Dogtrousers
Kilometre nibbler
Good, innit?This was an interesting discussion of the show and has now become an argument about cables.
What's more, it's a pedantic argument about cables. I don't think anyone thinks that steel cables actually literally get stretched by the forces of a shifter and a derailleur spring. But the term is used as shorthand for a bit of slack coming into the system as things bed in.
As @steve292 says, once set up right an indexed system doesn't need to be touched at all for many thousands of km, and the chain should never come unshipped (barring accidents).
But one of the riders dropped her chain repeatedly, and this can only be due to her bike being wrongly set up. That must have been really frustrating for her. They had a lot to learn in that short period, and dealing with bikes set up cack-handedly shouldn't need to be on the list..
My gut feel is that maybe a bit of mechanical sympathy on the part of the rider might reduce the chances of the chain coming off. Possibly changing rings while cross chained, or changing rings without backing off the effort might make it more likely to lose your chain. But really, you should be able to do both those things (even if they aren't an ideal way to ride) and not lose your chain.
The other thing that surprised me about the program was how generous the cutoff on the Étape was. The only people I know who've entered things like this are hardcore speedsters, and I assumed that hill trundling and walking would leave you doomed to being swept up. Makes me think even I could do it. (Not that I'm about to try).
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