10万円以下でSORA搭載？在庫限りで狙うべき入門ロード「STRATTOS S3」

SORA-equipped for under 100,000 yen? The "STRATTOS S3" is an entry-level road bike you should aim for while supplies last.

April 19, 2026

Eirin Imadegawa Kyodai-mae Branch Annex

"There are fewer and fewer decent road bikes available for under 100,000 yen."

Given this situation, getting one at this price is quite rare. The POLYGON "STRATTOS S3" is an entry-level road bike with Shimano SORA that performs well, and it's currently on a significant markdown while supplies last.

Whether it's your first bike or you just want to get into road cycling casually, this bike perfectly hits that "just right" spot.

This article provides a brief overview of the STRATTOS S3!
▼ If you're interested in more details, check this out too!
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POLYGON STRATTOS S3

Road bike under 100,000 yen, affordable and recommended for beginners

【Manufacturer's suggested retail price】￥135,300 (tax included) ⇒ SALE! ￥87,945 (tax included) *While supplies last
【Colors (2 available)】Orange, Charcoal
【Sizes (approximate height)】S (162-170cm), M (168-176cm), L (174-181cm)

▼Check availability for colors and sizes here

"You'll regret it if you don't know" - The true identity of POLYGON

Many of you might be thinking, "I've never heard of POLYGON..."

Actually, this brand is the in-house brand of "Insera Sena," a massive factory that has produced OEM for famous manufacturers worldwide.

With an annual production capacity of over 1 million units and a robust quality control system, it's a bike truly made by "manufacturing pros."

Beginner-friendly design with emphasis on stability

The STRATTOS S3 features a low center of gravity and a long wheelbase, making stability its key characteristic.

Its gentle handling response means that even first-time road bike riders won't feel intimidated.

With carbon fork for vibration absorption, it offers a stress-free riding experience from city commuting to cycling tours.

"Full SORA" at this price point is honestly quite excellent.

The main components are consistently SHIMANO SORA (2x9 speed).

While many bikes in this price range often downgrade the crankset, having a complete set is a significant advantage.

It's recommended to enjoy it as is for now, and then consider upgrading the wheels or brakes as you get more comfortable.