Technical FAQ: Powertap tire selection and cleaning of the brake disc

• Lennard Zinn
• Published 7 hours ago

Dear Lennard,
Currently I have a wheel CycleOps Powertap rear unit (brake wheel) Pro. It is a center of 32 spokes attached to a CycleOps tire, I think it could be a well-known speed aluminum rim. But I wanted the front, nice build rimmed to a corresponding pair of wheels coals again, keep PowerTap hub. Most carbon rims, who seemed less holes such as 18, 20, 24 count. Know a carbon rims 32 holes already know? Not really run or TT, so I have nothing to do with a deep profile and I am less concerned about weight.

Secondly, assuming that it seems a consistent carbon rim, I can make a bladed spokes Sapim spoke like? I think I've heard you can not use regular radios tied a model for centers PowerTap. I wonder if you happen to know the truth?
- Juan

Dear John,
Here is the answer of Rich Sawiris, owner and founder of Wheelbuilder.com expert on tires and make them with PowerTap hub.
- Lennard

"No great options for carbon road wheels 32H, but it is possible to replace the hub body in a hole Pro Powertap for Distinct Count. We still have a few shells around the Shop Pro model, the transfer of an existing torque tube for allowing a smaller number giving rays. A counter 24H more options for carbon rim from all major manufacturers.

Apartment radios are compatible with PowerTap hub, if the large blade 2.6 mm or less. The most popular options are the models DT Aerolite, Sapim CX-Ray and DT Aerocomp. The PowerTap hub requires 2 Minimum cross pattern on the flange of the drive side, but it is recommended that both flanges. Normally binds us with 2X loop hub 24H and 32H to 28H hub or 3X cable ".

Dear Lennard,
Technical, cleaning, etc. - you can advise on cleaning road bikes with disc brakes? The way I clean my bike be associated with grease or dirt on my skates before (and again Squeak strong production and reduced power braking) a few laps after my cleaning appears. My guess is that my LBS with detergent and water to clean the frame may be the cause of the problem. More generally, with the growth of disc brakes on road bikes, it might be a VeloNews be of great interest to readers in an article about a good cleaning disc brakes for road bikes. At least it would be of interest to the reader.
- Todd

Love Todd,
Here are the answers to a number of heads of the disk brake products.
- Lennard

Joel Richardson FSA (formerly Hayes):
"The surest way to clean the bike would remove the front and rear wheels, remove the brake pads and the drain spacers that come with the brakes. This will ensure when cleaning that the platelets and the discs are not contaminated . The corset prevent caliper pistons pumped rinse if to hit the brake when cleaning.

"Well, that's a bit of a process and a disadvantage when the user clean your bike after every ride. Most manufacturers recommend, disc brakes isopropyl alcohol to clean the rotor and disc brake components. None but mild soap and warm water is also acceptable . In this sense, I suspect that soap and water are not the cause of the noise for your player. In contrast, fat and dark road, water and soap to wash the bike and the gear, making their way to the rotors and / or brake pads. If that's the case, then the brake pads are replaced and must be cleaned prior to rotor.

"Another possible cause for noise and power dissipation refers to restoration. The material of the brake pads on the rotor surface transferred and in turn creates the necessary friction to stop the motorcycle. It is possible, some eliminate these documents with soap and clean brush. On the journey along the pads to noise and power they would be low until completely back lapping process. If power is not returned and the noise continues after good saves 15-20 10mph when the pads dirty.

"Equipped Basically, disc brake mountain bike since 1998 with water and soap and never had a problem to get the soap related.

"Another, perhaps together to the maintenance training. Mountain bikers have learned that we must be careful to clean and lubricate be the chain and derailleurs. Cleaners overspray or spray lubricant can easily through the spokes in giving the rear rotor. The next time the brake is applied, these pollutants are transferred to the brake pads, and it's time for new pads.

"I hope this helps to be used with the spine. As a cyclist, for shade disc brakes. With the introduction of disc brakes street, we have a new group of drivers who are not aware of all the advice that you may have been arrested in the past 17 years . "

Eric Schutt, media director for Hayes:
"When you wash a bike with disc brakes, we recommend the use of isopropyl alcohol to clean the rotors. It to avoid cleaning agents, chemicals, lubricants or contact Brake rotor disc and pads is best. If I wanted to go a step further, you can clean lint-free cloth to clean the shoes. You can use a towel through the slot in the brake caliper and remove to clean the electrodes. "

Stefan Pahl, director of product Magura:
"We have seen no disc brakes on the streets, but with disc brake mountain bike and they must be identical.

"We recommend rotors with soapy water and a brush clean clean. But we can also use disc cleaning sprays or alcohol. Be sure to use clean cloths or towels!

"Be careful with the use of brushes or sponges to clean with soap and water, which are not specific and could have some fat transfer or waste oil. This can contaminate rotors / pads.

"Pads contaminated, especially with organic compounds must be replaced. The oil or fat is absorbed by the pad material like a sponge, the buffer is never the same after cleaning.

"Another piece of advice: Be careful when you get lubricating the chain when using aerosol mist Never leave oil in the rotor.".

"Some own bike aerosols oil or other lubricants that shine for cycling and repel water. The rotors and pads also pollute."

Bryce Olson, customer service representative for the PRT:
"Cleaning and washing of a road bike with disc brakes, certainly has problems when it comes to pillows and free from contamination discs. Undoubtedly the best way to shout buffer as possible to avoid it, your shoes before removing washing the motorcycle. While taking a few extra steps, and a little more, but it's the best way to avoid the question. Each pad which is wet, if contaminated or not, rather a dry surface for a while shouting to dry. We have no concrete scientific evidence and our experience in the use of a special bike wash, instead of soap is less likely to cause noise problems. Finally, the rotors cleaned separately after washing the motorcycle with isopropyl alcohol to all residues or contaminants before the use of pills is recommended to help the pads clean and free of contaminants to be removed. "

Filed under: Bicycles and Tech / FAQ Technical TAGS: Technical FAQ

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