Chris King R45D GEN 4 Conversion Kits

Marsoni

M251S

$137.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Chris King R45D GEN 4 Conversion KitsConvert your R45D 6 Bolt Gen. 2 and R45D Centerlock hubs to fit Shimano HG11, HG12, Micro Spline, or SRAM XDR cassettes with our Gen 4 conversion kit. Gen 4 conversion kits include a pre assembled axle, driveshell, and updated adjusting clamp for a plug and play swap. Installation requires a 2. 5mm hex key and T10 Torx tool. Compatible with R45D 6 Bolt Gen. 2 hubs. Serial numbers will begin with 6910. Compatible with all R45D Centerlock hubs. Serial

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Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value. By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!

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Reviewed in the United States on February 16, 2026

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IT Secure Force

Birmingham, US

★★★★★ 5

Excellent dog balls — safe design and very durable

Style: Fetch Balls (Pack of 3), Size: 2.5 inch

These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference. Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design. Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.

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Reviewed in the United States on December 1, 2025

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mike

Bozeman, US

★★★★★ 5

Great ball for heavy chewers

Style: Assorted Balls (Pack of 3), Size: 2.5 inch

Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.

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Reviewed in the United States on April 26, 2026

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San Leandro, US

★★★★★ 5

Durable

Style: Fetch Balls (Pack of 2), Size: 3 inch

Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.

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Reviewed in the United States on April 5, 2026