Road Bike Front Derailleur Types

This is the traditional standard type for most road bikes and older mtbs. The band on type uses a clamp or band that fits around the seat tube and is bolted securely. There are really only two types of road front derailleur mount and the band clamp type is becoming less common as the braze on can be bolted up to fit anything.

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There are two different types of braze on front derailleur interfaces.

Road bike front derailleur types. Derailleur gears are a variable ratio transmission system commonly used on bicycles consisting of a chain multiple sprockets of different sizes and a mechanism to move the chain from one sprocket to another. They feature fast shifting mechanisms self tensioning features high end bearings and carbon fiber fabrication. Top down swing. Ss short cage gs medium cage and sgs long cage.

One is commonly found on road bikes the other on mountain bikes. If a bicycle has a crankset with 48 38 28 teeth and a cassette that ranges from 11 32 teeth then a needed rd capacity would be. Front derailleur types and mounts. Road front mechs are attached to the bike in two ways band on or braze on.

Basic road bike build w shimano dura ace 9000 11 speed group. 1 1 4 31 8 mm clamp on for mildly oversized seat tubes. Diy cyclocross bike project replacing front derailleur duration. There are 5 different mounting types for front derailers depending on the seat tube diameter of your frame among other things.

The right hand gear shifter on the handlebars pulls a cable or uses electronic signals to move the derailleur which in turn moves the chain onto the appropriate cog on the cassette. A rear derailleur often referred to as a rear mech is the mechanism that moves the chain from cog to cog on the cassette at the rear of the bike. Road bike front derailleurs. Owing to the differences in tube diameters you will need to make sure your new mech has the correct clamp size some are provided with shims enabling them to be fitted to a range of tubes.

Shimano notes rds as. The dura ace and ultegra derailleurs are also compatible with electronic shifting. Shimano road bike derailleur compatibility all 11 speed shimano road components are inter compatible you could for example use a dura ace 9100 derailleur with a pair of 105 7000 shifters. Braze on front derailleurs bolt into a tab which brazed on the bicycle frame.

Although referred to as gears in the bike world these bicycle gears are technically sprockets since they drive or are driven by a chain and are not driven by one another. The top level mountain bike derailleurs offered by shimano are the xtr and saint while dura ace and ultegra round out the road bike derailleurs. A typical narrow ranged road cassette and two front chainrings will make do with a short cage derailleur. 1 1 8 28 6 mm clamp on.