How do you remove an aluminum seatpost from a steel frame?
One of the methods is to heat the aluminum seatpost and then to let it cool. In theory, the aluminum will expand twice as fast as steel and hence the expansion/contraction should crack the bond. Some recommend using a blow torch or even boiling water.
How do I remove a bolt from a bike seat?
So a lubricant like liquid wrench or WD40 may help loosen them. Heat can help but you need to get it very hot like with a torch. Perhaps if you cut the rails of the saddle you bang them out with a punch.
How do you remove aluminum from steel?
While HCL would attack the aluminum violently, it will also effect the steel to some degree. Sodium hydroxide would be the best choice. Definitely use Caustic soda (Sodium Hydroxide) to kill the aluminum.
Are bike seat posts universal?
While there are any number of post diameters out there, most modern road and MTB bike frames accept a seatpost of either 27.2mm in diameter (‘standard’), 30.9 or 31.6mm (‘oversize’). You can use a shim to enable a 27.2mm seatpost fit into a frame taking a larger standard, but not vice-versa for obvious reasons.
How do you secure a bike seat post?
To secure the seatpost, you replace the current quick release clamp with the pinhead seatpost/saddle lock. To secure the saddle, you clamp the same Pinhead lock to the top of your seatpost where it blocks access to the normal hex key you’d need to loosen to get the saddle off.
Does caustic soda dissolve Aluminium?
Alkali is safer for the stainless than acid, and is very widely used to dissolve aluminum. Sure, caustic soda is a “hazardous chemical” to be handled with respect, but let’s not overstate it: For the rest, caustic soda is the only affordable way to do the deed.
How high should my bike seat be?
Place your heel on the pedal and pedal backwards to reach the six o’clock position. Your knee should be completely straight. If your knee is still bent you need to increase the height, adjusting in small increments each time, and if your heel loses contact with the pedal then you need to lower the saddle.