 |
Figure 3.
The customized BMX bicycle showing the non-circular chainring in 2 optimum chainring position or 119°, Yesspro chain tensioner and G-Cog electronic measuring device.
|
|
|
Figure 3.
The customized BMX bicycle showing the non-circular chainring in 2 optimum chainring position or 119°, Yesspro chain tensioner and G-Cog electronic measuring device.
|