Why Do Spin Bike’s Have A Fixed Gear And What About Smart Release?

Fixed Gear for Spin Bikes  chains and cogsOne thing you notice when first new to spin bikes and indoor cycles is just how many of them have a fixed gear. Unlike with outdoor bikes where most give you the ability to coast with only a minority of bikes having a single fixed gear it is the other way round with spin bikes.

What Is Fixed Gear?

A fixed gear means the pedals and flywheel are “fixed” together. When the flywheel is in motion the pedals are turning so there is no coasting. The spin bike flywheel continues to turn due to the inertia of its heavy weight which helps to pull through the pedals the fully cycle to give a fluid riding motion and helps to keep the cadence (RPM) up especially at low resistance levels.

What Is Smart Release?

There are some bikes that use a technology called Smart Release which does give you the ability to coast. You apply some pressure backwards on the pedals and it releases the connection between the pedals and the flywheel so the pedals stop turning while the flywheel continues on.

Smart Release – Costs And Benefits

The obvious benefits of the smart release includes that it is easier to get off the bike, it doesn’t take any getting used to and there is no pedals bashing into your legs.

It can save your joints when you are trying to stop especially the knees and ankles as you aren’t pushing against the force generated by the flywheel (you aren’t supposed to stop the flywheel like this to avoid injuries).

From a fitness point of view it is easier to coast and you may not get the full benefits of a workout by taking it too easy. Especially at lower resistance levels you may coast and not get the benefits of the higher cadence you can achieve. You miss out on the cardio benefits as well as the chance to burn off some calories.

Bikes with this technology do cost more with it being included on more expensive models and there were no bikes below $1000 that I could find.

The ride on these bikes can sometimes be not as smooth nor as natural as you get with a fixed gear bike, also if not properly maintained the pedals can slip which you definitely don’t want when you are up out of the saddle.

There is more maintenance required on these bikes to keep the Smart Release properly adjusted otherwise it makes the ride uncomfortable. It’s not difficult but you do need to be tightening or releasing it to keep everything working properly.

In fact some people find the ride is just not what they want due to the variation it can cause that they tighten it up so that the bike becomes a fixed gear bike effectively.

At present the only bike I’ve looked at in detail for home use that has this technology is the Schwinn AC Sport which is 1 bike out of 25. It is a very good bike overall and if you want the benefits of this bike you do have pay extra for it. The bike comes with magnetic resistance.

Fixed Gear – Pros And Cons

It can be hard to imagine there are any pros to a fixed gear when you first get on the spin bike and you realize that you just can’t stop pedaling and get off the bike.

You have to wait for the flywheel to stop or push the emergency brake when you need to get off quickly.
The cons of the fixed gear is that it takes some time to get used to, you have to be careful when getting off the bike that you don’t injure yourself with the pedal hitting your leg or trying to stop the pedals turning with your legs causing an impact injury.

The advantages over the smart release bikes are that there is less maintenance requirements and on the whole costing less on a like for like basis for example a comparable bike to the Schwinn AC Sports the Sole SB900 comes with a console too.

There are some training advantages and fitness advantages. This is the reason that the bike is popular specialist spin bike and indoor cycling companies. (See http://sheldonbrown.com/fixed.html for a good explanation of outdoor bike fixed gear). It comes down to the fact it is easier to get more out of the workout than you would if you had the option for coasting especially as your reduce the resistance.

As you reduce the resistance you can increase your cadence to get more of a cardio workout helping to increase speed, agility and a smoother cycling motion all adding to improved fitness levels as well as burning off more calories. You are getting the maximum benefit from the bike whether increasing or decreasing the resistance.

So, spin bikes and indoor cycles have a fixed gear because they are cheaper to manufacture, require less maintenance and push you harder. You don’t have the opportunity to coast as you can with a bike with Smart Release technology.

They can be difficult to get used to at the beginning and you have to be careful when stopping not to cause injury as you slow down or step off the bike.

After a few rides with fixed gear you might become a fan and even want it on your outdoor bike too.

7 comments for “Why Do Spin Bike’s Have A Fixed Gear And What About Smart Release?

  1. January 8, 2016 at 7:59 pm

    Thanks for this post as I’ve been considering a spinner while not being fully convinced fixed gear is the way to go. Your article makes a lot of sense, more than many others I have already come across. Now I’m more inclined to give it a go.

    • Paul
      January 8, 2016 at 8:49 pm

      Thank you for this. It’s great to hear you found it useful.

  2. Peter G
    April 12, 2016 at 5:41 pm

    What the article fails to state is that if the bike has a freehub, it causes you to work HARDER bc you DON’T have the momentum of a 40 lb. flywheel moving your legs during the pedal upstroke! So you are working LESS with a fixed gear during half of the pedal stroke.

  3. DDearborn
    June 14, 2018 at 1:30 pm


    Old article worthy of an additional comment.. Other than pure sprinting and children’s bikes, actual bikes COAST for a whole host of very good reasons.

    The suggestion that removing that capability is somehow better, either from a “work out” perspective or “feel” perspective is pure marketing rubbish. Indoor bikes as a whole, and the higher end bikes in particular, enjoy massive profit margins for the industry. One of the primary reasons is because they don’t have to provide actual gearing and the ability to coast. In addition, they all use either cheap mild steel or aluminum frame construction. Adding the capability to coast, let alone actual gearing/derailers that would stand up to the stress of daily workouts would raise costs significantly. And given that good indoor bikes are already very expensive, almost impossible to pass on to the consumer. The whole idea people is to make money, lots of money. Effective marketing, using ploys like the article here, has conned an entire generation…….

    Riding a fixed peddle indoor bike is very different than an actual outdoor bike. And as Peter G states, it does NOT provide a more effective workout.

    • Paul
      August 24, 2018 at 3:51 pm

      Thanks for adding your insight on the fixed gear. Do you have a link to Peter G’s comments on this please?

      • Blott
        May 7, 2023 at 7:46 pm

        Peter G’s comment is the one before the one you are replying to.

        • Paul
          August 8, 2023 at 6:03 pm

          Thanks. I see that now.

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