Hot answers tagged

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. ...


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 ...


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 ...


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

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 ...


11

As long as you existing rotors are in good condition and thicker than 1.6mm (minimum safe thickness) you should have no issue with using them with the Shimanos. There doesn't seem to be an industry standard specification for rotor thickness but it is generally taken to be between 1.8mm - 2.0mm. The new callipers will self adjust to the rotor width. Clean ...


10

One disadvantage of 6 bolt is that you can torque one side just a bit more than the other which can cause the rotor to be just a bit warped. Center-lock torques evenly by design so there’s no risk.


9

Every brake manufacturer recommends only using their own rotors, so this is another case where the answer depends very much on who you ask. In general, here is where rotor cross-compatibility can go wrong: Some inexpensive Shimano rotors have less hardening and are designated "resin only." They in fact wear very fast if a metallic or semi-metallic ...


8

Just called Shimano to ask this question for a customer's bike. For switching from a resin to a metallic padset, the answer is clean rotor with isopropyl alcohol and do a standard bed-in. Didn't ask them about metallic to resin


8

tldr: be sure new rotor works with metal pads or get a set of resin pads. Generally, disk brake rotors of same diameter are thought of as cross-compatible, but there are some edge cases when this might not be true: Rotor thickness might not be the same across manufacturers and disk brake calipers might be designed with thicker/thinner rotor in mind. ...


7

Yes, this should work just fine. CenterLock and ISO six bolt wheels should be interchangeable w/o problems as long as they use the same rotor diameter.


7

Disc brake rotors with the six bolt design are attached with M5 fasteners. To shear off the head of a new M5 bolt requires a considerable torque. The design torque for medium resistance bolt is typically 5 Nm. It ought to take at least twice that torque before it fails so abruptly. A torque of 10 Nm is roughly equivalent to the weight force of 10 kg applied ...


7

TR160-35 is the model number. They are 160mm Centerlock rotors. If your new wheels have Centerlock hubs, then you need either centerlock rotors or adaptors. If the wheels are 6-bolt, then you need 6-bolt rotors. Either way you'll want 160mm rotors and to keep it easy, I'd stick with Tektro rotors for this system.


7

The cause is a missing aluminum shim between the centerlock lockring and the brake rotor. I removed the brake rotor from the defective front wheel. Then I removed a brake rotor from a known-good front wheel. When closely inspecting the lockrings, I noticed something the known-good front wheel has that the defective front wheel didn't: there was a very thin ...


6

Answering the question: To upgrade to 180mm from 160 you need a Post-Post 180mm adapter and a new disc. The adapters are widely available as 180 is probably the most common sized front disc on MTB's. I think the question that should have been asked is "My front disc is not working as well as I think it should, how can I make it better". As many say, its ...


6

Your best and safest option is to replace the rotor with a new one. Bend metal enough and it will deform permanently. In addition, rotors do wear away slowly over time. There's a chance yours is getting thinner, and more vulnerable to bending. Generally they're ~2 mm thick when new and unservicable at 1.6 mm thick. Finally, if your rotor has ...


6

Your brake is certainly not properly set up. Do not ride the bike in this state! The rotor's brake track must run fully between the brake pads. The radial dimension of both match. You rotor may be too small for the brake it its present set up, your wheel not properly inserted, or the brake caliper not mounted correctly. Check your brake's manual for ...


6

From what I can see, there is no serrated ring and the hub is not a disc-brake compatible one (for either center lock or 6-bolt rotors). Thus, for disc brakes you'll need a new wheel that mounts one or the other style of rotor. The rotor will cost probably an extra $20 or so if the wheel doesn't come with one. It's hard to tell from the photos, but your ...


5

You've gotta try it out to some extent (e.g. at your LBS). But you'll likely be able to do it with some spacers, tweaking of the brakes and some fidgeting and appropriate part selection. If you do it right, you should have minimal/no adjustment between swapping the wheelsets. It depends on the brakes and rotors you have. In some cases, the rotor will fit ...


5

This doesn't answer your question, but your problem before the question. If your brake body is moving about, the problem isn't the existence of the shim (which is used by all brakes when they upsize) but either: the bolts holding the shim/adapter to the bicycle or the brake to the adapter were not properly torqued and loctited. the bolts holding either ...


5

Rotors are wear items and therefore must be removable. The Cube website does not specify what rotors are fitted, but I strongly suspect they are Shimano Center-lock which have a steel rotor riveted to an alloy ‘spider’. They are fixed to the hub with a central lock ring. Changing the rotor will not improve braking performance, unless you are thinking of ...


5

Intermittent rub that corresponds to load received by the frame or fork doesn't have anything to do with how stiff the rotor or its connection to the hub is. It's the fork or frame being flexed, not the rotor. Usually the issue is caused by the air gap between the rotor and pads being too little, such that flex that would otherwise go unnoticed is causing ...


4

I can't add a comment yet so I provide this as an answer. The guy was bedding or burning-in the brakes. It makes sure the pads are seated and wiped of factory oil, grease, and other contaminants. Disc brake break-in? Sounds like he was doing it wrong. Unless the fact that the brakes weren't working after he did it indicates that the process uncovered a ...


4

A slightly warped or bent rotor may cause some brake pulsation. The rotor can be straightened with a Park tool DT-2 truing tool. I have had good luck using a large adjustable wrench. Close the jaws around rotor and gently bend the rotor. You most likely won't get it perfect but you can get it back to usable condition.


4

Normally the manufacturer of the brakes gives some minimum value for the rotor thickness. For higher prized brakes they often even provide some gauge that lets you easily check if the rotor is still thick enough. Typically the minimum thickness might be somewhere below 2mm (I believe to remember that the absolute minimum for Magura discs should be 1.7 or 1....


4

Advantages of smaller discs Lighter Less prone to damage Less prone to warping Advantages of larger discs Dissipate more heat More stopping torque The calliper and pad choices are more important than the disk as far as performance. Bigger discs increase performance cheaper than better callipers. At some point, bigger discs are needed to get enough ...


4

This is a common set up, as the majority of your stopping power is assumed to come from the front wheel, and many frames, especially older frames, had less clearance on the rear triangle of the frame, so often the 180mm rotor wouldn't fit. You can change it if you like, but there is little necessity to do so. If you choose to change it, you will only ...


4

Yes this will be fine. The only caveat I can think of is rotor thickness, if you look closely on a rotor or read the manual, you should be able to find the minimum thickness. This is different for different manufacturers but shouldn't affect a hydraulic disc brake, they automatically adjust for pad and rotor wear and will happily clamp a pair of new pads ...


4

Because you are buying new brakes - the best thing to do would be to store your old brakes in the same manner you receive the new brakes. And that would also be re-using the existing packaging. I'm sure the logistics in getting newly manufactured brakes from the production line to the retail counter / customer involves many months of transportation and ...


4

If you’ve ever stripped a torx bolt on a 6-bolt, you will have your answer for why people run centerlock. I will add a small disadvantage to centerlock is boost conversion on the rear. MRP sells kits for the front that use a caliper adapter to offset the rotor on the front, but nobody sells conversions for centerlock rears. You could in theory convert it to ...


Only top voted, non community-wiki answers of a minimum length are eligible