SYM |
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DRGBT 158 2nd Keyless |
DRGBT 158 2nd Keyset |
Pulley with special track design for rollers.
Depend on the riders’ requirement to adjust increase starting, middle acceleration and extend end speed performance.
With special berry red coating, endurable rubbing & high temperature, lower down the coefficient of friction, make rollers move smoothly, and make transmission reaction fast efficiently.