Compact

Options for a super-compact crankset for touring (replacing Shimano 105 crankset)

Options for a super-compact crankset for touring (replacing Shimano 105 crankset)
  • 3941
  • Joseph Lyons
  1. Are cranksets interchangeable?
  2. What is the difference between a compact crankset and standard?
  3. Are Shimano chainrings interchangeable?
  4. Do all cranks fit all bottom brackets?
  5. Do pros use compact crankset?
  6. Is compact better than standard?
  7. Should I get a compact crankset?
  8. Can I change chainring size?
  9. Are longer or shorter cranks better?
  10. Are shorter crank arms better?

Are cranksets interchangeable?

No, cranks are not generally always interchangeable, but you probably can transplant the crank from the broken bike. ... Older or lower end 'three-piece' cranks use a bottom bracket that includes the axle and are threaded into the frame, the crank arms fit into a square or splined taper on the end of the axle.

What is the difference between a compact crankset and standard?

A compact crank refers to a road bike crankset with relatively smaller chainrings that can make pedaling easier. While 'standard' cranks come with a 53-tooth large chainring and a 39-tooth small ring, compact cranks usually feature 50- and 34-tooth rings.

Are Shimano chainrings interchangeable?

Largely speaking, yes. As long as your attempting to replace them with a chainring(s) designed to work with your chainset. ... CHAINRINGS AND CRANKSETS Thus, cranks from Shimano, SRAM, and Campagnolo are freely interchangeable along with those from all aftermarket brands (e.g. FSA, Rotor, Praxis, etc.).

Do all cranks fit all bottom brackets?

Crankset compatibility

In general terms, most cranksets can be fitted to a variety of bottom bracket shells, though much of this compatibility depends upon the availability of suitable hardware (see next section). Any incompatibilities that do arise are often related to the length and/or diameter of the crank axle.

Do pros use compact crankset?

As already mentioned, pros will use compact cranks on serious climbing courses. It is important to remember that the pros are not like us. Their power to weight ratios are extremely high--much higher than even you see at even the elite amateur level. So, they don't need gearing as easy as mere mortals most of the time.

Is compact better than standard?

Most people are not going to be able to travel at those speeds riding solo, so a compact is a good choice for those who do a lot of solo riding.
...
Low Speeds.

Top Speed w/ 11t (mph)Low speed w/ 26t (mph)
Standard41.4 (110 rpm)9.4 (80 rpm)
Compact39.1 (110 rpm)8.2 (80 rpm)
Difference2.31.2

Should I get a compact crankset?

In short, a compact chainset will give you some small gears for keeping moving up steep hills while a 53/39 chainset will allow you to keep the pressure on for longer on fast descents. A semi-compact gives you some small gears, but not as small as a compact, and some big gears, but not as big as a 53/39 chainset.

Can I change chainring size?

You can only change the chain in 2 tooth increments and almost always you can change a ring by 2 teeth and not need to change the chain length.

Are longer or shorter cranks better?

Crank length changes may help solve long-simmering aches and pains, but they're most effective when you're doing everything you should be doing to be strong on the bike. It changes gearing. If you do end up changing crankarm lengths, it will change your gearing as well.

Are shorter crank arms better?

A shorter crank length for the shorter triathlete will give all the above benefits and more, as less leverage will encourage a higher cadence saving their legs for the run. A lower aero bar position is achievable as knee tracking at the top of the stroke is improved.

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