could someone tell me the difference between these autotrac chains and the z chain (or super z6) made by the same company?

Auto-trac are actual chains (in a diamond pattern). SCC-brand Z-chain (and super Z6) are cables type chains. All meet S-class for thickness, while the Super Z6 are 6mm. The Z-chains and Super Z-6 have a diagonal pattern, and which wire is wrapped by the steel cable, which bites into the snow and ice. Auto-trac, as the name implies are auto-tightening and self-centering. Super Z6 requires rubber tensioners. Z-chain does not, but needs to be retightening after you drive them for a short distance.

How many chains to an order?

Just a correction concerning a previous answer; my manual for the 2019 all wheel drive RAV4 says to only use chains on the front axle. I think it is that way for some other AWD vehicles too. Check your manual.

waht does "Series 1500 - 155505" means?

I think it is the manufacturer's series, possibly a typo by Amazon, which wouldn't be a first. Just order based on tire size and it should be fine. You can double check with the manufacturer website to ensure ordering the right part number.

I order peerless 1500-0155305 for my 235/60r16 all terrain tires. its very hard to connect the last hook. is that normal? or should it have more slack

It should have more slack. Make sure your locks are not on "lock" position. I had accidentally snapped them into lock position while installing. Once I unlocked them I was able to give it more slack and attach the last hook.

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SCC Security Chain Peerless 0155505 Auto-Trac Tire Traction Chain - Set of 2

Product ID: 305134764

Details

Brand
SCC
Global Trade Identification Number
Item weight
11.5 Pounds
Material
Alloy Steel
Vehicle service type
Car

🔗Patented ratcheting tension system

🛞Manganese alloy steel cross members

⏱️Install/remove in minutes

€ 287.05

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Description

❄️ Drive Confidently, Even When the Roads Don’t!

SUPERIOR TRACTION - Diamond pattern cross chains grip better for a smoother, safer ride.
AUTOMATIC TIGHTENING - Patented ratcheting system tightens as you drive for perfect fit.
LIGHTWEIGHT DURABILITY - Manganese alloy steel links reduce weight and wear for long-lasting performance.
EFFORTLESS INSTALLATION - Get rolling in minutes—no jacks, no hassle.
UNIVERSAL FIT COMPLIANCE - Meets Class 'S' clearance for SUVs, pickups, and cars—ready for any winter challenge.

The SCC Security Chain Peerless 0155505 Auto-Trac Tire Traction Chain set offers quick, tool-free installation with a patented ratcheting system that tightens automatically while driving. Crafted from durable manganese alloy steel, these chains provide superior traction and a smoother ride with a diamond cross pattern. Designed to meet Class 'S' clearance, they fit SUVs, pickups, and passenger cars, ensuring reliable winter road performance with lightweight, long-lasting construction.

Specifications

ASIN	B0091RCINU
Automotive Fit Type	Universal Fit
Brand Name	SCC
Compatible with Vehicle Type	Car
Country of Publication	USA
Customer Reviews	4.1 4.1 out of 5 stars (1,348)
Global Trade Identification Number	00042228082536
Included Components	Tire chain
Item Type Name	Tire chain
Item Weight	11.5 Pounds
Manufacturer	Peerless Chain
Manufacturer Part Number	0155505
Material Type	Alloy Steel
Model Number	0155505
Number of Items	2
UPC	042228082536
Unit Count	2 Count

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TrustScore 4.5 | 7,300+ reviews

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€ 287.05

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered 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 Portugal.

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TrustScore 4.5 | 7,300+ reviews

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