THALOUS Oversized Bike Seat Backrest Memory Foam Cushion, Black&Grey, With Backrest — Wide PU Comfort for Upright Riding

THALOUS Oversized Bike Seat Backrest Comfort Memory Foam Universal is a padded, high-density PU and latex backrest that attaches to most straight seatposts to reduce pressure and support upright riding.

This accessory converts a standard bicycle saddle into a more supportive, cushioned seat with an integrated backrest. Designed with a broad memory foam cushion and a reinforced carbon-steel connector, it aims to improve comfort on city rides, long commutes, and light off-road outings. The assembly includes mounting hardware and works with seatposts that match common straight-tube dimensions; curved or unusually shaped posts are not compatible.

Will this backrest fit my bike's seatpost?

The backrest fits most straight seatposts whose narrowest end (where the post meets the saddle) measures about 0.87 inches (22 mm) in diameter. It is not suitable for saddles without a clear seatpost tube, curved seatposts, or irregularly shaped mounting rails.

• Compatible with standard straight seatposts (~0.87 in / 22 mm narrow end)
• Works with dual-rail saddles after removing the center connector and repositioning
• Not for curved or eccentric seatpost designs
• Includes mounting tools and hardware for most installations

How does the cushion material perform on longer rides?

The seat uses high-resilience latex core and a memory-like top layer covered in dense PU to balance pressure relief with shape recovery. The materials resist ordinary dirt and light moisture while offering a softer sit that reduces hotspots during extended rides.

• High-elastic latex interior for rebound and support
• High-density PU surface for wear and water resistance
• Oversized dimensions for broader weight distribution (11×8.66 in)
• Backrest pad sized for lumbar contact (7.48×8.66 in)

How easy is the installation and maintenance?

Installation is straightforward when your bike has a compatible straight seatpost: secure the carbon-steel connector, attach the cushion assembly, and tighten supplied screws. The product ships with the necessary fasteners and a simple guide; afterward, check all fastenings periodically for safety.

• Step-by-step mounting using included tools
• Check and tighten screws after initial rides
• Clean the PU cover with a damp cloth; avoid soaking the cushion
• Weight: about 4.17 lb for a stable feel on many bike types

Which bicycles and riders will benefit most?

This backrest suits tricycles, commuter bikes, electric bikes, exercise bikes, mountain and road bikes that use a straight seatpost and standard rail set-up. Riders seeking extra lumbar support, reduced sit-bone pressure, or a more upright riding posture will notice the biggest comfort gains.

• Great for commuters and recreational riders who sit upright
• Useful for riders recovering from saddle discomfort or stiffness
• Compatible with many e-bikes and exercise bikes for longer sessions
• Not intended for aggressive racing positions or highly technical MTB use

Who is this for: The THALOUS Oversized Memory Foam Bike Seat Backrest is aimed at cyclists who want a simple retrofit to improve daily riding comfort without replacing their saddle. If your bike has a straight seatpost with the common 22 mm narrow end and you favor an upright position, this backrest offers a durable, waterproof-covered cushion, steel connector hardware, and a user-friendly install. For curved seatposts or bespoke saddle systems, check compatibility before purchasing.