Is this tool for 8 speed bikes.

Yes. All modern bicycle chains have 1/2" spacing, or pitch, between pins. This tool will work on an 8-speed chain.

This gauge has two measurements, 0.5 and 0.75, I have a 7 speed mountain bike. Which measurement should use for when it is time to get a new chain?

My understanding is that a 7-speed drivetrain can tolerate much more wear than newer 11- and 10-speed. My understanding is that 11-speed needs 0.5%, 10-speed is 0.75%. I would personally also use 0.75% for 9-speed, although I have gone farther to 1% without trouble in the past. But for a 7-speed chain you can certainly go to 1% wear before changing a chain. I'm sure there are chain wear tools out there that measure the larger 1% wear than this one. But if you use this one for a 7-speed chain, in my opinion you can consider the 0.75% level an early warning sign to replace the chain.

Where is this Park Tool made?

The package says USA. Based on what I learned from my bike mechanic, this is not the best choice. He showed me something that cost around $20 and just drops in and seems a little better. A chain gauge by ProGold seems like the one he has.

Alright, I must of missed something! Just what in tarnation does the size of a man's... cassette have todo with the condition of his chain?

The size of your cassette has nothing to do with the chain condition. Size doesn't matter, but using a 11X21 cassette would make you more manly! In this case the smaller the cassette the more manly ..... as opposed to the other thing .....

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Park Tool CC-3.2 Bicycle Chain Checker 5-12 Speed

Product ID: 2161598

Details

Brand
Park Tool
Item Highlight
Park Tool Wear
Item Weight
0.27 g
Item dimensions L x W x H
3.25 x 0.25 x
Material
Metal

📏0.5% & 0.75% precision wear check

🔧Durable metal build with lifetime warranty

⚙️Fits 5-12 speed chains seamlessly

Rp581207

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚴‍♂️ Stay ahead of the ride—measure chain wear like a pro!

TRUSTED BY PROS - Backed by Park Tool’s limited lifetime warranty and a 4.8-star rating from over 3,000 cyclists worldwide.
COMPACT LIGHTWEIGHT - Slim 3.25-inch tool fits easily in your kit or pocket for on-the-go maintenance.
GO NO GO GAUGE SIMPLICITY - Intuitive design instantly tells you when it’s time to replace your chain—no guesswork needed.
PINPOINT CHAIN WEAR DETECTION - Accurately measures chain stretch at 0.5% and 0.75% thresholds to prevent costly drivetrain damage.
UNIVERSAL SPEED COMPATIBILITY - Engineered to fit all 5-12 speed bicycle chains, ensuring versatile use across your bike collection.

The Park Tool CC-3.2 Bicycle Chain Checker is a precision metal gauge designed to measure chain wear at 0.5% and 0.75% levels, compatible with all 5-12 speed bike chains. Compact and easy to use, it features a go/no-go indicator to help cyclists maintain optimal drivetrain performance and avoid premature wear. Trusted globally with a limited lifetime warranty and top customer ratings, it’s an essential tool for every serious rider.

Specifications

ASIN	B000BR3LHQ
Best Sellers Rank	#16,461 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #31 in Bike Shop Tools
Brand Name	Park Tool
Customer Reviews	4.8 4.8 out of 5 stars (3,132)
Global Trade Identification Number	00763477001344
Included Components	Chain Tools
Item Dimensions	3.25 x 0.25 x 11 inches
Item Highlight	Park Tool CC-3.2 Chain Wear Indicator - Accurate 0.5% & 0.75% Check for 5-12-Speed Bike Chains
Item Type Name	Tools
Item Weight	0.27 g
Manufacturer	PARK TOOL
Material Type	Metal
Model	CC-3.2
Number of Items	1
Part Number	150892
Thread Style	Unc
UPC	763477001344 744288052985
Unit Count	1 Count
Warranty Description	Limited Lifetime Warranty

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Rp581207

Duties & taxes included

In stock

Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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