I see that a EU company is converting x.0 twisters to work with a x.x cassette (using a x.0 rear derailleur). This is very cool, but their price is very high, especially for those of us who live on the other side of the pond.
Tore apart my x.0 twist shfiter tonight. It doesn't look like it would be all that hard to convert to 10s.
The purpose of this thread is to discuss what it would take, kick around ideas, and hopefully have someone try this out.
Basics: The shifter must turn the same amount and pull the same amount of cable as it does now (the X.X cassette is the same width end to end as a 9 speed cassette, just with more gears packed into the same space. There need to be 9 detents in the ratchet ring in the shifter instead of the 8 that there are now. The first and last detent remain in the same position, but the ones in between need to be closer together and an extra detent added.
Possible Approach: The existing plastic piece with the detents in it will be very tough to modify to work for the 10 speed cassette - the existing detents would need to be filled and new ones cut precisely. What about dremeling out that section of the housing, creating a new part with the 10 speed detents, and bolting it in place by mounting it the same way the window currently mounts? This would make it possible for someone to manufacture a plastic piece that could be sold to others that could be retrofitted pretty easily by cutting out the existing plastic and bolting the new piece in. Sounds like a pain, but it would not need to be surgically neat, since the bolt holes used to mount it (the window holes) would ensure it was aligned perfectly.
I suspect that once a prototype is made manually and a CAD file is created, we could get these manufactured for very cheap (or someone could do all the work and sell them - I'd buy one).
I am not sure how the company that does this already approaches this problem, but they do eliminate the window, so maybe they do something similar?
Tore apart my x.0 twist shfiter tonight. It doesn't look like it would be all that hard to convert to 10s.
The purpose of this thread is to discuss what it would take, kick around ideas, and hopefully have someone try this out.
Basics: The shifter must turn the same amount and pull the same amount of cable as it does now (the X.X cassette is the same width end to end as a 9 speed cassette, just with more gears packed into the same space. There need to be 9 detents in the ratchet ring in the shifter instead of the 8 that there are now. The first and last detent remain in the same position, but the ones in between need to be closer together and an extra detent added.
Possible Approach: The existing plastic piece with the detents in it will be very tough to modify to work for the 10 speed cassette - the existing detents would need to be filled and new ones cut precisely. What about dremeling out that section of the housing, creating a new part with the 10 speed detents, and bolting it in place by mounting it the same way the window currently mounts? This would make it possible for someone to manufacture a plastic piece that could be sold to others that could be retrofitted pretty easily by cutting out the existing plastic and bolting the new piece in. Sounds like a pain, but it would not need to be surgically neat, since the bolt holes used to mount it (the window holes) would ensure it was aligned perfectly.
I suspect that once a prototype is made manually and a CAD file is created, we could get these manufactured for very cheap (or someone could do all the work and sell them - I'd buy one).
I am not sure how the company that does this already approaches this problem, but they do eliminate the window, so maybe they do something similar?
)
