Originally Posted by
kjohnnytarr
Why not put that cog on a little axle, and mount the axle to a clamp on the chainstay? You wouldn't have to worry about it falling out, and you could adjust tension by sliding the clamp forwards and backwards.
I wouldn't want anything clamped to any modern thin-tubed chainstay.... especially if it is getting torqued.
As you move forward, the pressure would torque down on the chainstay and as you brake, it would torque up. I could see this destroying a bike very quickly.