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Shaft Adapters & Bore Reducers Market Value
Analysis of 1,653 eBay listings for shaft adapters and bore reducers.
What you'll usually pay
$26.92 typical price
Most are between$16–$153
Brand new$28.92
Used$31.95
On sale now1,653
💡 Used ones cost about 10% more here.
👉 In short easy summary
The market median is 26.92. Unbranded options command a significant premium with a 70% delta, while 2-1/2 in outside diameter parts offer the best value at a 19% discount.
💚 Best value for your money
2-1/2 in 70 on sale$21.92 · 19% cheaper
Price by inside diameter
Why? Prices range from 28.92 for 3/4 in to 42.03 for 1-5/16 in.
Price by outside diameter
Why? Values vary from 21.92 for 2-1/2 in to 32.49 for 2 in.
🛒 Some on sale right now
Common questions
What is the typical cost for a shaft adapter?
The market median price is 26.92.
Is there a price difference between new and used adapters?
The new median is 28.92, while the used median is 31.95.
Which outside diameter is the most affordable?
The 2-1/2 in outside diameter is the lowest at 21.92.
How we got these numbers
Worked out from 200 live eBay listings (price range $16–$153, odd outliers ignored). These are asking prices, so use them as a guide. Last checked July 31, 2026.