Disc Brake Adapter

ryan2249 · #11 (**permalink**) 08-30-2009, 09:01 AM

Hey red I found a similar adapter for 24.99 BicycleDesigner: Your one stop source for lowrider bike and chopper. just tryin to save you a couple bucks if you havent ordered it yet

Ryan

Venice Motor Bikes · #12 (**permalink**) 08-30-2009, 11:31 AM

Quote:

Originally Posted by GeneFiorot

I have read that if you loosen your axle nuts and your front wheel can drop out of the fork on its own you should never equip that fork with a disc brake as the action of the braking pulls the axle out of the fork.

That doesn't make sense... Every factory bicycle I can think of that has a disc brake on the front, has a fork that allows the wheel to "drop" from the bottom!
I don't think any bicycle factory would sell a bike that the front wheel could pop off from using the front brake!!!

Also, the struts on many springer forks have a closed loop on the wheel end that wouldn't let a wheel "drop off".

To sum this up... I think front disc brakes are the best kind of brakes for stopping MB's, & will not cause any problems is installed properly. IMHO

GeneFiorot · #13 (**permalink**) 08-31-2009, 08:02 AM

It does say Quick release in this explanation. Although that was not in the original source that I had read. I am still looking for that source. But in any case this problem is cited more than one time. Whether it is a serious problem or not lends itself to the controversy that is also cited in the source. One can only consider it , look for more evidence of it , or ignore it to ones peril possibly. I only offered it as information and possible discussion. A defense of bicycle equipment manufacturers seems off the point.

Goat Herder · #14 (**permalink**) 09-01-2009, 09:10 AM

More links on this subject please? I don't see this clearly yet. My currant front disk brakes are of factory design down hill rock shock triple crown. Just woundring?

Venice Motor Bikes · #15 (**permalink**) 09-01-2009, 11:15 AM

Quote:

Originally Posted by GeneFiorot

It does say Quick release in this explanation. Although that was not in the original source that I had read. I am still looking for that source. But in any case this problem is cited more than one time. Whether it is a serious problem or not lends itself to the controversy that is also cited in the source. One can only consider it , look for more evidence of it , or ignore it to ones peril possibly. I only offered it as information and possible discussion. A defense of bicycle equipment manufacturers seems off the point.

My point in mentioning the bicycle manufacturers is this... They are so careful of possible lawsuits that they would never sell dangerous bikes that could have the wheels fall off during braking.

And as far as quick releases go; walk into any bike shop & tell me how many bikes with front discs also have a quick release??? (all of them!)

Yes, a wheel with a disc could come off if it's not tightened properly, but that's the rider/ users fault, not the disc brake!

GeneFiorot · #16 (**permalink**) 09-01-2009, 12:55 PM

As a dealer I would think you might be more open to the subject in light of easily available documentation. In any case others might be interested in the following:

Disk brake and Quick Release problem

Technical Q&A with Lennard Zinn - Funky Disco Drop-out - VeloNews

http://pdf.velocam.com/20030709_-_Bi..._loosening.pdf

Speaking of lawsuits have you paid your insurance? If he has not read it, I will point this out to Jim Manic Mechanic for his opinion. Maybe he will share his thoughts here.

Just_Gassit · #17 (**permalink**) 09-01-2009, 10:45 PM

Quote:

Originally Posted by Kevlarr

I can't see how that would happen. The torque applied at the disk would be no different then the torque applied by caliper brakes. If your axle nuts are tightened properly there shouldn't be any problem.

At first thought, this would sound crazy but if you think about it, with caliper brakes, the moment is traveling forward at the point the pads grab. Resulting force on the wheel would be rearward at the axle.

With a disc, the disc caliper is usually right behind the fork tube and the moment is traveling UP, not forward at the point of pad grip. The resulting force on the wheel is DOWN at the axle. It sounds a bit confusing at first but I'm sure an axle pull out is possible especially if the axle isn't very tight. If you are using a disc brake, check you axle nuts/quick releases often, keep them tight but don't over-tighten them either.

NEAT TIMES · #18 (**permalink**) 09-02-2009, 11:58 AM

Gene, I Understand The Idea. When You Stop The Wheel, The Caliper Could Be The Pivot Point.. Ron