficient, you could theoretically rebuild the rims onto disc specific ...


11

The main reason is the 2020 Specialized Shiv provided by their sponsor is only produced in a disc version. You can see an article about the bike here: https://www.bikeradar.com/news/specialized-sworks-shiv-tt-disc/


11

In all honesty, you can use any disc you like, and from practically any manufacturer as long as the dia. (and fitment type) is the same.


11

The magic of lobes allows Torx to handle a given torque value with a shorter bolt head than the alternatives, and some frame/fork designs need the clearance in this area. That's the only reason for it. Some secondary bolt retention designs won't work with just any bolts, ie Shimano.


10

There's no problem mounting a disc-compatible hub to rim-brake compatible rim. Just make sure they've got the same number of spokes and you're good to go. You're absolutely right about the opposite though, disc brake rims generally do not have a braking surface on them, the rim profile is round there, so it wouldn't work. And if you did try to brake on it, ...


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