One of the mysteries of the English language finally explained.
A bicycle gear which works by lifting the chain from one sprocket wheel to another of a different size.
- ‘The other side of the rollers will now contact the gears, and the derailleurs will now be laterally bending the chain the opposite direction.’
- ‘Move your mouse over a photo of a mountain bike to select an area, such as brakes or derailleurs, and click to simple repair procedures.’
- ‘And while the rear derailleur has been difficult to perfect, the front derailleur has proven to be the real challenge.’
- ‘Then coat your bike's chain, derailleurs and pedals with a light lubricant.’
- ‘There's no barrel adjuster for the front derailleur, so eliminating derailleur rub in all gears is tough.’
- ‘Just changing the crankset will work, but the shifting will not be as crisp as with derailleurs for a double, due to the long derailleur cages and extra chain not meant for those size cogs and chainrings.’
- ‘I can't seem to adjust the front derailleur to the point that I can eliminate chain rub in all gear combinations.’
- ‘The derailleurs are shifted by flicking the brake lever sideways.’
- ‘My front derailleur and chain rings were so full of mud I couldn't change gears, so I was stuck pedalling in the big chain ring.’
- ‘If the chain is too long, the derailleur will rotate inward too far and bounce the upper jockey wheel through the chain on the largest cogs.’
- ‘The first thing that I would check, is the position of the front derailleur in reference to the front chainrings.’
- ‘The spacing between nine-speed cogs is so close that the derailleur has to move very precisely under each cog or the chain will try to climb to the next one.’
- ‘As for adjusting for cable stretch, as the cable stretches, the derailleur will move to larger cogs faster and slower to smaller cogs.’
- ‘There is no way to have two cables operating the rear derailleur.’
- ‘With just one lap remaining I was riding up one of the sticky mud climbs, when my derailleur jumped into my rear wheel, ending my race there and then.’
- ‘Unfortunately, the saddle, the derailleur and brake levers have black carbon.’
- ‘No longer must we rely on our clumsy thumbs to arbitrarily slam derailleurs into the proper speed.’
- ‘The derailleur is the device that changes gears by moving the chain from one sprocket to another.’
- ‘It would be lighter, and it would seem that it would shift faster, by virtue of short-cage derailleurs.’
- ‘I had the problem with both front and rear derailleurs.’
1930s: from French, from dérailler ‘derail’.
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