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TRIWONDER

TRIWONDER Bike Stem Riser Adapter 150mm, 28.6mm Quill Stem Converter

  • Based on 964 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 24
Order within 16 hours and 42 minutes
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Color: Black


Size: 25,4 x 150 mm


Features

  • Improve Riding Comfort: Raises your handlebar position by adding height to the stem setup, helping create a more upright riding posture and reducing unnecessary bending during daily rides or longer cycling trips
  • Strong 6061 Aluminum Construction: Made from high-strength 6061 aluminum alloy with a polished anodized finish, providing a lightweight and durable structure for reliable long-term use
  • Accurate Size Compatibility: Designed with a 1-1/8" (28.6mm) upper diameter and available in 22.2mm or 25.4mm steerer tube options. Total length measures 150mm for added height adjustment
  • Threaded To Threadless Conversion: Converts a traditional threaded quill stem setup to fit a 1-1/8" threadless steerer system, allowing riders to upgrade their handlebar position with ease
  • Secure Installation: Features a top hex bolt installation design with a recommended tightening torque of 5Nm. Compatible with city bikes, mountain bikes (MTB), road bikes, and commuter bikes requiring a quill stem conversion

Description

Trying to broaden users' horizon and enlarge the latitude of life in a way close to nature, giving you a lower cost to close to nature. As an Outdoor & Sports brand, our mission is to promote an active and adventurous lifestyle while minimizing our environmental impact. We offer high-quality gear for adventurers of all levels, including Running, Cycling, Camping, Hiking, Tactical, Travel Gear, and more. Come and join us in exploring the great outdoors! Maximize Your Bike's Versatility with the TRIWONDER Bike Stem Quill Adapter - Convert Your Stem Size to 1-1/8" Threadless and Enjoy the Freedom to Customize Your Ride for Any Terrain and Adventure. Product Features:

Item Package Dimensions L x W x H: ‎7.72 x 3.58 x 1.1 inches


Package Weight: ‎0.19 kg


Item Dimensions LxWxH: ‎5.91 x 0.87 x 0.04 inches


Item Weight: ‎0.16 kg


Brand Name: ‎TRIWONDER


Warranty Description: ‎18-Month Warranty


Model Name: ‎Quill Stem Adapter


Color: ‎Black


Material: ‎Aluminum


Suggested Users: ‎unisex-adult


Manufacturer: ‎TRIWONDER


Part Number: ‎0919


Size: ‎25,4 x 150 mm


Sport Type: ‎Cycling


Date First Available: May 7, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 24

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
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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good product, does fit a little snug
Color: Black Size: 25,4 x 150 mm
Fits great on a 2010 KHS Urban Xscape. A little tight getting it installed (had to loosen the screw more than usual to get it into the frame, but works as advertised once in)
Reviewed in the United States on July 12, 2026 by MacBadger
    • A good stem for my Paramount PGD
Color: Black Size: 22,2 x 150 mm
Well made and functional.
Reviewed in the United States on March 4, 2026 by Patrick T. Lawlor
    • Simple, cheap - lots of advantages!
Color: Black Size: 25,4 x 150 mm
What's this for? If you're not familiar with this, it allows you to choose from any modern handlebar stem meant for a "threadless" set-up. If you want longer, shorter, lighter, fancier, etc., you're not going to find much selection in the old one-piece gooseneck style these days. Drop one of these in place of your old stem, tighten the center bolt and play musical stems to your hearts desire. Your new set-up will be stronger, safer and - since you'll be choosing stelms from modern stock - totally cutomizable. ... show more
Reviewed in the United States on July 15, 2026 by Mickey
    • It works
Color: Black Size: 22,2 x 150 mm
It's a prefect fit
Reviewed in the United States on July 8, 2026 by Van Johnson
    • Works...but needs modification.
Color: Black Size: 25,4 x 150 mm
Like other reviewers, out of the box, this did NOT fit into my older TREK Multi-Track 7600. It has a 25.4 receiver tube. I had to sand off all the powder coat on the stem and lube it up with some grease to get it to fit. It was cheap enough, but if I want to use it in a taller position I'll have to use some spacers to hide the sanded aluminum or hand paint it. Other than that, the handlebar stem I bought fit fine on the top part of it and it seems to be sturdy. I haven't rode the bike yet, so we'll see. ... show more
Reviewed in the United States on May 22, 2026 by PKS
    • Fit is everything
Color: Black Size: 25,4 x 150 mm
These make bikes comfortable where they weren't at one point make sure you get the right one they're great
Reviewed in the United States on July 7, 2026 by Cafe racer
    • Great product
Color: Black Size: 22,2 x 150 mm
Arrived in a timely manner as advertised. Great product. Fit perfect
Reviewed in the United States on January 14, 2026 by Scott Farrell
    • 22.3mm Diameter, did not fit
Color: Black Size: 22,2 x 150 mm
Like others, the fit was not right. It's just-barely too wide. On my digital micrometer, it came to 22.3mm. I could probably get it to fit with some grinding or lubing it up with silicone and pounding it in with a rubber mallet. But I chose to keep it in unused condition and return it. I'm sorry that it did not fit, because otherwise the build quality seems solid (untested) and the surface is what I like for my bike's components. It's a nice looking design, for what it is. If I can't find something else that does it, I will buy this again and make it work. ... show more
Reviewed in the United States on May 11, 2026 by Mark

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