I was thinking about thatAs long as it's apart, treat yourself to the most effective upgrade you can do for the $$ and install Dr. Pully Sliders instead of the OEM rollers. Which, by the way, NEVER ROLL, but slide, leading to flat spots...
I weighed the set in my 2013 GT, 33 gr, the 30 gr Dr Pulley will help off the line acceleration without much loss of top speed, the biggest benefit of the Dr Pulley is the shape. The wedge shape and sliding allows the variator to get "smaller" (ramp of the wedge allows the two sides of the "pulley" to get closer making the pulley act smaller) then as the RPM increases the wedge travels higher, making the "pulley" larger to move more surface of the belt, moving the driven wheel faster. Heavier weights move to the outside easier (higher speed) while lighter weights move in easier (quicker acceleration) but their lighter weight hinders their movement out (loss of top speed).I was thinking about that
What is the weight of the OEM rollers?
Are the 30 gr dr.pulleys good ??
This describes 95% of my riding. I installed 28 gram Dr. Pulley sliders (and you need the four insert pieces) and was very pleased with acceleration and mid-range.if all my riding were stop and go, short trips and limited highway I would have used lighter weights for better acceleration
Did the lighter rollers increased rpm at same speed?This describes 95% of my riding. I installed 28 gram Dr. Pulley sliders (and you need the four insert pieces) and was very pleased with acceleration and mid-range.
Honestly couldn't tell you. I find the BMW tach system lacking, if not annoying. The horizontal bars in steps of 1,000 rpm's is imprecise and hard to read at speed. My general sense is the new sliders didn't have much effect on rpm's.Did the lighter rollers increased rpm at same speed?
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