Stages Left Crank Arm Part No. 000-7678 compatible with SC1, SC2, and SC3 indoor cycles

Angled view of Stages Left Crank Arm 000-7678 for SC1 SC2 and SC3 indoor cycles

Opposite angle view of Stages Left Crank Arm 000-7678 replacement assembly

Side profile of Stages Left Crank Arm Part No. 000-7678

Opposite side profile of Stages Left Crank Arm compatible with SC1 SC2 and SC3 bikes

Rear view of Stages Left Crank Arm showing self-extracting crank bolt

Rear angled view of Stages Left Crank Arm replacement assembly

Exploded parts diagram showing Stages Left Crank Arm Part No. 000-7678 for SC1, SC2, and SC3 indoor cycles

Stages Cycling

Stages Left Crank Arm (000-7678) – SC1 & SC2

Name: Stages Left Crank Arm (000-7678) – SC1 & SC2
Brand: Stages Cycling
Price: 99.95 USD
Availability: InStock

~~$169.22~~ $99.95 Save 41%

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Stages Left Crank Arm 000-7678 for SC1 & SC2 Indoor Cycles

The Stages Left Crank Arm Part No. 000-7678 is a direct-fit replacement left crank arm for Stages SC1 and SC2 indoor cycles. It installs on the non-drive side of the bike and is commonly replaced when the pedal threads become stripped, worn, cross-threaded, or damaged.

This left crank arm uses the crank and bottom bracket interface required for Stages SC-series indoor bikes, helping restore secure pedal installation, smooth pedaling, and consistent ride feel.

Product Specifications

Part Number: 000-7678
Product Type: Left crank arm / non-drive side crank arm
Primary Compatibility: Stages SC1 and SC2 indoor cycles
SC3 Use: Can be installed on an SC3 only when power measurement functionality is intentionally being removed
Installation Side: Left side / non-drive side
Removal Tool: 8mm Allen key or preferably 8mm Allen socket with ratchet drive

Direct-Fit Replacement for SC1 & SC2

The 000-7678 Left Crank Arm is designed as the standard left crank arm replacement for Stages SC1 and SC2 indoor cycles. If your left crank arm is stripped, loose, damaged, or no longer holding the pedal securely, replacing the crank arm is the correct repair.

Direct-fit replacement for Stages SC1 and SC2
Restores proper pedal installation
Helps maintain a smooth and stable pedal stroke
Suitable for high-use commercial studio environments

SC3 Owners: Please Read Before Ordering

All Stages SC3 indoor cycles were originally equipped with a Stages Power Meter assembly on the left side of the bike.

The Stages Left Crank Arm Part No. 000-7678 does not include an integrated power meter.

Although the 000-7678 utilizes the same crank and bottom bracket interface and can physically be installed on an SC3, doing so will eliminate rider power and cadence data.

Some SC3 owners choose the 000-7678 as a lower-cost alternative when a failed Stages Power Meter no longer justifies the cost of replacement and rider performance data is no longer required.

If you wish to retain rider power and cadence data on your SC3, purchase the Stages Power Meter 971-0105 instead.

Why Left Crank Arms Fail on Stages Indoor Cycles

One of the most common reasons a left crank arm needs replacement is damage to the pedal threads. The female threads inside the crank arm, where the pedal installs, can become worn, cross-threaded, or stripped over time.

This often happens due to improper pedal installation, overtightening, repeated pedal changes, or continued use after the pedal has started to loosen.

Pedal will not tighten securely
Pedal loosens during use
Visible thread damage or metal shavings
Clicking, knocking, or movement at the pedal connection
Pedal installs at an angle or will not thread in cleanly

When thread damage occurs, replacing the crank arm is the proper solution. Attempting to reuse damaged threads can create unsafe riding conditions and may damage the pedal or drivetrain further.

Important Pedal Inspection Note

If you are replacing a crank arm due to thread damage, inspect the pedal before reinstalling it. Damaged pedal threads can quickly damage a new crank arm.

Many studios use crank arm replacement as an opportunity to inspect or upgrade their pedals. If your pedals are worn, loose, or difficult to install, replacing the pedals at the same time may help prevent repeat crank arm damage.

Installation Notes

The Stages Left Crank Arm uses a self-extracting crank bolt design. A separate crank puller is not required.

Before removing the crank arm, always remove the left pedal first using a pedal wrench or 15mm wrench. Once the pedal has been removed, use an 8mm Allen key or preferably an 8mm Allen socket with ratchet drive to loosen the self-extracting crank bolt.

Continue loosening the crank bolt until the crank arm fully disengages from the bottom bracket spindle. The self-extracting mechanism will remove the crank arm as the bolt is loosened.

When installing the replacement crank arm, verify that the crank arm is fully seated on the spindle before tightening the crank bolt to the manufacturer’s specification. After installation, reinstall the pedal carefully and confirm the pedal threads engage smoothly.

If you are not familiar with crank arm replacement procedures, professional installation is recommended.

Recommended Tools

Pedal wrench or 15mm wrench
8mm Allen key
Preferably 8mm Allen socket with ratchet drive

Related Parts to Inspect

When replacing the left crank arm, we recommend inspecting related drivetrain components to confirm the issue is isolated to the crank arm.

Support from Indoor Cycle Pros

Indoor Cycle Pros specializes in Stages indoor cycling equipment, replacement parts, and service support. Founded in 2023, Indoor Cycle Pros was established by Andrew Sandoval, who has supported Stages indoor cycling programs since 2015.

We help studios, gyms, universities, hospitality fitness centers, and residential owners identify the correct Stages replacement parts and avoid unnecessary repairs.

Frequently Asked Questions

Will this left crank arm fit my Stages SC1 or SC2?

Yes. The Stages Left Crank Arm 000-7678 is designed as a direct-fit replacement for Stages SC1 and SC2 indoor cycles.

Can this crank arm be installed on an SC3?

Yes, but only if you intentionally want to remove power measurement functionality. All SC3 bikes originally use a Stages Power Meter assembly on the left side. The 000-7678 uses the same crank and bottom bracket interface, but it does not include an integrated power meter.

Will this restore power and cadence data on an SC3?

No. This crank arm does not include a power meter. If you need to restore rider power and cadence data on an SC3, purchase the Stages Power Meter 971-0105.

Why would an SC3 owner install this instead of a Power Meter?

Some SC3 owners no longer need rider performance data and choose the 000-7678 as a lower-cost alternative when replacing a failed Power Meter assembly.

What is the most common reason this part needs replacement?

The most common reason is damaged pedal threads. If the pedal will not tighten securely or repeatedly loosens during use, the crank arm threads may be stripped or cross-threaded.

Do I need to remove the pedal before replacing the crank arm?

Yes. Always remove the pedal first using a pedal wrench or 15mm wrench before loosening the crank bolt.

What tool removes the crank arm?

The Stages Left Crank Arm uses a self-extracting crank bolt. Use an 8mm Allen key or preferably an 8mm Allen socket with ratchet drive to loosen the crank bolt until the crank arm disengages from the spindle.

Do I need a crank puller?

No. The self-extracting crank bolt removes the crank arm as the bolt is loosened.

Should I inspect my pedals before installing the new crank arm?

Yes. Damaged pedal threads can quickly damage a new crank arm. Always inspect the pedal threads before reinstalling.

Order the Stages Left Crank Arm 000-7678

If you have questions before ordering, contact Indoor Cycle Pros at 949.922.7302, email sales@indoorcyclepros.com, or use our contact form.

We can help confirm whether you need the standard left crank arm, the Stages Power Meter assembly, pedals, or another drivetrain component before you place your order.

FAQs

Who is Indoor Cycle Pros and what do you specialize in?

Indoor Cycle Pros is the official direct distributor of Stages Cycling commercial indoor bikes for U.S. studios. We specialize in helping boutique studios and gyms source, maintain, and service their bikes with expert support and prompt access to Stages parts.

Do you ship Stages bikes and parts internationally or just in the U.S.?

Indoor Cycle Pros ships new Stages bikes nationwide across the United States, and delivers Stages parts and accessories to clients worldwide.

Why does Indoor Cycle Pros only sell Stages Cycling bikes?

We exclusively carry Stages Cycling indoor bikes because Stages is the only fitness brand 100% focused on commercial indoor cycling. Unlike other manufacturers that produce treadmills, rowers, and ellipticals, Stages builds only indoor cycles—resulting in the most advanced and durable bikes on the market for studio use.

Is Stages Cycling out of business?

Absolutely not! Stages Cycling is thriving under the ownership of Giant Manufacturing Co., the world's largest bicycle manufacturer, established in 1972.

Do you offer ongoing service and support for Stages indoor bikes after purchase?

Yes, we provide ongoing support for Stages indoor bikes, including maintenance tips, troubleshooting help, and virtual or onsite service.

Do you offer financing on your Stages indoor bikes?

Yes, our finance team has supported studios and gyms since 2015 with the most competitive options for financing Stages bikes. To get started, fill out our Contact Form.

What’s the difference between the Stages SC2 and Stages SC3 indoor bikes?

Both the Stages SC2 and Stages SC3 bikes share a commercial-grade frame but differ in rider features. SC2 is ideal for rhythm riders; SC3 for performance tracking and metrics.

SC2 Highlight: Black pop-pin adjustment knobs, RhythmBar™ handlebars, no console.
SC3 Highlight: Blue FitLoc™ levers, RoadBar™ handlebars, EcoSCRN console, and built-in power meter.

What pedal comes with a Stages bike?

Each Stages bike includes a dual function pedal that offers both SPD cleat compatibility on one side and a toe cage with an adjustable strap for standard athletic shoes.

Can I add a Stages Display Console to a Stages SC2 indoor cycle?

No, the Stages Display Console is only compatible with the Stages SC3, which contains the required internal generator. The Stages SC2 does not support console connectivity.

Can I upgrade the height adjustment Stages FitLoc Lever on my Stages bikes to the Stages Pop-Pin with Knob?

Yes, you can upgrade your Stages FitLoc Lever to the Stages Pop-Pin with Knob! You will need a 2mm Allen, a 2.5mm Allen, and a 3mm ball-end Allen wrench.

How do I replace a Stages Power Meter?

To replace your Stages Power Meter Crank Arm (which includes the entire left crank arm with integrated power meter), follow the step-by-step instructions below using the proper tools and supplies.

🔧 Tools & Supplies Needed

8mm Allen wrench or 8mm Allen socket with ratchet drive (recommended)
Park Tool HPG-1 High Performance Grease
Park Tool PW-4 Professional Pedal Wrench (or equivalent)
Loctite 243 (blue threadlocker)
TitanFlex heavy-duty nitrile gloves (or equivalent)

🛠️ Step-by-Step Instructions

Wear Gloves
Put on nitrile gloves to keep grease and threadlocker off your skin.
Remove the Pedal
Use a pedal wrench to remove the pedal from the existing crank arm.
- Left pedal = reverse-threaded (turn clockwise to loosen)
Remove the Existing Crank Arm
Use an 8mm Allen wrench or socket with ratchet to turn the crank bolt counter-clockwise.
- This is a self-extracting bolt — it will loosen and automatically remove the crank arm.
Clean the Spindle
Wipe the bottom bracket spindle's splines and internal threads clean using a dry cloth.
Apply Grease and Threadlocker
Apply a thin coat of Park Tool HPG-1 grease to the spindle splines and a small drop of Loctite 243 to the internal threads of the spindle.
Install the New Stages Power Meter Crank Arm
Slide the new crank arm onto the spindle so it is 180° opposite the right crank arm.
Tighten the Crank Bolt
Thread the crank bolt in by hand, then firmly tighten with your 8mm wrench or ratchet.
Reinstall the Pedal
Thread the pedal back into the new crank arm.
- Left pedal = reverse-threaded (turn counter-clockwise to tighten)
Final Check
Ensure both crank arms are 180° apart, the crank spins smoothly, and all bolts are secure.

What is the best way to clean my Stages bikes?

For the Stages bike frame, use a diluted solution of Simple Green at a ratio of 1:30 (1 part Simple Green to 30 parts water). Spray onto a microfiber cloth and wipe the entire frame including crank covers. Dry with a clean microfiber cloth.

What tools do I need to service a Stages indoor bike?

Stages indoor bikes use only metric tools. Never use fractional tools. For a complete tool guide, email us at sales@indoorcyclepros.com and we’ll provide access to our Stages Bike Tool Kit.

How do I adjust the saddle angle on my Stages indoor bike?

Use a 13mm open end wrench or 13mm socket with ratchet to loosen each side of the saddle clamp, make your adjustment, then re-tighten evenly. Check out our Stages saddles collection.

How do I replace the batteries in my Stages Power Meter?

Use a quality #0 Phillips screwdriver to remove the tiny screws on the battery cover of your Stages Power Meter. Replace the AA batteries, ensuring the correct +/− orientation. For a tighter fit, wrap a layer of electrical tape around each battery.

How do I know if my Stages Power Meter needs to be replaced?

Find the 5-digit ANT ID on your Stages Power Meter. While pedaling, open the StagesPower app and check for a matching device. If no connection occurs, press the reset button for 3 seconds, try again, and replace AA batteries if needed.

Do you offer studio design and buildout services?

Yes! Our design and buildout team can help bring your studio vision to life. Fill out our Contact Form and we’ll reach out to get started.