|   Single Speed rear disc set-up w/photo | GA-SS
Sep 16, 2002 3:39 AM | | http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1859038823
Check out this link above. The disc brake adapter threads on the opposite side of the hub as the freewheel on a flip flop hub.
It looks like a great idea that someone put a lot of work into, but.... If you were rolling backwords, doing a track stand, or doing a little trials hop. etc. Wouldn't the force of the back pressure unthread the adapter for disc rotor? A lock ring could solve that... |
| It could unthread | shiggy
Sep 16, 2002 7:47 AM | | I would not use it if I was going to do alot of trials riding.
"The disk brake setup is really well machined, very professionally done,..." It is from Atomic Labs, designed for BMX bikes. Cost is about $60 for the IS mount and the rotor mount (rotor mount alone for ~$12.) The biggest consern for me it the stresses on the dropout. The only thing that keeps the mount from turning is the keyway that fits into the dropout. The forces in XC riding are pretty high not to have some sort of solid support like a strut to the seatstay. Then again it may work just fine. |
| It could unthread | itsdoable
Sep 16, 2002 8:25 AM | | As mentioned above, it's an AtomLab BMX disc adapter, and I've been running one on my SS with the same hub for almost 2 years. Because there is a bit of play in the keyway, I had to put a torque bar from the caliper to the canti dropout to prevent the adapter from rotating on the horizontal mount. Other than that, it works like the Pauls unit at half the price.
It does unthread if you apply a large rear brake force - not for trials. And it requires a *front* iso caliper.
I'd post a picture of my setup, but I haven';t figured that part out yet... |
| only if riding backwards? | dgoodisi
Sep 16, 2002 8:28 AM | | The process of braking tightens the adapter onto the thread, no?
If I recall you tighten freewheels on clockwise, same with the adapter.
When traveling forwards the wheel (from the adapter's side) is spinning counter-clockwise, using the brakes applies a clockwise rotation to the adapter, tightening it. |
| only if riding backwards? | itsdoable
Sep 17, 2002 5:12 AM | | That's hard 'reverse' braking forces, the disc comes loose - like the type you do when hopping around on your rear wheel trials like...
It's also came loose while I was holding myself up on a steep incline waiting for the trail to clear, the result of which caused much amusement. |
| |
