How do I know if my derailleur is top or bottom pull?
Cable Pull Traditional front derailers are “bottom-pull”, operated by a cable running up from the bottom bracket area to the derailer. “Top-pull” derailers are operated by a cable running down from above.
What is top swing and down swing front derailleur?
Low clamp (aka top swing) This type of front derailleur mounts low down to a round seat tube with a band clamp. Because the clamp sits low on the frame (near the bottom-bracket junction) and the derailleur itself pivots above it, these are commonly also known as ‘top swing’ front derailleurs.
What is clamp on front derailleur?
“Clamp-On” front derailleurs come with a clamp of a specific diameter, which are meant to fit around different kinds of bicycle frames. Most frames will be either 28.6mm, 31.8mm or 34.9mm in diameter, but certain bikes made before the 1980s will have a slightly smaller tube diameter.
What are the types of front derailleur?
Front Derailleur Types And Mounts: Top / Down Swing, Side Pull, Direct Mount, E-Type…
Does SRAM front derailleur work Shimano?
Yes, you can mix Shimano and SRAM front derailleurs and shifters. It’s the rear derailleur that is not cross compatible, with the exception that SRAM has made ‘Attack’ shifters that will work with the Shimano rear derailleurs.
What is a bottom pull derailleur?
Bottom pull derailleurs – wait for it – refer to cable being pulled from the bottom. If your cable routing follows the down tube and then takes the cable past the bottom bracket, it’s a bottom pull.
What is the difference between braze-on and clamp on derailleur?
A clamp-on has a metal clamp that wraps around the tube of a frame that does not have a built-in mounting tab for the front derailleur. Braze-on derailleurs can be mounted to frames that do not have a mounting tab, using an adapter.
What is down pull FD?
Down pull/top pull refers to the direction the cable pulls the derailleur. i.e. a bottom or down pull has the cable coming up from under the bottom bracket. Most current derailleurs do both.
Can I mix Shimano and SRAM?
SRAM’s cassettes and chains are compatible with all of Shimano’s groupsets, and vice versa. Likewise, Shimano and SRAM buyers have the freedom to mix different levels of chains and cassettes so long as they are designed for the same kind of transmission.
Can you replace a SRAM derailleur with a Shimano?
Well-Known Member. It does not matter what motor the bike has; it is completely separate from the derailleur system. But Shimano and SRAM are not cross-compatible because they have different cable pull ratios. So in order to use a SRAM derailleur, the shifter also has to be replaced.
Is SRAM compatible with Shimano?
Do I need front derailleur?
Are Front Derailleurs Necessary? These days front derailleurs are essentially not necessary, on mountain bikes at least. Now even high-end road bikes are starting to lose their front derailleurs. With a larger rear cassette, it’s possible to get the same number of gears without the need for a front derailleur.