Difference between revisions of "PVD Two-by-Two"
From Pvdwiki
| Line 6: | Line 6: | ||
==What makes PVD's special== | ==What makes PVD's special== | ||
| − | With the PVD setup, the chain does not have to be re-tentioned when the gear is changed. This is accomplished by having near identical center to center distances on the gears. This can be done by going through a bunch of calculations. see: [[Chain_Length_Calculation Chain Length Calculation]] | + | With the PVD setup, the chain does not have to be re-tentioned when the gear is changed. This is accomplished by having near identical center to center distances on the gears. This can be done by going through a bunch of calculations. see: [[Chain_Length_Calculation Chain|Length Calculation]] |
==Example== | ==Example== | ||
Revision as of 14:56, 24 December 2007
What is Two-by-Two?
Some call it double-double or dos-dos.
This system consists of two single speed gearings mounted side by side. To change gears, the wheel is removed, the chain moved latterally front and rear, and the wheel is replaced. Typically, the chain needs to be re-tentioned.
What makes PVD's special
With the PVD setup, the chain does not have to be re-tentioned when the gear is changed. This is accomplished by having near identical center to center distances on the gears. This can be done by going through a bunch of calculations. see: Length Calculation
