A bicycle rim includes a substantially H-shaped outer part including an annular body and two sidewalls. The arrangement comprises a guide wire cable having a cleaning end and a feed end, a brush or some other tool being connected to the cleaning end of the guide wire cable, and a drive unit connected to the feed end of the guide wire cable, the arrangement further comprising transmission means for moving the brush by means of the drive unit. In quiescent and small signal situations with respect to the differential input signal, the auxiliary circuit does not alter or change operation of the differential amplifier. The operations also include comparing the first output with the second output to determine if the first number of bits is greater than the second number of bits. The cap central reference area includes a recess formed by cutting a part of the front edge on the cap top side of the supporting segment. The operation of the first component is triggered by the incoming compressed image data.