• seat post shim for bike
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WS - Seatpost Shim for Bicycle

WS - Seatpost Shim for Bicycle

$12.00 USD
$12.00 USD
Sale Sold out

This shim will let you easily fit the 27.2mm or 31.6mm Dual-Position Seatpost or ShockStop Seatpost into your larger seat tube. Just drop the shim in your frame's seat tube and insert the seatpost. Once installed, the shim is essentially invisible.

Details:

• 27.2mm seatpost size can be adapted to 28.6, 29.8, 30.0, 30.4, 30.9, 31.6, and 31.8mm outer diameter (seat tube diameter)
• 31.6mm seatpost size can be adapted to 34.9mm outer diameter (seat tube diameter)
• 100mm (4-inch) length spreads out clamping load along seatpost and frame

Technical Specifications

Weight

27.2-28.6mm - 16 g
27.2-29.8mm - 30 g
27.2-30.0mm - 33 g
27.2-30.4mm - 36 g
27.2-30.9mm - 43 g
27.2-31.6mm - 52 g
27.2-31.8mm - 55 g

Length100 mm (4 inches)

FAQ

Can I use a shim to adapt to a non-round or "aero" seatpost?

Unfortunately, the seatpost shim is only designed to adapt our 27.2mm round seatpost to other larger round seatpost diameters (for example, 31.6mm or 30.9mm). If your seatpost is oval or "aero" shaped, then both of our seatposts are not compatible with your bicycle.

My bike has a 25.4mm seatpost. Do you have a shim for that size?

The short answer is no. Both of our seatposts are only available in 27.2mm diameter. Since that is larger than 25.4mm, it is not possible to use a shim to adapt the seatpost to your frame.

To read more Frequently Asked Questions, click here.

Instructions

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Variant Variant total Quantity Price Variant total
27.2 to 28.6mm ShimRS-21-04
27.2 to 28.6mm ShimRS-21-04
$12.00/ea		 $0.00
Sold out
$12.00/ea $0.00
27.2 to 29.8mm ShimRS-21-05
27.2 to 29.8mm ShimRS-21-05
$12.00/ea		 $0.00
Sold out
$12.00/ea $0.00
27.2 to 30.0mm ShimRS-21-06
27.2 to 30.0mm ShimRS-21-06
$12.00/ea		 $0.00
Sold out
$12.00/ea $0.00
27.2 to 30.4mm ShimRS-21-28
27.2 to 30.4mm ShimRS-21-28
$12.00/ea		 $0.00
$12.00/ea $0.00
27.2 to 30.9mm ShimRS-21-02
27.2 to 30.9mm ShimRS-21-02
$12.00/ea		 $0.00
$12.00/ea $0.00
27.2 to 31.6mm ShimRS-21-01
27.2 to 31.6mm ShimRS-21-01
$12.00/ea		 $0.00
$12.00/ea $0.00
27.2 to 31.8mm ShimRS-21-03
27.2 to 31.8mm ShimRS-21-03
$12.00/ea		 $0.00
$12.00/ea $0.00
31.6 to 34.9mm ShimRS-21-29
31.6 to 34.9mm ShimRS-21-29
$12.00/ea		 $0.00
$12.00/ea $0.00
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