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MARTIN 40B12
MARTIN 40B12
MARTIN 40B12
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MARTIN 40B12

Marsoni M251S
Sale price$149.00
Pay 4 payments of $37.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
MARTIN 40B1240B12 ROLLER CHAIN SPROCKET STANDARD STOCK NO. 40 CHAIN 1 2 INCH PITCH TYPE B PLAIN BORE 1 2 INCH BORE DIAMETER 12 TEETH 7 8 INCH LENGTH THRU BORE 2. 17 INCH OUTER DIAMETER 1 9 16 INCH HUB DIAMETER SINGLE STRAND HUB RECESSED FOR CHAIN STEEL
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  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 1729 reviews
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Product Reviews
I
Verified Purchase
Ian H
Lake Worth, US
★★★★★ 3
Check engine light
Style: Gloss Black Single Slat, Size: G20（2019-2022）, Style: Gloss Black Single Slat, Size: G20（2019-2022）
Looks good but will throw a check engine light on your car. The fitment isn’t perfect causing the adaptive vents to show that they are failing even though they are not
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
W
Verified Purchase
Works great and a better price than others. Works well in the 16” oven.
Battle Creek, US
★★★★★ 5
Quick fix
Style: Gloss Black Single Slat, Size: E46（2002-2005）4-Door
Easily Installed with no modification in under a minute. The finish was a little glossier, then OE.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
C
Verified Purchase
Carlos M. Ortiz
Omaha, US
★★★★★ 5
Exact Fit for 2001 BMW 325CI Convertible
Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door, Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door
Perfect fit for a 2001 BMW 325CI convertible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
T
terrahjo
Port Orchard, US
★★★★★ 5
Identical to originals at 1/4 of the price.
This is a review on the Kawaski KRX wheel hub covers. I am very impressed. These are identical in look to the OEM Kawasaki KRX hub covers. Those cost over $28.00 for just one. This is a 4 pack for less than that price. The okastic quality is the same and these fit the machine perfectly. We got them to replace as the others break and fall off and you can not tell which one is new compared to the old ones. Overall great buy and identical to the original. Highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 10, 2025
S
Shanody
Bozeman, US
★★★★★ 5
Fit supper snug!
Awesome product. I lost 2 of them on my Kawasaki Teryx 1000, and these caps fit super snug. I almost didn't think they fit because they were so tight, and had to use a rubber mallet to gentle tap them on. Worth the buy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025

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