PARK TOOL CC-4.2 Chain Wear Indicator

$29.99

In stock

Product Highlights

Drop-in style gauge
Laser cut CC-4.2 accurately measures a long section of chain
Strategically comes in contact with the chain in three places
Two-sprocket (single-speed) chains: replace chain at or just before 1.0%
5-to-10-speed chains: replace chain at or just before 0.75%
11-to-13-speed chains: replace at or just before 0.5%

Frequently Asked Questions

What is the purpose of the PARK TOOL CC-4.2 Chain Wear Indicator?

The CC-4.2 accurately measures chain wear, helping you determine when to replace your chain for optimal performance.

How does the CC-4.2 measure chain wear?

It uses a drop-in style gauge that contacts the chain in three places, providing precise wear measurements.

When should I replace my chain using the CC-4.2?

Replace single-speed chains at 1.0%, 5-10 speed chains at 0.75%, and 11-13 speed chains at 0.5% wear.

Is the CC-4.2 compatible with all chain types?

Yes, it works with any 5 to 13-speed derailleur chain and single-speed chains.

How can I extend the life of my cassette?

Change your chain frequently using the CC-4.2 to prevent excessive wear on your cassette.

Free Shipping $100+

Free shipping on all orders over $100 (before tax)
All orders are processed within 1 business day
Orders ship from our warehouse in Guelph, ON
Free shipping ranges from 2-6 business days depending on location within Canada
Expedited shipping options (which ranges from 1-3 business days) are available at checkout upon entering your shipping address
We ship with most major couriers, including Canada Post, UPS, Fedex, Purolator, Canpar, and ICS
Full shipping details can be found in our shipping policy

Returns & Exchanges

If your NOMAD purchase isn't quite right for you, you may return it for a refund within 30 days from delivery
Return items must be unused and accompanied by all original packaging, with both product and packaging in an undamaged state and all product tags intact
Refunds will be issued to your original form of payment within 2-5 business days of receipt of items at our distribution centre
We cannot accept returns or exchanges of the following items:
- Nutrition products
- Gift cards
- Water bottles
- Personal care items, such as body creams and lotions
- Items marked as clearance or final sale
Return shipping fees are the responsibility of the customer
Full return details can be found in our return policy

PARK TOOL CC-4.2 Chain Wear Indicator

A worn bicycle chain causes poor shifting performance and can actually wear out drivetrain components, causing more expensive problems. The Park Tool CC-4.2 Chain Checker is a drop-in style gauge that measures bicycle chain wear. The laser-cut CC-4.2 accurately measures a long section of chain and strategically comes in contact with the chain in three places, quickly and easily taking the guesswork out of determining when chain replacement is necessary. The tool works on any 5 to 13-speed derailleur chain (including SRAM® T-Type, SRAM® Flattop™, Shimano® XTR® 12-speed, and Campagnolo® Ekar™ 13-speed chains) or single-speed chain, and is designed to accurately indicate when a chain reaches 0.5%, 0.75%, and 1.0% wear, the points at which most chain manufacturers suggest replacement.

Chains and cassettes wear together, but you can prolong the life of the more expensive cassette by changing your chain more frequently.