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LuKaiSen

700PCS Chrome Steel Bearing Balls Assortment Kit, G25 High Precision Imperial Sizes (1/4", 7/32", 3/16", 5/32", 1/8", 3/32") for Bicycle Hubs, Bottom Brackets, Pedals and Casters Repair

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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Jul 26
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Size: 700Pcs


Features

  • G25 HIGH PRECISION FOR SMOOTH RIDE: Experience industrial-grade smoothness with our G25 precision bearing balls. Unlike soft carbon steel alternatives that cause clicking noises and friction, these AISI 52100 chrome steel balls ensure a silent, effortless spin for your bicycle hubs and headsets, restoring that new bike feel
  • COMPLETE 6-SIZE MAINTENANCE SOLUTION: This 700pcs kit is specifically curated for bike enthusiasts: 1/4" (100), 7/32" (100), 3/16" (100), 5/32" (100), 1/8" (150), and 3/32" (150). Whether it's a vintage road bike or a heavy-duty MTB, you'll always have the right size on hand for wheels, bottom brackets, and pedals
  • CORROSION RESISTANT WITH OIL-SEALED FINISH: To solve the common issue of rust-on-arrival, each Lukaisen bearing ball is lightly coated with high-quality protective oil. This barrier resists moisture and oxidation during storage, ensuring every ball is pristine and ready for high-performance use right out of the box
  • EXCEPTIONAL HARDNESS & LOAD BEARING: Engineered for durability, our chrome steel balls maintain their perfect roundness even under extreme pressure. This makes them suitable for high-load applications beyond bicycles, such as industrial casters, drawer slides, and heavy-duty machinery where long-term wear resistance is critical
  • ORGANIZED CASE WITH CLEAR SIZE CHART: Stop guessing sizes. Our set comes in a reinforced, compartmentalized storage case with a detailed size chart. The secure latches prevent sizes from mixing during transport, keeping your workbench organized and your repair process efficient. Tip: Always apply fresh grease during installation for maximum longevity
  • VERSATILE APPLICATION RANGE: These precision bearing balls are suitable for various applications including bicycle hubs, bottom brackets, pedals, headsets, casters, drawer slides, and other mechanical equipment requiring smooth rotational movement and reliable performance

Description

Restore Your Equipment to Peak Performance with Lukaisen Precision Bearing BallsAre you tired of the gritty sensation in your pedals or the grinding sound from your bike's wheels? The secret to a smooth, silent ride lies in the quality of your bearings. The Lukaisen 700PCS Chrome Steel Assortment Kit is the ultimate professional-grade solution for cyclists, DIYers, and mechanics who demand precision and reliability.Why G25 Chrome Steel MattersStandard bearings often use low-grade carbon steel that deforms over time. Our G25 high-precision balls are crafted from AISI 52100 Chrome Steel, heat-treated for maximum hardness. This means they stay perfectly round under load, reducing friction and extending the life of your bicycle components. Whether you're overhauling a road bike hub or fixing a squeaky office chair, Lukaisen provides the industrial strength you need.No Rust, No Mess, No GuessworkWe understand the frustration of receiving rusted parts or a box of mixed-up sizes. That’s why each set is pre-lubricated with a protective oil film and housed in a rugged, labeled organizer. You’ll find exactly what you need in seconds, from the 3/32" balls for headsets to the 1/4" balls for rear hubs.Package Includes:1/4" (6.35mm) - 100PCS 7/32" (5.56mm) - 100PCS 3/16" (4.76mm) - 100PCS 5/32" (3.97mm) - 100PCS 1/8" (3.18mm) - 150PCS 3/32" (2.38mm) - 150PCS 1 x Heavy-Duty Storage Box Note: For optimal results and to prevent future corrosion, always use a high-quality bearing grease during the installation process.

Brand: LuKaiSen


Material: AISI 52100 Chrome Steel


Item dimensions L x W x H: 7.48 x 3.94 x 0.67 inches


Specification Met: G25


Bearing Type: Ball Bearing


Brand Name: LuKaiSen


Bearing Type: Ball Bearing


Part Number: LK-700


Manufacturer: LuKaiSen


Model: 1/4", 7/32", 3/16", 5/32", 1/8", 3/32


Unit Count: 700.0 Count


Included Components: ball


Item Dimensions: 7.48 x 3.94 x 0.67 inches


Material Type: AISI 52100 Chrome Steel


Compatible Lubricant: Grease


Specification Met: G25


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jul 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Good Quality and Variety. Great Selection of Ball Bearings.
Size: 640Pcs
This is a good organized set of ball bearings that can be used on bicycles, drawer slides, ratchet tools, power tool detents, and a variety of other things. They are nicely organized in a plastic case with clear information of what each of the ball bearings are on the under side of the lid (which is great). Includes sizes from 1MM to 8MM, with half-sizes also. (1/2/2.5/3/3.5/4/4.5/5/5.5/ 6/7/8mm). The size range is great, goes from super tiny, to fairly large. This will be a nice functional set for any shop or garage. Plan on buying another set with the larger sizes (10MM+) so I have what I need available. The quality of the stainless steel is immediately apparent. Each ball is perfectly spherical, highly polished, and feels incredibly durable. I've used several of the sizes so far, and they worked great. The clear, labeled compartments in the storage case make it incredibly easy to find the size you need quickly, which saves a ton of time and frustration. I would advise having a set of tweezers when handling the smaller bearings, my sausage fingers do not work well with the little ones. Overall, I am impressed with the quality and value of the bearing assortment and will purchase again when I need to. ... show more
Reviewed in the United States on June 8, 2026 by Allen
    • Repairs many mechanical objects, notably old school bikes
Size: 700Pcs
Product is exactly as described on the Amazon sales page: Seven hundred ball bearings in all small sizes. Uses: You can repair any wheel. However, these can also be used as ammunition for sling shots, which is why i got them. I suspect, but do not know, they might also be use as shot for shotguns, perhaps in BB guns, and certainly in old-time muzzle loading long-guns. The bearings are smooth and shiny. They are not pre-oiled or otherwise lubricated. You will need some CLP, WD, or similar light weight oil or grease to use them effectively. Running dry bearings is possible but they will stick and wear out very quickly, possibly even ruining your skateboard or bike hub. As ammo for slingshots they work great. Since they are shiny they are easier to find than rocks. Since they are round they fly much truer than oblong pebbles. They also work great for their intended use, as bearings in a bike. I was able to quickly and easily repair my old bike, though these are not the modern pre-seated "cased" style bearings. You would need "racers" and grease if you wish to repack cased-style bearing packs with these. You can, but most people these days just buy new ones. Great product! Works as intended and for other purposes too! ... show more
Reviewed in the United States on June 9, 2026 by Eric Engle
    • High quality assortment of truly precision ball bearings
Size: 640Pcs
The Good: * Bearing sizes are very accurate, within 1/10 of a mm * It's a nice assortment of ball bearings for a variety of projects The Meh: * While it's a good variety, there aren't a lot of some of the most used sizes, but there's a slew of the really small sizes you may not need * The price is a little high for the size of the assortment. A couple other brands have large assortments with more total ball bearings for the same price or less The Bad: * Nothing bad The Verdict: First of all, I like this brand and have a number of different assortments of screws from them. Everything is always extremely precise and well made. The biggest issue I have on this one is price and the fact that over half of the assortment is super tiny (1-3mm) ball bearings that I don't see a huge need for...it feels like padding the numbers. Overall, I do recommend it as they are high quality, but make sure this assortment has what you need in it. ... show more
Reviewed in the United States on June 9, 2026 by D. W.
    • Solid!
Size: 700Pcs
This assortment of chrome steel bearing balls has been a great addition to my workshop. The balls are smooth, consistent, and appear to be well made. The G25 precision rating gives confidence that they're suitable for a variety of projects and replacement needs where accuracy matters. One of the biggest advantages of this kit is the variety of sizes included. Having multiple imperial sizes on hand makes it easy to find the right fit without having to order individual packs. Whether you're replacing worn bearings, tackling small mechanical repairs, or working on hobby projects, it's convenient to have such a wide assortment available in one package. At around $10, I think this kit is reasonably priced for the quantity and selection you receive. Beyond their intended uses, it's handy to have extra steel balls available for miscellaneous shop and hobby applications. Overall, this is a useful assortment that offers good quality, a great range of sizes, and solid value for the price. ... show more
Reviewed in the United States on June 15, 2026 by TiffMc
    • balls, balls, balls, and more balls
Size: 700Pcs
This review is for an assortment of ball bearings, sold as Amazon ASIN B0GSZYWHPT by seller LuKaiSen. There are multiple product variants listed under this ASIN differing by primary dimensioning; I ordered the imperial/SAE sizes. The assortment ranges from 3/32 to 8/32 by 32nds. More conventionally, 3/32, 1/8, 5/32, 3/16, 7/32, and 1/4. This is pretty much any small ball bearing you might need for bicycle or caster repair if they use imperial sizes. There are 100 of each size, except the two smallest are 150 of each size. Most of the sizes were clean and bright; the 1/8 size were somewhat dirty in my set. The ball bearings are provided in a recloseable poly box. At the time of this review, the assortment is listed with a coupon offer to bring the price to below USD$7, and at that price I'd say they are a good value. ... show more
Reviewed in the United States on June 12, 2026 by Viner
    • Assortment of bearing balls are great for bicycle maintenance.
Size: 700Pcs
This kit of 700 ball bearings comes sorted into six different sizes [3/32 - 1/4"] in a carrying box. If you can keep them sorted that way, you will readily be able to find the size of replacement ball that you need for drawer slides and circular ball bearing assemblies. These balls are made of chromium steel which makes them resistant to corrosion, and are magnetic, which makes them easier to gather up if any get away from you. Their carrying box is 6 x 12.5cm. A handy kit to have to renew worn-out bearings. ... show more
Reviewed in the United States on June 10, 2026 by April
    • Come In Handy Come In Handy
Size: 640Pcs
Review Image by Glenn
Review Image by Glenn
Review Image by Glenn
I have run into problems in the past where a kit like this would have really been handy to have on around. So, I decided to finally get one. The storage case is pretty decent and keeps all the different sizes well sorted. I couldn’t get over how small those 1mm ball bearings are! I don’t think I ever will need those but who knows what the future will hold. The ball bearings in this kit all have a nice shiny finish to them. I didn’t notice anything strange like any of the ball bearings being malformed or having rough edges or burrs. They seem to be pretty good quality to me. ... show more
Reviewed in the United States on June 11, 2026 Reviewed in the United States on June 11, 2026 by Glenn
    • Great bearings, perfectly to spec
Size: 640Pcs
I've used these bearings over the last week and examined them extensively. They're perfectly to spec and there are no flaws: - I checked the diameters and they are dead on spec. - Quantity is exactly as claimed - They appear to be true 304 stainless - Case is well built Overall, great bearings, work well, no rust; recommended. ... show more
Reviewed in the United States on June 11, 2026 by Customer

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