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Chris King ISO B and Boost 6 Bolt GEN 4 Conversion Kits
Chris King ISO B and Boost 6 Bolt GEN 4 Conversion Kits
Chris King ISO B and Boost 6 Bolt GEN 4 Conversion Kits
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Chris King ISO B and Boost 6 Bolt GEN 4 Conversion Kits

Marsoni M251S
Sale price$137.50
Pay 4 payments of $34.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Chris King ISO B and Boost 6 Bolt GEN 4 Conversion KitsConvert your ISO B and Boost 6 Bolt hubs to fit Shimano HG, Micro Spline, or SRAM XD cassettes using our latest technology. Gen 4 conversion kits include a pre assembled axle, driveshell, and adjusting clamp for a plug and play swap. Installation requires a 2. 5mm hex key and T10 Torx tool. Compatible with ISO B 6 Bolt hubs. Serial numbers will begin with 851. 148x12mm axle. Available with stainless steel or ceramic bearings. Available in Silver or
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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
4.1 ★★★★★
Based on 2214 reviews
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Product Reviews
L
Verified Purchase
Little Oak
Chelsea, US
★★★★★ 4
It will fit a 2022 Subaru Outback
Size: (Pack of 1)
Higher quality than OEM item fit and arrived on time. This was for a 2023 Subaru Outback
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025
B
Verified Purchase
Bob P
Belleville, US
★★★★★ 5
High quality
Size: (Pack of 1)
Looks a lot nicer than the one that came with my Subaru Outback (OEM). Performs the same or better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
L
Verified Purchase
Leon Broneshter
Fort Morgan, US
★★★★★ 5
Make sure you get the right part.
Perfect fit. Helped my fuel efficiency on my long trip from California to Tennessee. High quality materials that are easily maintained. Easily replaceable on a 2024 Honda Accord Hybrid Sport (2.0L)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 2, 2025
M
Verified Purchase
Mike M.
Chelsea, US
★★★★★ 5
Perfect fit Honda accord
Perfect fit. +2 mpg on a Honda hybrid. Excellent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
A
Verified Purchase
Ayra G.
Boise, US
★★★★★ 5
Premium product!
Must have, save hundreds over time. Rinse and put back on. Get the cleaners and spray to keep it new.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026

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