Twitey's camping break - May 9th through 13th, 2024

[robgul]

I rode along the lane by the Wellesbourne airfiled today - just as they were running up the engines on the V bomber parked there* - the noise was amazing.

*they do it a couple of times a year - they used to drive down the runway and "abort the take-off" but it got too expensive to do with the amount of fuel it used.

[cycleman]

It turns out that the rear gear mech is a 10 speed now running a 11 speed cassette. Tame mechanic has attacked it with a hacksaw and file and the full cassette can be used effectively. My knees are pleased 

[chopstick]

That's interesting - I might be demonstrating ignorance but I presume that the 10 speed mech has the same total travel ability as an 11 speed mech and different cable pull requirement for indexing - which wouldn't be an issue with a friction non-indexed shifter - so was it the total amount of cable pull required to get the full range and was the filing done at the shifter end to allow a greater range of cable pull?

[Cudzoziemiec]

Some newer 10-speed mechs, I think the 10-speed 105 (4700?), use the 11-speed pull ratio. Is that what you have?

[Kim]

Interested how any change to the mech has solved the chain-dropping-off-the-top-of-the-sprocket problem...

[chopstick]

Oops! That's a point, Kim - searching to make sense of "the cure", I had overlooked what the actual problem was 

[cycleman]

Basically the mod changed the angle of the cable and increased the amount of pull available allowing proper engagement of the big cassette sprocket  I am running a friction system