Eighth Generation | Authentically Native Designed | Wool Blankets

Seatpost Shims

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$5 $9.99 In stock

Switching frames doesn’t mean you have to switch posts! Use your old posts without worry with the Problem Solvers Seatpost Shims.


  • Due to the ultra-thin spec of this shim and varied manufacturing tolerances of frames and seatposts, we can't guarantee compatibility with all brands on the market
  • Be gentle and use grease
Before you pay

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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If you need a refund

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Please contact us for the refund processing timeframe before returning an item.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 4 reviews)

Mia ★★★★★

Swapped frames last month and didn't want to buy a whole new post, so this shim did the trick. The ultra-thin wall fit snugly with no wobble once torqued down.

Madison L. ★★★★★

I reused my old post on a new frame thanks to this shim, and it seated perfectly with no wobble. The ultra-thin spec is what makes it work, since the fit felt snug without any creaking on the first ride.

Timothy Z. ★★★★★

Swapped my old 27.2 post into a 30.9 frame with this shim and it seated perfectly, no creaking on the first gravel ride. The ultra-thin wall means it slips in without shaving the post or fighting the collar.