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Things You Should Know If You Ride an MTB! Reasons to Choose Short Cranks for Your MTB
Recently, short cranks have become a hot topic in road biking. This is due to their ability to r...
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Perfect for your gravel debut! Customization campaign to address the weaknesses of the Cannondale Topstone Carbon 4
This is an announcement for a campaign to support your gravel bike debut.
The gravel bike Grumpy...
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[Old Mountain Bike Style] Sig.Rando complete bikes get a new lineup addition.
A new style of complete bike has been added to Grumpy's original bike, the Sig.Rando. It's ca...
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SANTACRUZ up to 35% off! The SANTACRUZ FACTORY SALE begins. Until December 3rd
The Santa Cruz Factory Sale has begun!
Previous models are up to 35% off! This is your chance to ...
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Rocky Mountain MTBs and Gravel Bikes on Special! [Extended]
We have exciting news for those who want to get into mountain biking or gravel biking!
Mountain ...
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The final shipment of Unauthorized 33rpm has arrived.
The Unauthorized 33rpm, designed and engineered in Japan to suit Japanese trail conditions and cl...
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A hardtail mountain bike that’s fun for beginners and veterans alike. Cannondale Habit HT
I got myself a hardtail MTB.
A few years ago, I got an eMTB and rediscovered the joy of pedaling...
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New mountain biking jerseys and backpacks have arrived from Patagonia.
Patagonia has released new long-sleeve jerseys and backpacks for mountain biking.
Men's Long-Slee...
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Versatile flat pedals for all-around riding: Crankbrothers Stamp 7
Hello, this is Ikeda from grumpy.
I believe the charm of flat pedals is their ease of use, as yo...
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Introducing a customized KONA SUTRA LTD.
Kona's Sutra LTD is an adventure bike that can ride through any terrain.
Here are some customized...
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I built a special commuter bike using Shimano CUES and Sig.rando.
I've been vaguely thinking about it for a while now: my dream commuter bike plan, built with Sig....
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I went to a Santa Cruz user-exclusive event to see my favorite idol/artist.
The other day, I participated in the "Ride Session with Santa Cruz Syndicate In Forest Bike" t...
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![[Old Mountain Bike Style] Sig.Rando complete bikes get a new lineup addition.](//www.grumpy.jp/cdn/shop/articles/DSC07767_345x345@2x.jpg?v=1733114709)
![Rocky Mountain MTBs and Gravel Bikes on Special! [Extended]](//www.grumpy.jp/cdn/shop/articles/DSC04491_345x345@2x.jpg?v=1725935502)
![[Old Mountain Bike Style] Sig.Rando complete bikes get a new lineup addition.](http://www.grumpy.jp/cdn/shop/articles/DSC07767_345x345@2x.jpg?v=1733114709)
![Rocky Mountain MTBs and Gravel Bikes on Special! [Extended]](http://www.grumpy.jp/cdn/shop/articles/DSC04491_345x345@2x.jpg?v=1725935502)
