Blog
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Cycled to Etajima's Mitsutaka-yama Battery Ruins in search of a photogenic spot!
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I'm Murakami, a staff member who felt out of shape after a 200km ride at the end of the year. So, I went for a bike ride to "Takayama Battery Rem... -
It's time to start exercising! Introducing the KONA ROVE ST, a bike that can do it all.
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Have you been exercising lately? With remote work, overeating during the New Year's holiday, and staying indoors due to the cold, many of us feel... -
I assembled the Chapter2 gravel road bike "AO."
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My passion for cycling has been reignited since I got a carbon gravel road bike. I'm Murakami, a staff member here. The bike I'm riding is a Chap... -
[650B and 700c] Enjoy MAVIC wheel customization with two sizes
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![[650B and 700c] Enjoy MAVIC wheel customization with two sizes](//ride.grumpy.jp/cdn/shop/articles/DSC01422_455x300@2x.jpg?v=1664869223)
Those using 650B wheels should try 700c, and those using 700c should try 650B. By swapping between the two wheel sizes, you can enjoy a completely... -
We have started carrying the new brand "BOMBTRACK."
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Bombtrack is a bicycle brand based in Cologne, Germany. Their models are characterized by their extreme durability, based on extraordinary experien... -
We are selling our Sig.Rando display models at a special price.
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With the change of the Sig.Rando frame's basic color from October 1st, we are selling our store display model in autumn leaf red. The complete bik... -
For those seeking a beautiful and easy-to-use floor pump
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When you buy a bicycle, the first items you should purchase are lights, a lock, and a floor pump (air pump). Have you bought them yet?
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For those considering MAVIC wheels
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We will explain the general types of Mavic wheels, and in the latter half, we will focus on our popular all-road wheels in both 700C and 650B sizes. -
Introduction to Essential Gear and Items for Your First Gravel Bike Purchase
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A must-read for anyone who already owns a gravel bike! Gravel bikes are characterized by their bulky tires. Here, we introduce recommended ai... -
We started Sig.Rando with the hope that our products would blend into your daily life and be used for a long time to come.
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Sig.Rando was born as Grumpy's original bicycle. We are grateful to so many customers for their support, which has allowed us to continue selling ... -
Update 10/23: Grumpy presents gravel road bikes and touring bikes available for immediate purchase.
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Thinking of starting cycling to get more exercise or for a change of pace? Then a gravel road bike is for you! It's a versatile model that's fast ...
![[650B and 700c] Enjoy MAVIC wheel customization with two sizes](http://ride.grumpy.jp/cdn/shop/articles/DSC01422_455x300@2x.jpg?v=1664869223)
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