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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
4.8 ★★★★★
Based on 2321 reviews
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Product Reviews
P
Verified Purchase
Pilot Wife
New York, US
★★★★★ 5
Nice and classy
Size: 8.5" x 5.8" x 1.9", Color: Black
Bought this for my husband for Christmas and he loved it. Super classy elegant well made box. Perfect for bedside nightstand for your watch and rings.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
S
Verified Purchase
SC
Whiting, US
★★★★★ 5
Nice looking and durable
Size: 8.5" x 5.8" x 1.9", Color: Black
I bought this for my little nephew to put his rocks in and out and to keep them in. It’s perfect and durable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
A
Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 5
Perfect size
Size: 8.5" x 5.8" x 1.9", Color: Black, Size: 8.5" x 5.8" x 1.9", Color: Black
Love the look of leather and metal together.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
C
Verified Purchase
ct13
West Palm Beach, US
★★★★★ 4
Handy small tray
Size: 8.5" x 5.8" x 1.9", Color: Black, Size: 8.5" x 5.8" x 1.9", Color: Black
This tray fits a small side table well. It holds a few remotes and has nice details.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 18, 2025
D
Verified Purchase
DCB
Houston, US
★★★★★ 5
Valet Tray
Size: 8.5" x 5.8" x 1.9", Color: Black
Perfect!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026

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