(2) Super Turf Tire Assemblies 18x9.50-8 Fits Cub Cadet RZT 50" 54" 634-04128

What It Is

This is a set of two 18x9.50-8 Super Turf tires pre-mounted on rims, designed as a direct replacement for Cub Cadet RZT zero-turn mowers with 50" or 54" decks. They provide traction and flotation on turf without damaging grass.

Fitment & Compatibility

• OEM part number: Cub Cadet 634-04128 (replaces 734-04128).
• Fits models: Cub Cadet RZT 50 (e.g., RZT 50, RZT 50 S, RZT 50 FAB) and RZT 54 (e.g., RZT 54, RZT 54 S, RZT 54 FAB). Also compatible with some LTX and Z-Force models—verify your deck size and axle type.
• Measurements: Tire size 18x9.50-8; rim size 8x7 (4-bolt pattern, 4" bolt circle).
• Before buying: Check your mower’s current tire size (stamped on sidewall), bolt pattern (measure center-to-center across opposite bolts), and hub diameter. Aftermarket alternatives may vary in tread depth or load rating.

Key Things to Know

• Quality: OEM-grade construction with 4-ply rating; good puncture resistance for residential use.
• Installation: Direct bolt-on—no additional hardware needed. Requires a 3/4" socket and torque wrench (45-55 ft-lbs).
• Common gotcha: These are not for older Cub Cadet models with 5-bolt hubs or smaller 16x6.50-8 tires. Also, the turf tread is less aggressive on wet grass compared to A/T tires.
• Durability: Treads last 2-3 seasons under normal use; sidewalls are stiff but not reinforced for heavy commercial loads.

Should You Buy It

Yes, if you own a 2010+ Cub Cadet RZT 50 or 54 and want a hassle-free, OEM-fit tire that maintains lawn appearance. Skip if you need more aggressive traction for slopes or commercial-duty durability.