- Joined
- Jun 2, 2003
- Messages
- 23,591
The driveshaft is made of 12mm solid carbon steel, about 38 cm long. Each end has a threaded hole and a collared (?) transmission gear is bolted to the driveshaft.
Yesterday, while making quite some power uphill (~20° incline), the driveshaft sheared off without warning. I didn't feel the driveshaft "go soft," I simply lost propulsion. So far I have put about 8k miles on the bike. All transmission parts have a lifetime warranty, so getting a replacement part is no issue. I am however wondering about the cause of the driveshaft failure and the probability of it happening again. I suppose an engineer can gleam some info by looking at the images that I posted. Any comments or suggestions?
Are my legs simply creating too much torque?
Yesterday, while making quite some power uphill (~20° incline), the driveshaft sheared off without warning. I didn't feel the driveshaft "go soft," I simply lost propulsion. So far I have put about 8k miles on the bike. All transmission parts have a lifetime warranty, so getting a replacement part is no issue. I am however wondering about the cause of the driveshaft failure and the probability of it happening again. I suppose an engineer can gleam some info by looking at the images that I posted. Any comments or suggestions?
Are my legs simply creating too much torque?