April 19, 2026
Introducing Sig.Rando, the grumpy original chromoly touring bike that's been the companion of our staff member, Ikeda, who's owned over 40 bikes. We'll be covering its custom configuration, cargo capacity, and comfort during Audax rides, brought to you by Grumpy, a bicycle select shop in Hiroshima.
December 2, 2024
A new style of complete bike has been added to Grumpy's original bike, the Sig.Rando. It's called the "Old Mountain Bike Style."
This model fe...
March 5, 2024
I've been vaguely thinking about it for a while now: my dream commuter bike plan, built with Sig.rando.
Shimano offered to provide me with their ne...
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27.5 ,
650b ,
cues ,
grumpypaintshop ,
MTB ,
MTB / マウンテンバイク ,
Shimano ,
Sig.Rando ,
オールドMTB ,
カスタムペイント ,
グランピーペイント ,
コミューター ,
シグランドー ,
シマノ ,
スプラッシュペイント ,
街乗り
January 19, 2024
We have two special edition Sig.Rando bikes available.
Compared to the standard complete bike, this model features some different parts and is off...
January 9, 2024
Hello, this is Ikeda from grumpy. There are many ways to enjoy cycling, but my theme for 2024 is "exploration and adventure."
It's about focusing o...
November 21, 2023
Regarding the Grumpy original bike, the Sig.Rando, we are running low on M size frame sets.
The L size is already sold out, and the S size is also ...
September 10, 2023
We have added a titanium head badge option for our Grumpy original bikes, the Sig.Rando and KOGO.
While the standard brass head badges, featuring...
July 21, 2023
One Sig. Rando frameset in Yomogi color is available for immediate delivery.
The frame color is "Yomogi," the basic color of the GRX limited model...
May 21, 2023
To make space for new display bikes, we are offering the Sig.Rando complete bike display models at 10% off the regular price.
The Sig.Rando is a ro...
October 14, 2022
We re-evaluated what a complete bike needs for an enjoyable ride and reconfigured its parts.The Sig.Rando complete bike microSHIFT model features...
September 18, 2022
The standard colors for Grumpy's original Sig.Rando bike will be replaced with new colors from October 1st, and all will be "powder coated."
The ...
September 16, 2022
【Updates】
・Surly Midnightspecial RAW color special model - Sold out
・Sig.Rando RAW color special model, size M - Only 1 left
・Allcity Space Horse ...
Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device
![The Most Beautiful Bicycle Is the One You Ride — My Partner, Sig.Rando [Staff Bike Feature #02]](//ride.grumpy.jp/cdn/shop/articles/20260413-DSC_0216_455x300@2x.jpg?v=1776736727)
Introducing Sig.Rando, the grumpy original chromoly touring bike that's been the companion of our staff member, Ikeda, who's owned over 40 bikes. We'll be covering its custom configuration, cargo capacity, and comfort during Audax rides, brought to you by Grumpy, a bicycle select shop in Hiroshima.![[Old Mountain Bike Style] Sig.Rando complete bikes get a new lineup addition.](//ride.grumpy.jp/cdn/shop/articles/DSC07767_455x300@2x.jpg?v=1733114709)
A new style of complete bike has been added to Grumpy's original bike, the Sig.Rando. It's called the "Old Mountain Bike Style." This model fe...
I've been vaguely thinking about it for a while now: my dream commuter bike plan, built with Sig.rando. Shimano offered to provide me with their ne...
We have two special edition Sig.Rando bikes available. Compared to the standard complete bike, this model features some different parts and is off...![The 2024 theme is [Exploration & Adventure] – To places unknown! I've started preparing for gravel and dirt rides!](//ride.grumpy.jp/cdn/shop/articles/IMG_1833_455x300@2x.jpg?v=1704786005)
Hello, this is Ikeda from grumpy. There are many ways to enjoy cycling, but my theme for 2024 is "exploration and adventure." It's about focusing o...
Regarding the Grumpy original bike, the Sig.Rando, we are running low on M size frame sets. The L size is already sold out, and the S size is also ...![[Sig.Rando & KOGO] Titanium Original Head Badges Now Available!](//ride.grumpy.jp/cdn/shop/articles/DSC07386_455x300@2x.jpg?v=1694315968)
We have added a titanium head badge option for our Grumpy original bikes, the Sig.Rando and KOGO. While the standard brass head badges, featuring...
One Sig. Rando frameset in Yomogi color is available for immediate delivery. The frame color is "Yomogi," the basic color of the GRX limited model...
To make space for new display bikes, we are offering the Sig.Rando complete bike display models at 10% off the regular price. The Sig.Rando is a ro...
We re-evaluated what a complete bike needs for an enjoyable ride and reconfigured its parts.The Sig.Rando complete bike microSHIFT model features...
The standard colors for Grumpy's original Sig.Rando bike will be replaced with new colors from October 1st, and all will be "powder coated." The ...
【Updates】 ・Surly Midnightspecial RAW color special model - Sold out ・Sig.Rando RAW color special model, size M - Only 1 left ・Allcity Space Horse ...
![The Most Beautiful Bicycle Is the One You Ride — My Partner, Sig.Rando [Staff Bike Feature #02]](http://ride.grumpy.jp/cdn/shop/articles/20260413-DSC_0216_455x300@2x.jpg?v=1776736727)
![[Old Mountain Bike Style] Sig.Rando complete bikes get a new lineup addition.](http://ride.grumpy.jp/cdn/shop/articles/DSC07767_455x300@2x.jpg?v=1733114709)
![The 2024 theme is [Exploration & Adventure] – To places unknown! I've started preparing for gravel and dirt rides!](http://ride.grumpy.jp/cdn/shop/articles/IMG_1833_455x300@2x.jpg?v=1704786005)
![[Sig.Rando & KOGO] Titanium Original Head Badges Now Available!](http://ride.grumpy.jp/cdn/shop/articles/DSC07386_455x300@2x.jpg?v=1694315968)
