much less friction. Especially when the derailleur gets dirty, traditionall pulleys gets quite sticky the original plastic pulleys are already very light, the weight is roughly the same. Seems like the dirt stays out of the ball bearing caps, great. i bought it just for because of the look, but i was impressed by the friction difference. Those little ... Read more
using a sram powerlink to split the chain it only took about one minute to fit.the adapter supplied is for shimano so did not use it.i have done about 100 miles with it and it still looks like new. also it looks sweet. delivery to uk was quick also i really can not see any cons. only how long it lasts,but only time will tell. price great
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