Stages Cycling
Stages Left Crank Arm (000-7678) – SC1 & SC2
Stages Left Crank Arm (Part #000-7678)
The Stages Left Crank Arm is a precision-engineered replacement designed specifically for Stages SC1 and SC2 indoor bikes. This component is built to match the exact interface and fitment required for these models, ensuring proper installation and consistent performance.
If your non-drive side / left side crank arm is stripped, loose, or damaged, replacing it promptly restores safe, smooth pedaling and protects your drivetrain from further wear.
At Indoor Cycle Pros, we supply high-quality, spec-matched components trusted by boutique studios, gyms, and riders across the United States. This left side crank arm maintains the consistent ride feel your riders expect.
Direct-Fit Left Side Crank Arm Replacement for SC1 & SC2
This crank arm is engineered for high-use indoor cycling environments and built to match the original design and fitment of Stages SC1 and SC2 bikes.
- Exact-fit interface for SC1 & SC2
- Balanced and stable pedal stroke
- Reliable long-term performance in studio environments
Designed specifically for non-power meter configurations on SC1 and SC2 indoor cycles.
✔ Compatible Models:
- Stages SC1
- Stages SC2
⚠ Not Compatible with SC3
The SC3 uses a left-side power meter crank arm. If you are looking for the correct replacement, you can view the Stages Power Meter designed for Stages indoor cycles.
Why Left Crank Arms Fail on Stages Indoor Cycles
In our experience servicing hundreds of Stages indoor cycles, the most common reason a left side 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 typically happens due to improper pedal installation, overtightening, or frequent pedal changes in high-use studio environments.
It is important to note: the bottom bracket spindle interface itself does not wear out under normal conditions. In the vast majority of cases, the issue is isolated specifically to the crank arm threads.
- Pedal will not tighten securely
- Visible thread damage or metal shavings
- Pedal loosening during use
When thread damage occurs, replacing the crank arm is the correct solution. Attempting to reuse damaged threads can lead to unsafe riding conditions and further component damage.
If you’re unsure whether your issue is thread-related or something else, our team can help you confirm before ordering. Contact us at 949.922.7302, email sales@indoorcyclepros.com, or use our contact form.
Pro Tip: If you are replacing a crank arm due to thread damage, inspect your pedals before reinstalling. Worn or damaged pedal threads can quickly damage a new crank arm. Many studios upgrade to a dual-sided solution like the Exustar PS8 to improve the rider experience.
Built for Commercial Studio Performance
Stages indoor cycles are designed for high-frequency use, and this replacement component is built to meet the same demands. The SC1 and SC2 use a dedicated crank interface designed specifically for indoor cycling.
- Precision-machined interface
- Stable torque retention
- Consistent performance under daily use
- Uniform ride quality across all bikes
Expert Support from Indoor Cycle Pros
Indoor Cycle Pros specializes exclusively in Stages indoor cycles and replacement parts. Our hands-on experience allows us to guide you to the correct solution quickly.
- Spec-matched, direct-fit components
- Fitment confirmation before shipping
- Technical installation support
- Fast US shipping
- Worldwide fulfillment available
We support studios, gyms, universities, and home riders nationwide. If you are servicing multiple bikes, we can also help you plan preventative maintenance across your fleet. You can also explore our full selection of Stages drivetrain parts to keep your bikes running at peak performance.
Installation Guidance & Best Practices
Proper installation is critical for long-term performance. We recommend:
- Inspect crank arm splines before installation
- Confirm bottom bracket condition and torque
- Apply correct torque specifications
- Check pedal threads before reinstalling
Improper installation can lead to loosening or repeat failure. If you need help, contact our team before installing.
We also recommend inspecting related components such as the Stages bottom bracket and Stages right crank arm when servicing your drivetrain.
Indoor Cycle Pros maintains the largest independent inventory of Stages-compatible drivetrain parts and ships worldwide.
Order Your Stages Left Crank Arm Today
Have questions before ordering? Contact us directly at 949.922.7302, email sales@indoorcyclepros.com, or submit a request through our contact page. We’re here to help you get the correct part the first time.
Buy with confidence from Indoor Cycle Pros — your trusted source for Stages-compatible parts and expert support.
FAQs
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.
Indoor Cycle Pros ships new Stages bikes nationwide across the United States, and delivers Stages parts and accessories to clients worldwide.
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.
Absolutely not! Stages Cycling is thriving under the ownership of Giant Manufacturing Co., the world's largest bicycle manufacturer, established in 1972.
Yes, we provide ongoing support for Stages indoor bikes, including maintenance tips, troubleshooting help, and virtual or onsite service.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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