Forums New posts. What's new New posts New media New media comments Latest activity. Media New media New comments Search media. Members Current visitors. Log in Register. Search titles only. Search Advanced search…. New posts. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Currently just available in XTR, electronic gears use an electric wire instead of a mechanical cable.
Cable pull direction is not a part of the electronic derailleur decision. Looking back a decade, nearly all mountain bike front derailleurs attached to the frame via a band clamp. Where band clamps remain popular, they are now far from standard. New suspension designs, frame tube shapes and material thicknesses have forced brands to re-think the front derailleur attachment point.
This is the most traditionally common of the mountain bike front derailleurs. It mounts low down to a round seat tube with a band clamp. You need to be aware of your seat tube diameter.
Most commonly, these derailleurs now come in a Wrapping around the seat tube at a much higher point than the low clamp, the high clamp derailleur has become popular on many full suspension frames or where bottom bracket clearance is limited. On some frames with a consistent seat tube diameter, the use of a high clamp or low clamp front derailleur is completely interchangeable.
Generally speaking, the low clamp type offers greater water bottle cage clearance, a cleaner look, and is a lighter option if it fits your bike.
Fast becoming a popular choice on the modern mountain bike, the direct mount derailleur features a single attaching bolt and a grove on its back to keep it aligned with the frame mount. In order to fit one of these, the frame must feature an appropriate mount. See our gallery above for an example of what this mount looks like. This pre-dates current direct-mount designs and was filler for when brands started to move away from traditional band clamp derailleurs. Following the direct mount above, this is the next most common form of direct-mount derailleur and features two bolts It shares the same S2 derailleurs are not commonly used.
This is characterized by a Unlike the bewildering choice of mountain bike front mechs, road bike front mechs are all bottom pull ie. So the first rule is that you must use the same brand as your current set up or intended shifter.
Sometimes going up a level is actually not as good as subtle difference in chainrings can affect the shift quality. Obviously if you want to you could upgrade your chainrings at the same time as your front mech, if for example the whole lot is a bit worn out. As modern chains get narrower to accommodate more and more cassette sprockets, front mechs have also changed width slightly.
You will need a front mech that corresponds with the number of gears on your current groupset for it to work best ie. The majority of road groupsets have two front chainrings double but if you have three you triple you will need a different front mech.
Triple mechs three front chainrings have a larger rear plate than a standard mech as this helps the chain cope with the bigger change in chainring sizes from a very small front ring to a very large front ring.
0コメント