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ONIPAX Bike Handlebar Shim 1" to 1-1/4”/ 25.4 to 31.8 mm Bicycle Handlebar Conversion Shims Adapter Clamp Spacer

  • Based on 20 reviews
Condition: New
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Availability: Only 7 left in stock, order soon!
Fulfilled by Amazon

Arrives Tuesday, Sep 9
Order within 16 hours and 31 minutes
Available payment plans shown during checkout

Style: Titanium


Size: 45mm


Features

  • Allows you to use standard size handlebars of smaller diameter on a large shank. Convert your bicycle handlebar from 1"(25.4mm) to 1-1/4(31.8mm).
  • Easy to install, just put the handlebar shim between the handlebar and the stem.
  • Two lengths for your choice 41 & 45mm suitable for most bicycles.
  • Made of High Quality Aluminum Alloy, Lightweight and Durable.
  • Made in Taiwan. We pride ourselves on product quality. Let us help you if you have any questions, we will be glad to assist you

Color: Titanium


Brand: ONIPAX


Material: Aluminum


Manufacturer: ‎ONIPAX


Brand: ‎ONIPAX


Model: ‎Shim


Item Weight: ‎0.704 ounces


Package Dimensions: ‎4.09 x 1.73 x 0.79 inches


Country of Origin: ‎Taiwan


Item model number: ‎STEM-S06


Exterior: ‎Chrome


Manufacturer Part Number: ‎STEM-S06


Date First Available: September 20, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great option
Style: Black Size: 45mm
The handlebars on my bike were moving when I hit a bump or pulled back or pushed on them which is unsafe. I first attempted to remove the protective coating from the groves that hold the bars in place and it worked for a while but started moving again. All the rough groves were getting rounded off and the bars kept slipping. Tired super glue next and that did not work super well. These shims are a perfect fit and I am expecting them to be a long term solution to making the handlebars secure forever. Glad I ran across these as an option. ... show more
Reviewed in the United States on January 4, 2023 by Gary Gary

  • Two Thumbs Up
Style: Black Size: 41mm
I had an issue with my handle bars fitting my bike clamp and ordered these shims to make it fit. Delivery was fast and the item is very easy to install. And very strong material. They fit perfectly on my bike
Reviewed in the United States on October 31, 2022 by Marla

  • Made well
Style: Black Size: 45mm
These spacers work well. They will do the trick if you have too small of handlebars for the clamp. I had no issues with these.
Reviewed in the United States on January 25, 2023 by KP656

  • transparent
Style: Titanium Size: 45mm
Once mounted it hasn't moved. It's very light and is basically invisible. It's like it's not there which is exactly what you want out of an adapter of any kind. I would recommend
Reviewed in the United States on December 3, 2022 by LiquidSteam

  • Works well as intended.
Style: Black Size: 41mm
I ordered the 41mm size and it worked perfectly to fit my 25.4mm beach cruiser-style handlebar onto a 31.8mm stem. The installation is straightforward and easy, and things couldn't get simpler. 5 stars.
Reviewed in the United States on October 14, 2022 by optimummind

  • work perfectly
Style: Black Size: 41mm
I installed a Bicycle Handlebar Stem Extender for my Mountain Bike and added this Adapter Clamp Spacer to make it fit. Delivery was fast and the item was very easy to install. Strong material. They fit perfectly on my bike.
Reviewed in the United States on January 2, 2023 by J.D

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