What is the difference between clamp on and braze on

Simply, a dual pull derailleur allows the cable to be routed from either the top or bottom. The Side Swing derailleur which, as the name suggests, swings sideways was designed out of a need for increased clearance due to wheel and tyre sizes forever growing. The derailleur standard hopes to remove compromises frame manufacturers must make to chainstay length, chainring chainline and tyre clearance in order to fit a front derailleur.

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. My steel and TI frames are Thanks everyone. This is the answer I was hoping for. Since I have been thinking of going with a chain catcher no Schleck repeat here the last one looks really slick. I am going to order up the group tomorrow with a braze on FD.

Thanks again. Last edited by djg21; at PM. Thanks Djg21 -your second read was correct. I think my explanation was not very clear. Find all posts by sean. I prefer adapters to braze-ons. Post by vmajor on Sun Jun 21, am. Privacy Terms.

Join us on. Only valid for active forum users. Active means at least 30 postings within the last 30 days no spam postings. This will automatically being checked at www. Tip: clamp size is usually written on the inside of the band. Braze on: the mech mounts directly on to a small tab on the frame. Ironically this type used to be mostly found on old steel frames but has come back on modern carbon frames as the tab does away with a band clamping round the frame which could lead to potential damage to the carbon and it also frees up the seat tube area for oversized tubing design.

They are available in a range of sizes, shapes and colours to suit all needs, tastes and budgets. With modern chains getting thinner and the rise of compact chainsets meaning mechs have a bigger jump between chainring sizes, the likelihood of the chain falling off the chainrings especially on the downshift has increased a bit. To overcome this problem a small catcher arm can be installed on the inside of the mech which prevents the chain from dropping off between the small chainring and the frame SRAM have even built one into several of their front mechs as standard.