2025年 July

10 Best 自転車パーツ in 日本

Last Updated - 20/07/2025

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Best Choice
01

ROCKBROS

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RockBros Top Tube Bag, Bicycle, Easy Mount, Frame Bag, Trinket Case, Does Not Hit Your Knees, Long Wallet, Smartphone Case, Storage Bag, Cycling
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Sizes: S: Approx. 8.5 x 2.2 x 3.3 inches (21.5 x 5.5 x 8.5 cm); L: Approx. 9.3 x 3.3 x 4.1 inches (23.5 x 8.5 x 10.5 cm); Suitable for outdoor activities such as commuting to work or school, cycling, and travel.Makes a perfect gift!
Lightweight and Spacious: Comes in a compact size with ample capacity.Lightweight and easy to carry, it adds no extra pressure and can hold your keys, smartphone, credit cards, wallet, coins, flashlight, etc
High Functionality: Since it's made of high quality PU leather, it has strong water resistance and a solid feel. It resists breaking and warping.It will protect your contents
Good Stability: It can be affixed to both the front and the frame, making it more stable.Designed to fit the frame so your bag won't hit your knees while cycling
Easy to Attach: The bag is secured with a Velcro strap and can easily be transferred from one bicycle to another.The velcro strap attachment fits most bikes

￥2,825
Best Value
02

ROCKBROS

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ROCKBROS Bicycle Mud Flap, Road Bike, Fender, 700c Mudguard, Angle Adjustment, Mud Flap, Front and Rear Lightweight, Durable, Easy Installation, Flexible, PP Material, Black
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

【Stylish】Streamlined design fits the shape of the wheel, reducing wind resistance. At first glance, it will not look like there is a mud flap on the front and back. The mud flaps are recommended to cover speed and visual issues, and if you are riding a comfortable road bike in rainy days
【Easy to Install】Fender is universal in front and back, easy to install in front and back. The single fender features two quick brackets, a non-slip cushion and a hex wrench, and the bracket ties the belt to secure it to your bike. (5 cable ties are included, one of them is extra. Attach it to the front fork or seat stay, and the mud flap can be adjusted to the height and angle depending on the bike for convenient installation. Also available in front and rear mud guard sets and are easy to install and remove for different weather situations
[Application] Color: Black. Weight: 180g Complete front and rear mud flaps for bikes. Suitable for road bike 700C If you ride every day for work or school, you can put it on a full defense "Full Fender Type" so you don't have to worry about your suit or uniform getting dirty even in sudden rain. If you're cycling for one day only, "Today never rain! In such cases, you may want to take off the mud guards and run in a light state. It is also convenient for you to install and remove the mud flaps
Super Pressure Resistant Material: Made of polycarbonate that is resistant to distortion, making it sturdy and highly flexible and durable. Safe, less likely to damage the fender and cause injury. Recommended for those who want to securely secure their safety and mud flaps
Essential for Driving in Mud or Rain: Equipped with a mud flap that prevents the discomfort of your buttocks from getting wet, so you can quickly speed it up. With safety in mind, you can enjoy cycling on rainy days. This mud guard is a must have item for those who want to ride on road bikes every day at work or school

￥2,388 ￥2,517
03

reiri

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reiri Bicycle Insect Rubber No Need Super Valve, English Type (4 Black), Instruction Manual Included, No Rubber Required Valve
9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Set of 4 (4 black caps) with full color instructions
No Insect Rubber Required: Because it does not use insect rubber, there is no need to worry about troublesome bug rubber replacements
Long life: The valve is easy to structure so it reduces rubber deterioration and increases its service life
Easy and Fast: Just insert and replace, so you can replace it easily and quicker than insect rubber
Easy Inflation: The seal inside the valve moves so you can easily inflate it without any force

￥550
04

サムコス

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Samcos Bicycle Handlebar Extension Bracket Aluminum Alloy Bicycle Holder Lightweight Extension Mount Accessory Holder Easy Installation
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

【Extension Bracket】This product is a bicycle extender, you can add extra storage space and add a variety of accessories (such as bicycle lights, headlights, speedometers, GPS or phone)
[Features] Lightweight and long lasting, this product weighs only 4.6 oz (136 g). Aluminum alloy clamp with reinforced construction and spacers of aluminum alloy material, provide useful space and looks stylish
Size: Extension bracket length: 7.9 inches (20 cm). Suitable for installation handle diameter:25mm to 32mm;Load capacity is 1000g bars (fits normal 22.2mm, 25.4mm, 31.8mm by adding or removing shims)
Package Contents: Extension bracket x 1. Hex wrench x 1
Easy to install: Installation is very easy with the included hex wrench. You can easily change the position or angle

￥745
05

Worpurrt

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Bicycle Smartphone Holder, 2024 Upgraded Model, One-Handed Operation (Does Not Disturb the Camera), Bicycle Mobile Holder, Drop Prevention, Vibration Absorption, Strong Protection, Smartphone Holder,
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

🚲🚲【High Quality Material and High Precision Finish】ABS plastic body and EVA mat are durable. Anti-aging and UV resistance is superior to regular plastics, so you can leave it on your bike for a long time without removing it from your bike. Rotates 360 degrees and allows you to enjoy riding while using the Google Map of your smartphone
No disturbing camera: The smartphone holder only covers the lower half of your smartphone. The bicycle smartphone holder does not cover the camera or earphone jack of your phone. It will not interfere with your phone's camera at the same time while holding it firmly in You can enjoy shooting while driving
Improved Fixing Clamp: All screw accessories are included in the product itself, no additional accessories are included, so you can install them without any tools, but they can be installed faster than conventional models. Dramatically Improve Installation Convenience The holder is fixed by inserting. The pad on the bottom prevents your phone from falling out
INSTALLATION WITHOUT ADDITIONAL ACCESSORIES: This is an upgraded fixing clamp that requires no additional accessories, and can be tightened by hand. Please contact us if you have any questions during installation. We are looking forward to bring you a happy shopping experience
Compatible Models & Handlebars: Compatible with smartphones that are approximately 4.5-7 inches. Compatible with smartphone thickness up to 0.6 inch (15 mm), and the width is 2.4 - 3.5 inches (60 - 90 mm). Please make sure it fits your device before purchasing
(Simple and Easy to Use) When securing your smartphone, press the smartphone body to the button in the middle of the holder, and the arms on both sides are closed to secure the smartphone. To remove, press the lever on both sides of the bottom to open the arm and release. *When driving for long periods of time (long distances), it is necessary to check whether the smartphone is misaligned and put it back into place
(Impact Reduction Silicone, Protects Your Device) The interior of the holder is equipped with a mesh silicone pad that absorbs noise caused by impacts, and prevents scratches from friction between the device and the holder while driving. The handle mount comes with 2 anti-shake silicone so you can change the number of silicone pads to match the diameter of the handle. Compatible with handle diameter 0.6 - 1.6 inches (14 - 40 mm)

￥999
06

サムコス

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Samcos Bicycle Bike Bar End Plug Bar End Caps 1 Pair Aluminum Alloy Material Removable Accessories Anti-Slip Lightweight Durable Stability (Blue)
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Wide range of uses: Suitable for all road bikes, mountain bikes, fixed bikes, road bikes, mountain bikes, cross bikes, etc
Excellent Material: Made of high quality aluminum alloy and premium plastic, lightweight, corrosion resistant, sturdy and durable
Easy to install: Easy to install and remove. Bike bar end plugs are designed to tighten the screws so that you insert the plastic insert into the handlebar and insert the handlebar
(Product Specifications) Handlebar Outer Diameter: Approx. 0.9 - 0.9 inches (22 - 24 mm), Handlebar Inner Diameter: Approx. 0.7 - 0.8 inches (17.5 - 21.9 mm), Weight: Approx. 0.7 oz (20 g), Color: Blue
(Action) Easy to install on a bicycle, it has a non-slip effect, protecting the rod and reducing damage to the handle while wrestling

￥585
07

フォグリア(FOGLIA)
82% Off

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FOGLIA ALUMINUM VALVE CAP, Presta Type, 2 Pack, Red, LY-NC-FR(2PCS) Bicycle
8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Valve Cap for Presta Valve
Quantity: 2
Protect and dress up valve openings
Country of Origin: Taiwan
Color: Red

￥91 82% Off
08

AZ(エーゼット)

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AZ Bicycle Work Stand Foldable KF202
8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

The cutout of the receiver will roll up. In addition, if you do not cut out the receiver, the shape of the bottom will be chipped off. This also makes it easy to put on and take off
Suitable for hub width between 5.1 to 6.3 inches (13 to 16
Note: Please be aware of counterfeit products. This product includes an aget instruction manual on the bag
Note: For general quick release bikes. May not work with some models. Especially not for quick releases such as Campagero, MAVIC, FSA, Full Cram (FULCRUM). Please check the size in the picture
Note: Do not ride on a bicycle while wearing it

￥1,288 ￥1,431
09

SHEAWA

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SHEAWA Bicycle Tail Light, Automatic Lighting, Magnetic Power, Flashing, Safety Light, Rear Light, No Batteries Required, Lightweight, Convenient, High Visibility (Left Side)
8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

[180° Wide Angle Lighting] Equipped with 2 high brightness LED lights that can be illuminated at a 180° wide angle, and is highly visible from the sides to ensure night safety
Package Contents: 1 x Tail Light, 2 x Magnets
IPX4 Waterproof: It has IPX4 waterproof performance so you don't have to worry about sudden rain while driving. Compatible Size: Can be attached to backhawks from 0.5 to 0.9 inches (12 to 22 mm)
Automatic Flashing While Running: As the wheels spin while riding, the magnets attached to the spokes move closer and away from the tail light to achieve a flashing effect
(Automatic illumination with magnetics) Uses magnetic power generating technology, the tail light will automatically light up when you shake the magnet closer to the main canary mark part of the main unit, keeping it at a distance of about 0.1 - 0.2 inches (3 - 5 mm). No batteries needed, very convenient!

￥2,085
10

BTtime

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BTtime Bicycle Bar End Bar Inner Diameter 22.2mm Alloy Auxiliary Handlebar Anti-Tarnish Easy Installation Anti-deformation Light Heavy Duty Anti-Slip Bike Accessories Black for Road Bike Mountain Bike
8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

【Perfect Design】The bicycle assistant handlebar can help you control your bike better and can be used in a variety of positions. Exquisite workmanship, stylish appearance and easy to use. Practical tool
【High Quality】High quality aluminum alloy It has a good texture and texture, and is lightweight and durable, reducing the burden on your bicycle. It will not irritate or soften in the sun
[Product Details] Product Total Length: 4.3 inches (110 mm), Handle Length: 3.3 inches (85 mm), Applicable Diameter: 0.9 inches (22.2 mm), Weight: Approx. 5.7 oz (146 g) / 1 pair. Color: Black
[For resting and fatigue-relief] Ergonomic bicycle grip design improves riding comfort. Reduce fatigue by changing the riding position during long cycling
Easy Installation: Easy to install on bike handlebars without using tools. The bolt on the handle mounting part is forward so you can install it without worrying about interference with the shifter

￥920

10 Best 自転車パーツ in 日本

RockBros Top Tube Bag, Bicycle, Easy Mount, Frame Bag, Trinket Case, Does Not Hit Your Knees, Long Wallet, Smartphone Case, Storage Bag, Cycling

ROCKBROS Bicycle Mud Flap, Road Bike, Fender, 700c Mudguard, Angle Adjustment, Mud Flap, Front and Rear Lightweight, Durable, Easy Installation, Flexible, PP Material, Black

reiri Bicycle Insect Rubber No Need Super Valve, English Type (4 Black), Instruction Manual Included, No Rubber Required Valve

Samcos Bicycle Handlebar Extension Bracket Aluminum Alloy Bicycle Holder Lightweight Extension Mount Accessory Holder Easy Installation

Bicycle Smartphone Holder, 2024 Upgraded Model, One-Handed Operation (Does Not Disturb the Camera), Bicycle Mobile Holder, Drop Prevention, Vibration Absorption, Strong Protection, Smartphone Holder,

Samcos Bicycle Bike Bar End Plug Bar End Caps 1 Pair Aluminum Alloy Material Removable Accessories Anti-Slip Lightweight Durable Stability (Blue)

FOGLIA ALUMINUM VALVE CAP, Presta Type, 2 Pack, Red, LY-NC-FR(2PCS) Bicycle

AZ Bicycle Work Stand Foldable KF202

SHEAWA Bicycle Tail Light, Automatic Lighting, Magnetic Power, Flashing, Safety Light, Rear Light, No Batteries Required, Lightweight, Convenient, High Visibility (Left Side)

BTtime Bicycle Bar End Bar Inner Diameter 22.2mm Alloy Auxiliary Handlebar Anti-Tarnish Easy Installation Anti-deformation Light Heavy Duty Anti-Slip Bike Accessories Black for Road Bike Mountain Bike

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