#16
|
|||
|
|||
Discs
On 16/11/17 20:38, David Scheidt wrote:
Tosspot wrote: :Why do they have holes in them? :Car discs don't, motorbike discs don't, aircraft discs don't. Why do :bicycle discs have them? Lots of high-performance car brake rotors are drilled or slotted. Slotting is more common on better stuff, holes can crack. They serve a couple of features. One, people think they're cool. two, they allow the gasses that come off brake pads somewhere to go (this is a non-issue with modern pads, but it was a problem in the dark ages). Three, they give water somewhere to go. Four, they improve cooling (increase surface area). five, the clean pads, and reduce wear. Gasses off a bicycle pad? Really? Nobody drills rims, and most[1] motorbikes, which are exposed to the rain don't. Because 75 kg of me at 30 kph is the same KE as 160 kph Audi at 1.5 tonnes? Nah. Hmmm...could it be it helps to clean them? They aren't dissipating the KE, so they don't get Eeek! hot. But surely the crud would build up in the holes? I'm going to order a solid one for the front and fit it in the spring and see if it makes any difference. [1] In deference to John B. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Vented Discs | Ben C | Recumbent Biking | 35 | June 29th 09 02:26 AM |
Cable discs | Tim Hall | UK | 13 | June 18th 09 11:56 PM |
Rollo-Discs | Unisykolist | Unicycling | 5 | December 5th 08 01:34 AM |
discs vs V brakes | ODB | Australia | 31 | October 23rd 06 08:37 AM |
new to discs - squeeky when wet ! | Steve Walton | UK | 6 | November 21st 04 01:46 PM |