boxterew.blogg.se - New bike chain too long

#New bike chain too long full

The Full Suspension Factor: Setting up your bike with the proper chain length isn't a difficult task, but the job does become more complicated if you ride a full suspension bike. This means that a new derailleur necessitates checking chain length.

Derailleur cage length varies between Shimano and SRAM, and there can even be differences between different model years of the same derailleur.

Just because your bike is brand new from the shop doesn't mean that its chain length is correct.

New bikes will often ship from the factory with a stock chain length that is far too long.

This setup puts the onus on the rider to not shift into such a gear in order to prevent damage, but is done to add chain tension when in more common gearing combos to limit noise and the chance of losing a chain.

Advanced riders on bikes with double or triple ring setups will sometimes purposely run the chain too short for the bike to fully bottom when in the big cog and big chain ring combo.

Even so, it is best to set chain length when in the big and big combo simply because it isn't uncommon to accidentally shift into such a gear by accident when out on the trail.

While today's 10-speed, dual chainring setups can often be ridden in the big ring and big cog combo ( otherwise known as being 'cross geared'), it isn't recommended for bikes with triple ring cranksets.This will tell you the maximum chain length required. It is important to determine chain length on a full suspension bike when it is in its fully compressed position, and with the chain in the largest cog and chain ring. The term 'chain growth' refers to the distance between the bottom bracket and rear axle lengthening as the bike goes through its travel.In short, the wrong length derailleur cage will make determining proper chain length nearly impossible. Using a short cage derailleur on a bike with a very wide gearing range ( a triple crankset, for example) will require a chain that is overly long to compensate for the lack of capacity in the derailleur's short cage, while the opposite is true of a long cage derailleur on a bike that doesn't necessitate it - there will be no happy medium setup. This is because of the massive difference in chain slack when in certain gearing combos on bikes with three rings and wide range cassettes, while bikes with only a single chain ring can often get away with a short cage derailleur. The general rule of thumb is that the larger the gearing range, the longer the derailleur cage needs to be. Derailleurs are available with short, medium, and long cage lengths depending on what your bike requires. Its hanging cage and pulley wheels take up the chain's extra slack when in small cog and chain ring gearing combos, but the spring-loaded cage can also rotate forward to compensate for added chain tension when you are in a larger sized cog or chain ring.

It's fair to say that a bit of carelessness when it comes to chain length can quickly make for an expensive repair bill.ĭerailleur Cage Counts: Your bike's rear derailleur also plays an important role in managing chain length. Worst case: you could not only rip off your bike's derailleur hanger or destroy the chain and derailleur itself but even bend over the chainring due to the massive forces involved.

The best case scenario is that your bike will refuse to shift to the larger sized cogs or chain rings due to too much chain tension. While an over-length chain can cause some annoying issues, one that is too short can be downright catastrophic. In fact, it is so common that there is a good chance that many of the bikes on your local shop's showroom floor are sporting too long of a chain, an oversight from the factory that can often lead to dropped chains or inconsistent shifting. Length Does Matter: Chain length is one of those important setup points that often gets overlooked both when building up a bike from scratch, or when replacing a worn chain.