๐ŸŒ Worldwide shipping ยท 30-day returns ยท Rated Excellent on Trustpilot โ˜…โ˜…โ˜…โ˜…ยฝ
Price
$79.99
YELARXI Bicycle Seat Post Adapter Shim, 27.2 to 33.9 mm & Alloy & Black & 1 Pack Bike Seat Tube Seat Post-Fitting for (Outdoor/Mountain/Road/City Bike/Electric Bicycle) โ€” image 1
Seat PostsYELARXIโœ“ In stock

YELARXI Bicycle Seat Post Adapter Shim, 27.2 to 33.9 mm & Alloy & Black & 1 Pack Bike Seat Tube Seat Post-Fitting for (Outdoor/Mountain/Road/City Bike/Electric Bicycle)

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$79.99

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About this item
  • Reliable Material: Crafted from high-strength aluminum alloy, this seat post shim adapter ensures a rigid and secure connection between your frame and seat tube. It is more durable and reliable than plastic alternatives, providing superior resistance to compression and deformation for long-lasting performance and enhanced riding safety.
  • Relevant Usage: This bicycle seat post is the perfect solution for installing a 27.2 mm diameter seat post into a bicycle frame designed for a 33.9 mm seat post. The seat post is suitable for upgrading, repairing, or customizing various bikes, including mountain bikes and road bikes, allowing you to use your preferred seat post without changing the frame.
  • Easy-to-Use: Installation is a quick and simple process. Just insert the seat post shim adapter into your bike's 33.9 mm seat tube, then slide your 27.2 mm seat post into the shim. Finally, tighten the existing seat clamp bolt normally. The bicycle seat post is even to create a firm, wobble-free fit, requiring no special tools or technical skills.
  • Size: This bicycle seat post performs a precise 27.2mm to 33.9mm conversion. The adapter itself features a 3mm wall thickness, a total length of 60mm for enhanced stability, and a 2.5mm wide compression slot. It is designed with a maximum outer diameter of 35mm at its top flange to ensure a secure and perfectly seated fit within your bicycle frame.
  • Key Notices: Please accurately measure both your seat post and frame tube before purchasing to ensure a perfect match. For your safety, always use a torque wrench and do not exceed your frame manufacturer's recommended torque specification when tightening. Over-tightening can damage the frame or shim.
Product description

Reliable Material: Crafted from high-strength aluminum alloy, this seat post shim adapter ensures a rigid and secure connection between your frame and seat tube. It is more durable and reliable than plastic alternatives, providing superior resistance to compression and deformation for long-lasting performance and enhanced riding safety. Relevant Usage: This bicycle seat post is the perfect solution for installing a 27.2 mm diameter seat post into a bicycle frame designed for a 33.9 mm seat post. The seat post is suitable for upgrading, repairing, or customizing various bikes, including mountain bikes and road bikes, allowing you to use your preferred seat post without changing the frame. Easy-to-Use: Installation is a quick and simple process. Just insert the seat post shim adapter into your bike's 33.9 mm seat tube, then slide your 27.2 mm seat post into the shim. Finally, tighten the existing seat clamp bolt normally. The bicycle seat post is even to create a firm, wobble-free fit, requiring no special tools or technical skills. Size: This bicycle seat post performs a precise 27.2mm to 33.9mm conversion. The adapter itself features a 3mm wall thickness, a total length of 60mm for enhanced stability, and a 2.5mm wide compression slot. It is designed with a maximum outer diameter of 35mm at its top flange to ensure a secure and perfectly seated fit within your bicycle frame. Key Notices: Please accurately measure both your seat post and frame tube before purchasing to ensure a perfect match. For your safety, always use a torque wrench and do not exceed your frame manufacturer's recommended torque specification when tightening. Over-tightening can damage the frame or shim.

Product details
Brand
YELARXI
Manufacturer
YELARXI
Material
Aluminium
Colour
Black
Size
27.2 to 33.9 mm
Weight
0.05 kg
Part number
ye002609a250601ye

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
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Excellent
4.5 average rating
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S
Sigalit
๐Ÿ‡ฎ๐Ÿ‡ฑ ยท January 2026
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I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
๐Ÿ‡ฆ๐Ÿ‡บ ยท November 2025
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The package was here in Australia from England in a few days โ€” so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1โ€“2 of 10 reviews

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