“Replacing with good quality cables on a regular basis is a great help to better shifting,” says Matthew Potter, a technician and neutral service mechanic at Shimano Australia. It’s why electronic drivetrains are said to be so ‘set and forget’, as they just don’t suffer from these cable woes. If your cables are old, dirty, rusted, kinked or just poor quality, then they’re likely hindering that shift – replacement is the answer. If the cable ain’t slick, give it the flickĪ mechanical drivetrain relies on the cable being as drag free as possible. Notably, a bent derailleur hanger is common cause for what can seem like a wacky limit adjustment (more later). It’s something that Dylan Coulson of SRAM Australia Dealer Service Direct sees as a common cause for poor shifting on 1x drivetrains. How to adjust the gears on your bike – videoĪnother to consider is B-tension, which adjusts the rear derailleur body angle (or more simply, the height gap between the derailleur and cassette).Too often people wrongly play with these screws when shifting goes bad. Limit screws set the extremes for which a derailleur can travel. In the simplest of terms, sluggish upshifts can be caused by too little cable tension while slow downshifts could be too much tension. Cable systems wear and ‘stretch’, and will inevitably lead to a loss in shifting precision. Indexed drivetrains rely on correct cable tension so that the shifters pull the derailleur to the intended spot. The most obvious and common causes for poor shifting are down to poor adjustment and the most common thing to go out of adjustment is cable tension.
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