Coming Soon.

It is not a speaker.

We participated in Chicago Bike Swap

We participated in the exbition that held by a local shop and a private person in the suburbs of Chicago.

The site is not so large as a gymnasium.
GROWTAC alone was from Japan.
The event is very local.
However, its attraction is coming to genaral user's attention.

In below freezing point Chicago where is in season of the indoor practice, especially our products were taken interest in.

The general cyclists tried our products more than a big events as Eurobike, Interbike.

Specially, The fully-equipped Q1.1 had a good retation.

We spent precious time for interchanging an idea to the cyclists in general at the local exhibition like this.


Through axle trying!

At present, We test a demanding GT-Roller Flex3 that corresponds to Through axle hub for realization.

The looks is so rough for prototype.

It roars, so the bike in movie is cylcocross.

But in reality it is silent.

The feeling using block tire on Flex3 is comfortable unexpectedly.

We advise that you use an only for rollers, in fat manufacturer does not recommnend.




The beginner on Q1.1

The report on CYCLE MODE 2016

And then our booth for testing GT-Roller was in full swing at CYCLE MODE that is the biggest exhibition for bicycle in Japan last month.

Thank you for standing in line for a long stretch of time.

Only a month left twenty -sixteen, GROWTAC first exhibited our products at EURO BIKE and second at INTER BIKE.

This year was a challenging year for expanding overseas to us, and we work hard domestically as well.

We develop a new product for the next season.
Thank you.

Start to support Olympian!

Our GT-Roller Flex3 is very very slowly going for overseas.

We are about to start to support top athlete in Ukraine.

We are happy to might making her performance of Ms.Yuliya who participated in the Olympics up.

Good luck! Ms.Yuliya!


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We are going well for two days running.

The electric option of Q1.1 is also very popular at Interbike!

GROWTAC surprised you by world's first function.

We do develop a product to meet your expectation!!

Zwift, Kinomap,Tacx and the others commented that your product is cool 😀

We will work hard tomorrow too!




Many  people had a test ride at first day.
The voice of "the best! Great!" reached our ears.
Thanks for receiving high rating in United States!

It begins Interbike.


Inter-bike 2016 will begin from tomorrow.
The size of this year's booth has become the last year of the double.
Location is also near the entrance, it is also close to LOOK and Garmin booth.
I will do my best to get to see a lot of people!



GROWTAC attend on INTERBIKE2016 that will be held in Las Vegas!!


From September 21 to 23 days, our company will display in Interbike.

We are looking forward to a lot of people can experience our innovative trainers.

We will be more than happy to see you at our exhibiting booth :-

  Booth No. 11126  Kyosei Co Ltd in JAPAN Area.


GT-Roller Flex3


The pioneer of fork-mount home trainer.
Our home trainer gives you a feeling like riding outside by making aninstability on purpose.
So you can train practically,keeping your balance.
And our home trainer is quiet in the world highest level.

GT-Roller Q1.1


World's first ! Four rollers!
Four rollers assure you of a wonderful stability in comparison with a traditional three rollers.
Raising a front unit reproduces a uphill faithfully.
Using a load-adjusting function makes possible a wide range of trainings.

Q1.1 OptionUnit

The elevator of front is only for GT-Roller Q1.1.
It reproduces up to a road with an inclination of about 10 degrees(dividedinto eleven levels) by the wireless remote-control only for GT-Roller Q1.1.
The electric power supplying units only for GT-Roller Q1.1.
It has a variety of function and supplies various trainings for you.