Sequence Boundary The sequence boundary is an unconformity updip and a correlative conformity downdip. Where it is an unconformity, it is a surface of subaerial exposure and erosion; however, the expression of those features in an individual outcrop may or may not be obvious.
The brushless motor provides greater reliability and efficiency for its low weight and size as compared to the brushed motors. Efficiency for the brushless motor is typically between 85-90% while that of the brushed motor ranges between 75-80%.
Stands for Shimano Pedaling Dynamics and refers to any of Shimanoâs clipless pedals though the terms SPD and spud are usually used to refer to Shimanoâs mountain bike clipless pedals. tension adjustment. A screw or bolt on the pedal that allows you to adjust how hard it is to get in and out of the pedal.lipless pedals keep your feet in place making it easier to pedal at a good cadence (the speed you pedal measured in revolutions of one pedal per minute; a good goal is 70 to 90rpm).