![]() Crushing the very small tolerances in the bearing will quickly destroy it, just like tightening your oldskool bottom bracket or headset too tight and feeling resistance. The same holds true in skateboard bearing spacers, inline, etc, where the spacer holds the bearing from pressing all the way in to the wheel. This leaves the force of vertical weight to be applied vertically, not diagonally. You are leaving a gap so there is no lateral pressure on the bearings by the pressing of the crank arm -> bearing -> spacer <- bearing <- crank arm. You are only losing 5-10% of the contact area on the cup to shell interface, which is more tolerable than destroying the bearings. Not 1-2mm, 1.53mm to 0.76mm - those allowances are acceptable with a 12mm wide bearing, which means the cup should have that same contact area. ![]() Why would they not advise to get a flush fit preferably but if there is a slight 1-2mm gap to not worry? Is this correct? I have always thought the bearings should fit flush in the BB so they can't move around under load? I understand the need for the spindle sleeve but don't agree with leaving this gap.Ĭan someone possibly shed some light on this? I have included pictures of where they say this in these guides as below and both full guides can be found in the "The Best of BMX Restoration" section on here. This is because these guides say the spindle sleeve needs to restrict the bearing cup from sitting flush in the BB keeping the bearings from binding when the crank arms are tightened. When installing the left non-drive side bearing the guides to the install similar bearing set such as Profile 3 piece cranks and Poverty 3 piece cranks (there is no new Redline Flight guide I am aware of) both say you should have approximately a 1-2mm gap between the BB shell and the bearing cup when the left bearing is installed. I'm installing my first set of new Redline Flight cranks with a Redline sealed bearing set.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |