There's a three mile stretch around my house with a 700 ft climb. it's about 10% near the top and 3% at the very bottom. I've taken it before with my commuter bike riding the brakes. I've just got my SS cog installed on my fixie and was thinking about taking the hill. Going uphill would be a pain but coming downhill is exhililarting. The thing is, my commuter bike (built like a tank) feels like it's going to fall apart at around 40 mph.
What are some precautions that I should take? Is it safe to take a $600 bike downhill at 45+ mph? I've got a Jamie Roy btw.