Skip to main content

Bicycle Handlebar Adapter Spacer 25.4 to 31.8 mm - Stem Adapter Bicycle Spacer for Bicycle Handlebar with Diameter 25.4 mm on MTB Handlebar 31.8 mm, Aluminium Bicycle Handlebar Shim Spacer for Road

Brand: Kalexion
  • Compatible dimensions for conversion of handlebars and stem. This set contains two handlebar adapters for connecting diameter 25.4 mm bicycle handlebars with a stem diameter 31.8 mm. The spacer bicycle is ideal for conversion or replacement on MTB, road bike or trekking bike. The bicycle handlebar shim spacer 25.4 to 31.8 mm fits in many common systems.
  • Sturdy design made of anodised aluminium alloy. The spacer is made of robust, anodised aluminium alloy, which is lightweight, rust-proof and dimensionally stable. This keeps the connection between the stem 25.4 and MTB handlebars 31.8 safe - even under regular use and changing weather conditions.
  • Surface structure for additional friction. The inner surface of the stem adapter is slightly textured to avoid slipping and increase friction between bicycle handlebars and stem. This ensures a secure hold of the bicycle handlebars – especially on sporty rides or on uneven tracks.
  • Easy to install with included tools. Thanks to the enclosed wrench, the handlebar adapter can be mounted quickly and precisely. The bicycle handlebar shim spacer 25.4 to 31.8 mm is suitable for both DIY enthusiasts and experienced screwdrivers - without additional tools required.
  • Versatile use in everyday life and leisure area. Whether for mountain bike, road bike or city bike – this spacer bicycle supports the installation of a thinner handlebar on a larger stem. This means that older components can also be reused and new combinations can be implemented without any problems.
Brand: Kalexion
Size: 25.4 auf 31.8mm
Color: Black
Manufacturer: Kalexion
Part Number: GPZGWQ4
Material Type: Aluminium
Isin: ITPR0XG6IH4E

$16.24

  • Free shipping in US
  • Shipping: $14.5 Extended Delivery (Ships from overseas warehouse, 10-15 Business Days)
  • Arrives:

  • Free 30-Day returns

In Stock

Sold by , Fulfilled by IBSPOT
Ships from USA

IBspot Buyer Protection

Shop confidently on IBspot, receive your item as described or your money back for eligible orders. Learn Program Terms

supported payment methods:Visa, Mastercard, Discover, Amex, Apple Pay, Google Pay

GUARANTEED SAFE CHECKOUT

More seller options

Starting from

Compare all sellers
  • MONEY BACK GUARANTEE

    30 days money back guarantee, no additional fee charged.

  • EXCELLENT SUPPORT

    We provide 24/7 online customer support via email.

  • Fast Shipping

    One week domestic shipping. Global delivery to the US in 2 weeks.

scroll to top arrow
Bicycle Handlebar Adapter Spacer 25.4 to 31.8 mm - Stem Adapter Bicycle Spacer for Bicycle Handlebar with Diameter 25.4 mm on MTB Handlebar 31.8 mm, Aluminium Bicycle Handlebar Shim Spacer for Road

Bicycle Handlebar Adapter Spacer 25.4 to 31.8 mm - Stem Adapter Bicycle Space...

$16.24

Bicycle handlebar adapter spacer 25.4 to 31.8 mm - practical solution for connecting handlebars and stem during conversions or retrofits.

The bicycle handlebar shim spacer 25.4 to 31.8 mm offers a sophisticated way to integrate a handlebar with a diameter of 25.4 mm into a stem with a diameter of 31.8 mm. Especially when converting older bikes or using components with different diameters, this handlebar adapter is a reliable addition to road bikes, mountain bikes or trekking bikes. The two adapters included in the set allow you to easily compensate for the size differences between bicycle handlebar and stem - without having to buy expensive new parts.

Made of anodised aluminium alloy, the spacer bicycle impresses with its stable structure, durability and corrosion resistance. The material is lightweight, dimensionally stable and resistant to moisture, dust or dirt - ideal for everyday use in road traffic or on sporty tours. Thanks to the CNC-machined surface, the stem adapter fits perfectly into the existing handlebar system and ensures a secure connection, even under prolonged use.

Another functional feature is the slightly structured inner surface of the adapter sleeve. This provides additional friction between bicycle handlebars and stem 25.4 mm, which prevents the components from slipping and noticeably improves grip. This feature contributes to increased driving stability, especially when riding off-road or during dynamic movements, as typical of the MTB handlebar 31.8.

Installation is straightforward: a matching wrench is included with which the adapter sleeves can be mounted directly. Thus, the bicycle handlebar shim spacer 25.4 to 31.8 mm is also suitable for users who want to adjust their components independently. Whether as a small conversion at home or as a quick repair solution on the go – with this spacer bike, the handlebar unit can be flexibly adapted to different requirements.

Thanks to the universal dimensions, the handlebar adapter is compatible with numerous bicycles. Whether city bike with narrow handlebars, sporty mountain bike with larger stem or road bike with modern construction - the stem adapter opens up new combination possibilities for existing components. Especially for hobbyists, workshops or cycling enthusiasts, this bicycle handlebar spacer is a versatile accessory to efficiently connect and reuse existing components.

The clear technical orientation, the robust choice of materials and the easy handling make the bicycle handlebar shim spacer 25.4 to 31.8 mm a practical aid for the conversion of handlebar units. The included two pieces in the set also provide the necessary stability and allow symmetrical mounting - for more control, safety and flexibility when driving.

 

Processing Time

  • We process and ship orders Monday through Friday, excluding holidays.
  • Most orders are processed within 1–3 business days, depending on product availability.
  • Processing time does not include delivery time, which varies based on your location and the product’s shipping origin.

Shipping Coverage

We currently ship to addresses within the United States only.

Products may ship from:

  • Our U.S. warehouses, or
  • Our international fulfillment centers (including Korea, Japan, China, Australia, Mexico, Canada, the United Kingdom, and the EU).

Each product page clearly displays the “Ships From” location before checkout.


Shipping Methods & Estimated Delivery

 

Shipping Method Estimated Delivery Cost
Free Shipping (US) 5–10 business days Free, available on eligible items
Standard Shipping (US to US by Item) 5–10 business days $6.50 for the first item, $2.00 each additional
Standard Shipping (From US Warehouse by Weight) 3–7 business days Starts at $6.50, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb.
Extended Delivery (Ships from Overseas Warehouse) 10–20 business days $14.50 for the first item, $2.00 each additional

Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.

Free Shipping

We offer free standard shipping on select products or during promotional periods. Availability of free shipping will be displayed on the product page and at checkout. 


Carriers

We primarily use USPS and UPS for U.S. deliveries. Items shipped from international warehouses may be handled by partner carriers depending on the country of origin.


Import Duties & Taxes

All import duties and taxes for goods imported into the United States are included in the product price. There are no hidden fees or additional charges at checkout.


Tracking & Notifications

Every order is fully trackable. You will receive a tracking number via email once your order ships. If your order ships in multiple packages, each package will have its own tracking number. If you don’t receive a shipping confirmation immediately, your order is still being processed and will arrive within the estimated timeframe shown at checkout.

You can track your shipment anytime using the Track Your Order page on our website.


Order Changes & Cancellations

If you need to modify or cancel an order, please contact our customer support team as soon as possible. Orders can only be canceled before they ship. Once shipped, cancellations are not possible, but you may request a return after the item is delivered.

Contact: support@ibspot.com


Item Not Received

If your tracking number shows “Delivered” but you haven’t received your package:

  1. Check with your local USPS or UPS office.
  2. Confirm that the shipping address provided was correct.
  3. If the issue remains unresolved, contact support@ibspot.com for assistance.

Damaged or Lost Parcels

If your package arrives damaged or fails to arrive, please contact us immediately. For deliveries to P.O. boxes, ibspot is not responsible for damage caused by weather, temperature, or theft.


Customer Support

For any questions about shipping, tracking, or delivery, our customer support team is here to help.

Email: support@ibspot.com

We’re always happy to help.

Please read our policy carefully before making a purchase.
We aim to ensure every customer has a smooth and transparent experience with ibspot.com.


Order Cancellation Policy

Customers may request to cancel an order before it has been shipped.
Once the package has been shipped, cancellations are no longer possible; however, you may still request a return after receiving your order.

How to Request a Cancellation

You can contact us through:

Please submit your cancellation request as soon as possible after placing the order to allow us to process it before shipment.


Return Policy

We accept returns for most items within 30 days of delivery for a full refund.

To be eligible for a return:

  • The item must be unused, in the same condition as received, and in its original packaging.
  • A tracking number must be provided to confirm the return shipment.

Non-Returnable Items

Certain products cannot be returned, including:

  • Perishable goods (for example, food, flowers, newspapers, magazines)
  • Intimate or sanitary goods
  • Hazardous materials or flammable liquids/gases
  • Gift cards
  • Downloadable software
  • Some health and personal care items

Partial Refunds (If Applicable)

Partial refunds may be granted in specific situations, such as:

  • Books with obvious signs of use
  • Opened CDs, DVDs, software, or vinyl records
  • Items not in their original condition, damaged, or missing parts not due to our error
  • Items returned more than 30 days after delivery

How to Return an Item

To initiate a return, please contact us at support@ibspot.com with your order number and details about the product you wish to return.
Our team will provide you with return instructions and a prepaid return label.


Shipping Cost for Returns

Please contact us before returning any item.
We will provide a free return shipping label.

If a return is sent back without prior contact or without our provided label, we cannot be held responsible for return shipping costs.

For items valued over $75, we recommend using a trackable shipping service or purchasing shipping insurance.
We cannot guarantee that we will receive your returned item if shipped independently.


Refund Processing

Once your return is received and inspected:

  • In-store returns are refunded to the original form of payment or issued as a gift card.
  • Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.

Please allow:

  • 5–7 business days for the return to reach our Returns Center.
  • An additional 3–10 business days for your bank to post the refund to your account.

Damages, Issues & Claims

Please inspect your order immediately upon receipt.
If you receive a defective, damaged, or incorrect item, contact us right away at support@ibspot.com.
We’ll evaluate the issue promptly and make it right.

Product Claims

Before purchasing, please review product details carefully.
If there is a problem with your order upon arrival, visit our Support Center or contact us directly to arrange return shipping or replacement.


Exchanges

We do not process direct exchanges.
The fastest way to get what you need is to return the original item and place a new order once your return is accepted.


Return Address

IBSPOT Return Center
15 Sawmill Ln
Dover Plains, NY 12522
United States


Customer Support

Our support team is available 24/7 to assist with cancellations, returns, or general inquiries.

Email: support@ibspot.com
Contact Form: Contact Us page

Oops!

Sorry, it looks like some products are not available in selected quantity.

OK

Subscribe To Our Newsletter

Disclaimer: Statements made, or products sold through this website, have not been evaluated by the United States Food and Drug Administration. Products are not intended to diagnose, treat, cure or prevent any disease.