Skip to content
  • BRAND LIST
  • ALL PRODUCTS
  • OUTLET

Need help?

otoiawase@circles-jp.com

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • YouTube
  • BIKES
  • All Bikes, Frames, Forks
  • Complete Bikes
  • Framesets
  • Kids' Bikes
  • Forks
  • Frame Decals & Head Badges
  • Bike Trailers
  • PARTS
  • ALL BIKE PARTS
  • ACCESSORY
  • ALL BIKE ACCESSORIES
  • BAG
  • ALL BAGS
  • Helmets
  • ALL HELMETS
  • Road & Gravel Helmets
  • MTB Helmets
  • Urban Helmets
  • Kids' Helmets
  • WEAR
  • ALL APPAREL
  • Socks
  • Eyewear
  • Belts
  • Bandanas, Towels & Scarves
  • OUTDOOR
  • ALL OUTDOOR EQUIPMENT
  • Tents & Shelters
  • Camp Furniture
  • Stoves & Cookware
  • Cutlery
  • Outdoor Lights
  • Dry Bags & Stuff Sacks
  • Outdoor Accessories
  • Emergency Kits
  • Recreation
  • LIFESTYLE
  • ALL CULTURE
  • Camera Accessories
  • Coffee & Kitchen
  • Books, DVDs, Posters & Culture
  • Stickers & Patches
  • Key Rings
  • Skin Care
  • INFO
  • About Circles
  • What Are Circles Points?
  • Bike Maintenance Guide
  • Inquiries
  • Headsets
  • Headset
  • Stem Cap
  • Headset Spacers
  • Headset Small Parts
  • Wheelsets
  • Stock Wheels
  • Custom Wheels
  • Wheel Parts
  • Rim
  • Hubs
  • Spokes & Nipples
  • Hub Small Parts
  • Quick Release, Thru-Axle & Hub Nuts
  • Tires, Tubes & Valve Caps
  • Tires
  • Tubes
  • Valve Caps & Extenders
  • Rim Tape, Tubeless Supplies & Rim Cement
  • Handlebars, Stems, Grips & Bar Tape
  • Drop Handlebars
  • Flat Handlebars
  • Stems
  • Grips
  • Bar Tape
  • Handlebar Accessories
  • Saddles, Seatposts & Seat Clamps
  • Saddles
  • Seatposts & Dropper Posts
  • Seat Clamps
  • Drivetrain
  • Cranksets
  • Chainring
  • Bottom Brackets
  • Chains
  • Front Derailleurs
  • Rear Derailleurs & Tensioners
  • Freewheel, Cog, Lockring
  • Brake Levers, Shifters, Brakes & Cables
  • Brake Levers
  • Shifters
  • Brake
  • Disc Rotor
  • Brake Shoes, Disc Pads
  • Cables
  • Pedals, Parts & Accessories
  • Flat Pedals
  • Clipless Pedals
  • Clips, Straps
  • Cleats
  • Pedal Accessories & Parts
  • Bottles & Bottle Cages
  • Bottles
  • Bottle Cages
  • Cargo Cages
  • Cage Mounts
  • Lights, Reflectors
  • Lights
  • Reflectors
  • Light Accessories
  • Locks & Bells
  • Locks
  • Bells
  • Bike Racks & Baskets
  • Racks & Carriers
  • Rack Small Parts
  • Baskets
  • Rack / Basket Accessories
  • Fenders & Mudguards
  • Fenders
  • Fender Parts & Accessories
  • Clip-On Fenders
  • Pumps & Inflators
  • Floor Pumps
  • Mini Pumps
  • Pump Parts & Accessories
  • Bike Stands
  • Kickstands
  • Display Stands
  • Cycling Devices
  • Smartphone Mounts
  • Cycling Computers
  • Tools & Chemicals
  • Tools
  • Chemicals
  • Stickers & Decals
  • Stickers & Patches
  • Decals & Head Badges
  • Bike Bags
  • Basket Bags
  • Pannier Bags
  • Handlebar & Front Bags
  • Saddle Bags
  • Frame Bags
  • Rinko Bag
  • Other Bags
  • Bags
  • Messenger Bags
  • Backpacks
  • Waist Bags
  • Sacoches & Shoulder Bags
  • Tote & Shopping Bags
  • Travel Bags
  • Wallets & Pouches
  • Bag Accessories
  • Bicycle Apparel
  • Cycling Jackets & Vests
  • Cycling Jerseys
  • Bib Shorts, Shorts, Tights
  • Base Layers
  • Gloves
  • Cycling Caps
  • Warmers & Arm Covers
  • Outdoor & Casual Wear
  • Jackets & Vests
  • Sweatshirts, Fleece
  • Shirts
  • T-Shirts
  • Caps & Hats
  • Pants
  • Shorts, Knickers & Skirts
  • Ankle Bands
  • Shoes
  • Sandals
  • Road Shoes
  • MTB Shoes
  • Running Shoes
  • Trekking Shoes
  • Daily Shoes
  • Shoe Care
  • FAQ
  • About SimWorks by NITTO
  • About SimWorks by HONJO
  • About SimWorks by panaracer
  • About Chris King
  • About microSHIFT
  • About Selle Anatomica
  • About Seven Cycles
  • About Velocity
Circles｜サークルズ Circles｜サークルズ
Language
Country/region
Login / Signup
My account
0
Cart

Your cart is empty

Shop our products
  • BRAND LIST
  • ALL PRODUCTS
  • BIKES
    • All Bikes, Frames, Forks
    • Complete Bikes
    • Framesets
    • Kids' Bikes
    • Forks
    • Frame Decals & Head Badges
    • Bike Trailers
  • PARTS
    • ALL BIKE PARTS
    • Headsets
      • Headset
      • Stem Cap
      • Headset Spacers
      • Headset Small Parts
    • Wheelsets
      • Stock Wheels
      • Custom Wheels
    • Wheel Parts
      • Rim
      • Hubs
      • Spokes & Nipples
      • Hub Small Parts
      • Quick Release, Thru-Axle & Hub Nuts
    • Tires, Tubes & Valve Caps
      • Tires
      • Tubes
      • Valve Caps & Extenders
      • Rim Tape, Tubeless Supplies & Rim Cement
    • Handlebars, Stems, Grips & Bar Tape
      • Drop Handlebars
      • Flat Handlebars
      • Stems
      • Grips
      • Bar Tape
      • Handlebar Accessories
    • Saddles, Seatposts & Seat Clamps
      • Saddles
      • Seatposts & Dropper Posts
      • Seat Clamps
    • Drivetrain
      • Cranksets
      • Chainring
      • Bottom Brackets
      • Chains
      • Front Derailleurs
      • Rear Derailleurs & Tensioners
      • Freewheel, Cog, Lockring
    • Brake Levers, Shifters, Brakes & Cables
      • Brake Levers
      • Shifters
      • Brake
      • Disc Rotor
      • Brake Shoes, Disc Pads
      • Cables
    • Pedals, Parts & Accessories
      • Flat Pedals
      • Clipless Pedals
      • Clips, Straps
      • Cleats
      • Pedal Accessories & Parts
  • ACCESSORY
    • ALL BIKE ACCESSORIES
    • Bottles & Bottle Cages
      • Bottles
      • Bottle Cages
      • Cargo Cages
      • Cage Mounts
    • Lights, Reflectors
      • Lights
      • Reflectors
      • Light Accessories
    • Locks & Bells
      • Locks
      • Bells
    • Bike Racks & Baskets
      • Racks & Carriers
      • Rack Small Parts
      • Baskets
      • Rack / Basket Accessories
    • Fenders & Mudguards
      • Fenders
      • Fender Parts & Accessories
      • Clip-On Fenders
    • Pumps & Inflators
      • Floor Pumps
      • Mini Pumps
      • Pump Parts & Accessories
    • Bike Stands
      • Kickstands
      • Display Stands
    • Cycling Devices
      • Smartphone Mounts
      • Cycling Computers
    • Tools & Chemicals
      • Tools
      • Chemicals
    • Stickers & Decals
      • Stickers & Patches
      • Decals & Head Badges
  • BAG
    • ALL BAGS
    • Bike Bags
      • Basket Bags
      • Pannier Bags
      • Handlebar & Front Bags
      • Saddle Bags
      • Frame Bags
      • Rinko Bag
      • Other Bags
    • Bags
      • Messenger Bags
      • Backpacks
      • Waist Bags
      • Sacoches & Shoulder Bags
      • Tote & Shopping Bags
      • Travel Bags
      • Wallets & Pouches
      • Bag Accessories
  • Helmets
    • ALL HELMETS
    • Road & Gravel Helmets
    • MTB Helmets
    • Urban Helmets
    • Kids' Helmets
  • WEAR
    • ALL APPAREL
    • Bicycle Apparel
      • Cycling Jackets & Vests
      • Cycling Jerseys
      • Bib Shorts, Shorts, Tights
      • Base Layers
      • Gloves
      • Cycling Caps
      • Warmers & Arm Covers
    • Outdoor & Casual Wear
      • Jackets & Vests
      • Sweatshirts, Fleece
      • Shirts
      • T-Shirts
      • Caps & Hats
      • Pants
      • Shorts, Knickers & Skirts
      • Ankle Bands
    • Shoes
      • Sandals
      • Road Shoes
      • MTB Shoes
      • Running Shoes
      • Trekking Shoes
      • Daily Shoes
      • Shoe Care
    • Socks
    • Eyewear
    • Belts
    • Bandanas, Towels & Scarves
  • OUTDOOR
    • ALL OUTDOOR EQUIPMENT
    • Tents & Shelters
    • Camp Furniture
    • Stoves & Cookware
    • Cutlery
    • Outdoor Lights
    • Dry Bags & Stuff Sacks
    • Outdoor Accessories
    • Emergency Kits
    • Recreation
  • LIFESTYLE
    • ALL CULTURE
    • Camera Accessories
    • Coffee & Kitchen
    • Books, DVDs, Posters & Culture
    • Stickers & Patches
    • Key Rings
    • Skin Care
  • OUTLET
  • INFO
    • About Circles
    • What Are Circles Points?
    • Bike Maintenance Guide
    • FAQ
      • About SimWorks by NITTO
      • About SimWorks by HONJO
      • About SimWorks by panaracer
      • About Chris King
      • About microSHIFT
      • About Selle Anatomica
      • About Seven Cycles
      • About Velocity
    • Inquiries

プロダクトレビュー

ヘルメットの義務化について

ヘルメットの義務化について

category:REVIEW武井良祐Apr 01, 2023
ヘルメットと頭のかたちの相性を紐解いてみる

ヘルメットと頭のかたちの相性を紐解いてみる

asianfit柳瀬公識Jan 30, 2021

Join Us

A short sentence describing what someone will receive by subscribing

100% free, Unsubscribe any time!

Follow us

Access Denied
IMPORTANT! If you’re a store owner, please make sure you have Customer accounts enabled in your Store Admin, as you have customer based locks set up with EasyLockdown app. Enable Customer Accounts
  • BRAND LIST
  • ALL PRODUCTS
  • BIKES
  • PARTS
  • ACCESSORY
  • BAG
  • Helmets
  • WEAR
  • OUTDOOR
  • LIFESTYLE
  • OUTLET
  • INFO
  • SEARCH
  • Terms of Service
  • Legal Notice (Specified Commercial Transactions Act)
  • Privacy Policy
  • Circles Points Terms of Use
  • Shipping Information
  • Returns & Exchanges
  • Shopping guides
  • Circles
  • CULTURE CLUB
  • SimWorks
  • SimWorks USA
  • CWD
  • Kyutai Paint
  • EARLYBIRDS BREAKFAST
  • PINE FIELDS MARKET
  • CERCHI
Language
Language
Country/region
Country/region

© 2026 Circles｜サークルズ
Powered by Shopify

Follow Us

We Accept

American Express Apple Pay Google Pay JCB Mastercard PayPal Shop Pay Visa

© 2026 Circles｜サークルズ
Powered by Shopify

  • Opens in a new window.